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    98 Products

    Starrett High-Accuracy Combination Squares

    Replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. The blade on these squares meets Fed. Spec. GGG-R-791H, which establishes uniform standards for accuracy, graduations, and size. Blades are labeled with numeric increments that are less than 1" for quick reading.
    Blades with Square Head
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head .
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head , Inch.

    Inch

    Square head checks 90° angles.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    4"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"5/8"1/16"SteelSatinChrome, SilverBlackEtched2 1/4"2108A210000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt for Square and Center Heads1955A81000000
    Blades with Square Head and Center Head
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head and Center Head .
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head and Center Head , Inch.

    Inch

    Square head checks 90° angles.
    Center head identifies the center on pipes, rods, and shafts.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    4"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"5/8"1/16"SteelSatinChrome, SilverBlackEtched2 1/4"2108A110000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt for Square and Center Heads1955A81000000
    Blades with Square Head with Built-In Level and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch, Metric, 4/32" Numeric Graduations - 2, 10 mm Numeric Graduations.

    Inch/Metric

    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch, 4/32" Numeric Graduations, 8/64" Numeric Graduations - 2.

    Inch

    Square head checks 90° angles.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    6"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"3/4"5/64"Steel—SilverBlackEtched2 13/32"2108A440000000
    6"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"3/4"5/64"SteelSatinChrome, SilverBlackEtched2 13/32"2108A22000000
    6"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.002" to 0.004"3/4"5/64"SteelSatinChrome, SilverBlackEtched2 13/32"2108A28000000
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"Steel—SilverBlackEtched4 1/2"2108A45000000
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"2108A23000000
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"2108A29000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"2108A25000000
     
    Inch/Metric
    11 3/4"/300 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.005"/
    -0.09 mm to 0.15 mm    		1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"2108A26000000
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade4264N110000000
    Replacement Lockbolt for Square and Center Heads1955A8200000
    Replacement Lockbolt for Square, Center, and Protractor Heads1955A830000
    Blades with Square Head with Built-In Level, Center Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber.
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Center head identifies the center on pipes, rods, and shafts.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"2108A130000000
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade4264N110000000
    Replacement Lockbolt for Square, Center, and Protractor Heads1955A830000
    Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber.
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSilverBlackEtched4 1/2"2108A570000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SteelSilverBlackEtched4 1/2"2108A59000000
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade4264N110000000
    Replacement Lockbolt for Square, Center, and Protractor Heads1955A830000
    Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber, Inch, Metric, 4/32" Numeric Graduations - 2, 10 mm Numeric Graduations.

    Inch/Metric

    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber, Inch, 4/32" Numeric Graduations, 8/64" Numeric Graduations - 2.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Hardened Steel Square Head—Hardened-steel square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Steel
    Square Head
    Blade Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"Steel—SilverBlackEtched4 1/2"2108A510000000————0
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"2107A510000000
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.005"1"3/32"Steel—SilverBlackEtched4 1/2"2108A54000000————0
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"2107A54000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"Steel—SilverBlackEtched4 1/2"2108A53000000————0
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"2107A53000000
    24"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.007"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"2107A56000000
     
    Inch/Metric
    11 3/4"/300 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.005"/
    -0.09 mm to 0.15 mm    		1"3/32"Steel—SilverBlackEtched4 1/2"2108A55000000————0
    11 3/4"/300 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.005"/
    -0.09 mm to 0.15 mm    		1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"2107A57000000
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade4264N110000000
    Replacement Lockbolt for Square, Center, and Protractor Heads1955A830000

    Squares with Adjustable Blade

    Image of Product. With Beveled Blade. Front orientation. Contains Annotated, MultipleImages. Squares. Squares with Adjustable Blade, Inch, 4/32" Numeric Graduations, 8/64" Numeric Graduations - 2, 1" Numeric Graduations, Beveled Blade.
    Image of Product. Without Beveled Blade. Front orientation. Contains Annotated. Squares. Squares with Adjustable Blade, Inch, 4/32" Numeric Graduations, 8/64" Numeric Graduations - 2, 1" Numeric Graduations.

    With Beveled Blade

    Without Beveled Blade

    Measure and mark material exactly where you need to with a sliding blade.
    Etched—Etched graduation marks are wear resistant.
    Satin—Satin blade appearance is corrosion resistant and reduces glare.
    Beveled Blade—30°, 45°, and 90° squares include a separate beveled blade for measuring 30° and 45° angles.
    Blade
    Graduation
    Angle
    Measured
    Blade
    Lg.
    Handle
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Color
    Color
    Type
    Handle
    Material
    Appearance
    Includes
    Each
    Inch
     
    Chrome-Plated Steel
    30°, 45°, 90°4"2 1/2"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")3/4"3/32"SilverBlackEtchedCast IronSatinBeveled Blade8606A55000000
    30°, 45°, 90°6"2 1/2"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")3/4"3/32"SilverBlackEtchedCast IronSatinBeveled Blade8606A5700000
    90°4"2 1/2"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")3/4"3/32"SilverBlackEtchedCast IronSatin—8606A5400000
    90°6"2 1/2"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")3/4"3/32"SilverBlackEtchedCast IronSatin—8606A5600000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt8606A6100000

    Starrett High-Accuracy Combination Square Heads

    Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts.
    Square Heads
    Image of Product. Front orientation. Combination Square Heads. Starrett High-Accuracy Combination Square Heads, Square Heads.
    Square heads check 90° angles.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Cast Iron
    For Blade
    Lg.
    Features
    Each
    4"—1955A11000000
    6"Built-In Level1955A1200000
    12" to 48"Built-In Level1955A1300000
    Replacement Square Head Lockbolts
    Image of Product. Front orientation. Square Head Lockbolts. Starrett High-Accuracy Combination Square Heads.
    For Head Style
    For Blade Lg.
    Each
    Center, Square4"1955A81000000
    Center, Square6"1955A8200000
    Center, Square, Protractor12" to 36"/300 mm to 600 mm1955A830000
    Center Heads
    Image of Product. Front orientation. Combination Square Heads. Starrett High-Accuracy Combination Square Heads, Center Heads.
    Center heads identify the center on pipes, rods, and shafts.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Cast Iron
    For Blade
    Lg.
    Each
    4"1955A17000000
    6"1955A1800000
    12" to 48"1955A1900000
    Replacement Square Head Lockbolts
    Image of Product. Front orientation. Square Head Lockbolts. Starrett High-Accuracy Combination Square Heads.
    For Head Style
    For Blade Lg.
    Each
    Center, Square4"1955A81000000
    Center, Square6"1955A8200000
    Center6"1955A8500000
    Center, Square, Protractor12" to 36"/300 mm to 600 mm1955A830000
    Protractor Heads
    Image of Product. Front orientation. Combination Square Heads. Starrett High-Accuracy Combination Square Heads, Protractor Heads.
    Protractor heads measure angles.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Protractor
    Cast Iron
    For Blade
    Lg.
    Reversible
    Features
    Angle Measured
    Range
    Graduations (Numeric
    Increments)
    Each
    12" to 48"NoBuilt-In Level0° to 180°1° (10°)1955A290000000
    12" to 48"YesBuilt-In Level0° to 180°1° (10°)1955A25000000
    Replacement Square Head Lockbolts
    Image of Product. Front orientation. Square Head Lockbolts. Starrett High-Accuracy Combination Square Heads.
    For Head Style
    For Blade Lg.
    Each
    Center, Square, Protractor12" to 36"/300 mm to 600 mm1955A8300000

    High-Accuracy Combination Square Heads

    Attach to High-Accuracy Combination Square Blades with the included lockbolts.
    Square Heads
    Image of Product. Front orientation. Combination Square Heads. High-Accuracy Combination Square Heads, Square Heads.
    Square heads check 90° angles.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
    Combination
    Square Heads
    Replacement Square
    Head Lockbolts
    For Blade
    Lg.
    Features
    Each
    Each
    Cast Iron
    12" to 24"Built-In Level21115A2700000021115A3600000
     
    Hardened Cast Iron
    12" to 24"Built-In Level21115A280000021115A360000
     
    Center Heads
    Image of Product. Front orientation. Combination Square Heads. High-Accuracy Combination Square Heads, Center Heads.
    Center heads identify the center on pipes, rods, and shafts.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
    Combination
    Square Center Heads
    Replacement Square
    Head Lockbolts
    For Blade
    Lg.
    Each
    Each
    Cast Iron
    12" to 24"21115A2900000021115A3600000
     
    Hardened Cast Iron
    12" to 24"21115A310000021115A360000
     
    Protractor Heads
    Image of Product. Front orientation. Combination Square Heads. High-Accuracy Combination Square Heads, Protractor Heads.
    Protractor heads measure angles.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Combination Square Protractor Heads
    Replacement Square
    Head Lockbolts
    Protractor
    For Blade
    Lg.
    Reversible
    Angle Measured
    Range
    Graduations (Numeric
    Increments)
    Each
    Each
    Cast Iron
    12" to 24"Yes0° to 180°1° (10°)21115A3200000021115A3600000
     

    Welding Fixture Squares

    Image of ProductInUse. Front orientation. Contains Annotated. Fixture Squares. Welding Fixture Squares.
    Image of Product. 2 Axes With Leveling Tabs. Front orientation. Fixture Squares. Welding Fixture Squares, 2 Axes with Leveling Tabs.
    Image of Product. 2 Axes with Joint Access Cutouts and Leveling Tabs. Front orientation. Fixture Squares. Welding Fixture Squares, 2 Axes with Joint Access Cutouts and Leveling Tabs.
    Image of Product. Front orientation. Fixture Squares. Welding Fixture Squares, 3 Axes.

    2 Axes With Leveling Tabs

    2 Axes with Joint

    Access Cutouts and

    Leveling Tabs

    3 Axes

    Position your workpieces at the correct angle prior to welding. These squares have an extra-wide head, so you can clamp them in place.
    Joint Access Cutouts—Squares with joint access cutouts make it easier to reach joints, such as when welding and gluing.
    Leveling Tabs—Leveling tabs are for aligning workpieces with one another.
    Cast Iron—Cast iron squares are durable and difficult to dent or scratch. They resist weld spatter, but they’re more likely to corrode than aluminum.
    Overall
    Cast Iron
    Holding
    Angle
    Lg.
    Wd.
    Ht.
    Flange
    Thk.
    Each
    2 Axes with Leveling Tabs
    45°, 90°4"4"1 1/2"1/4"4984N42000000
    45°, 90°6"6"1 1/2"1/4"4984N4300000
    45°, 90°12"12"3"1/4"4984N46000000
     
    2 Axes with Joint Access Cutouts and Leveling Tabs
    45°, 90°4"4"1 1/2"1/4"4984N2200000
    45°, 90°6"6"1 1/2"1/4"4984N2300000
    45°, 90°12"12"3"3/8"4984N26000000
     
    3 Axes
    90°10 1/2"10 1/2"8"1"4984N101000000
     

    Heavy Duty Combination Squares

    Built for welding and other heavy duty fabricating jobs, these squares have an extra-wide head and a large thumbwheel, so they’re easy to adjust and hold while wearing gloves. They combine the functionality of a try square, miter square, depth gauge, marking gauge, 90° level, and ruler in one tool. Add a clamp to the extra-wide head or use the included leveling tabs to hold material while welding. The tabs can also be used to set workpieces level to one another before fabricating. The fully recessed blade makes it easy to measure around obstacles.
    Blades with Square Head with Built-In Level and Leveling Tabs
    Image of Product. Front orientation. Contains Annotated. Squares. Heavy Duty Combination Squares, Blades with Square Head with Built-In Level and Leveling Tabs.
    Image of Product. Front orientation. Contains Annotated. Squares. Heavy Duty Combination Squares, Blades with Square Head with Built-In Level and Leveling Tabs, Inch.

    Inch

    Square head checks 90° angles.
    Cast Iron Square Head—Squares with a cast iron head are durable and resist both scratches and dents. However, they’re more prone to corrosion than squares with zinc alloy heads.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Flange
    Thk.
    Head
    Lg.
    Each
    Inch
    12"1/8" (1"), 1/16" (1")1/8" (1"), 1/16" (1")1"7/64"Stainless SteelGoldBlackEtched2"5"4998N120000000
     

    High-Accuracy Combination Squares

    Use these squares in place of your try square, miter square, depth gauge, height gauge, center-point finder, and level. Blades are labeled with numeric increments that are less than 1" for quick reading.
    Blades with Square Head with Built-In Level and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber.
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Hardened Cast Iron Square Head—Hardened cast iron square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Cast
    Iron Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"21115A14000000021115A180000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt21115A3600000
    Blades with Square Head with Built-In Level, Center Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber.
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Center head identifies the center on pipes, rods, and shafts.
    Hardened Cast Iron Square Head—Hardened cast iron square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Cast
    Iron Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"21115A13000000021115A170000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt21115A3600000
    Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber.
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Hardened Cast Iron Square Head—Hardened cast iron square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Cast
    Iron Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"21115A11000000021115A150000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt21115A3600000

    Mitutoyo Squareness Gauges

    Image of Product. Front orientation. Squareness Gauges. Mitutoyo Squareness Gauges.
    Ensure parts are perfectly straight and square—these gauges detect surface deviations so small the human eye can’t see them. As you slide the lever on these gauges up and down, a dial test indicator moves along the vertical surface of your workpiece, measuring how straight and square it is. Checking for slight angles on machined parts or frames verifies they will align properly and function correctly. You can adjust the squareness of the gauges to fine-tune for differences in temperature and humidity and to maintain precision over years of use. Measure an object for height with the scale along the side of the gauge. The housing is cast iron, so the gauges are stable and stand up to frequent use.
    Material
    Base
    Distance Measured
    Range, mm
    Accuracy
    Measuring Increments,
    mm
    Squareness
    Tolerance, mm
    Straightness
    Tolerance, mm
    Housing
    Column
    Lg.
    Wd.
    Includes
    Mfr. Model
    No.
    Each
    0 to 150±0.003 mm0.0020.0030.002Cast IronAluminum
    		7"4"Dial Indicator, Micrometer311-2156883N11000000000
    0 to 250±0.003 mm0.0020.0090.0035Cast IronAluminum
    		7"4"Dial Indicator, Micrometer311-2256883N1200000000
    0 to 450±0.003 mm0.0020.0060.0025Cast IronAluminum
    		7"4"Dial Indicator, Micrometer311-2456883N1300000000

    Scratch-Resistant High-Accuracy Combination Squares

    A titanium coating protects the blade against scratches and wear. Use these squares to replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. Blades are labeled with numeric increments that are less than 1" for quick reading.
    Blades with Square Head with Built-In Level and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber.
    Image of Product. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.002"1"3/32"Titanium-Coated SteelGoldBlackEtched4 1/2"21155A340000000
     
    Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber.
    Image of Product. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.002"1"3/32"Titanium-Coated SteelGoldBlackEtched4 1/2"21155A360000000
     

    Fixture Squares

    Image of Product. Style B. Front orientation. Contains Annotated. Fixture Squares. Fixture Squares, Style B.
    Image of Product. Style E. Front orientation. Contains Annotated. Fixture Squares. Fixture Squares, Style E.

    Style B

    Style E

    Image of Product. Style F (Left Orientation). Front orientation. Contains Annotated. Fixture Squares. Fixture Squares, Style F, Left-Hand-Side Orientation.
    Image of Product. Style F (Right Orientation). Back orientation. Contains Annotated. Fixture Squares. Fixture Squares, Style F, Right-Hand-Side Orientation.

    Style F (Left

    Orientation)

    Style F (Right Orientation)

    Build fixtures on multiple sides of these squares—you can use them individually or stack them. Made from iron or steel, they’re strong and stable for accurate fixturing. They hold up to welding, fabrication, and other demanding applications.
    Slots
    Holes
    Tolerance
    Style
    Lg.
    Wd.
    Ht.
    Plate
    Thk.
    Orientation
    No.
    of
    Shape
    Lg.
    Wd.
    No.
    of
    Dia.
    Ctr.-to-Ctr.
    (A)
    Ctr.-to-Ctr.
    (B)
    Wt.,
    lb.
    Squareness
    per 4"
    Parallel
    Material
    Each
    B3 3/4"4"3 3/4"1/2"—4
    1    		Straight
    Curved    		2"
    2 13/16"    		5/8"
    5/8"    		65/8"2"—5Not RatedNot RatedIron1392N1110000000
    E6"2"12"1/2"—2Straight4"5/8"265/8"1"1"70.002"0.006"Iron1392N15000000
    F8"2"20"1/2"Left-Hand Side4
    2
    1    		Straight
    Curved
    Curved    		2"
    2 13/16"
    5 5/8"    		5/8"
    5/8"
    5/8"    		435/8"1"1"15Not RatedNot RatedIron1392N115000000
    F8"2"20"1/2"Right-Hand Side4
    2
    1    		Straight
    Curved
    Curved    		2"
    2 13/16"
    5 5/8"    		5/8"
    5/8"
    5/8"    		435/8"1"1"15Not RatedNot RatedIron1392N114000000
     

    Grind-Your-Own Lathe Tool Blanks

    Grind these hardened steel blanks to the size and shape you need.
    Square Shank
    Image of Product. Front orientation. Lathe Tool Blanks. Grind-Your-Own Lathe Tool Blanks, Square Shank.
    T15 High-Speed Tool Steel—T15 high-speed tool steel has excellent wear resistance and good heat resistance for use on all metal and plastic.
    Shank
    T15 High-Speed
    Tool Steel
    Wd.
    Ht.
    Overall
    Lg.
    End
    Shape
    Bevel
    Angle
    Each
    1/8"1/8"2 1/2"Bevel10°3205A59000000
    3/16"3/16"2 1/2"Bevel10°3205A6100000
    1/4"1/4"2 1/2"Bevel10°3205A6200000
    5/16"5/16"2 1/2"Bevel10°3205A6300000
    3/8"3/8"3"Bevel10°3205A6400000
    7/16"7/16"3 1/2"Bevel10°3205A6500000
    1/2"1/2"4"Bevel10°3205A6600000
    5/8"5/8"4 1/2"Bevel10°3205A6700000
    3/4"3/4"5"Bevel10°3205A68000000
    7/8"7/8"6"Bevel10°3205A69000000
    1"1"7"Bevel10°3205A58000000

    Two-Axis Levels

    Image of Product. Front orientation. Levels. Two-Axis Levels.
    Align horizontal surfaces in two directions simultaneously without having to twist your level around. Set these levels flat on shelving or other surfaces to make sure they aren't tilting forwards, backwards, or sideways.
    Housing
    Lg.
    Wd.
    Ht.
    Sensitivity
    No. of Horiz.
    Vials
    Vial
    Material
    Material
    Color
    Each
    2 3/4"5/8"2 3/4"0.065"/1 ft., 19 min/0.1"2GlassCast IronBlack2212A52000000
     

    Fixture Columns

    Clamp multiple parts or fixtures to these columns to speed up your machining process. Also known as tombstones, they have multiple faces for building dense, efficient setups. Each face is precision-machined for accurate positioning. Made from cast iron, these columns are rigid enough to limit vibration and stabilize your workpieces during machining.
    Blank
    Image of Attribute. Front orientation. Contains Annotated. Fixture Columns, Blank, Square.
    Image of Attribute. Front orientation. Contains Annotated. Fixture Columns, Blank, Rectangle.
    Image of Attribute. Front orientation. Contains Annotated. Fixture Columns, Blank, Cross.

    Square

    Rectangle

    Cross

    Blank columns can be customized to fit your application. Machine them with your own holes, T-slots, or other mounting surfaces.
    Square—Square columns have four equal faces for balanced machining on each side.
    Rectangle—Rectangle columns have two wide faces for larger setups and two narrow faces for smaller ones. The narrow faces can also help reduce tool interference.
    Cross—Cross columns have four equal faces, similar to square columns, but cutouts at each corner give you more tool clearance.
    Column
    Base
    Mounting Holes
    Tolerance
    Lg.
    Wd.
    Ht.
    Overall
    Ht.
    Lg.
    Wd.
    Thk.
    No.
    of
    Style
    Ctr.-to-Ctr.
    For Mounting
    Screw Size
    Wt.,
    lb.
    Squareness
    Parallel
    Flatness
    Material
    Each
    Square
    8"8"22"22 1/2"15 3/4"15 3/4"1 1/2"8Slotted6"5/8"
    		3650.0008"0.0005"0.0005"Cast Iron9990N111000000000
    10"10"26"28"19 3/4"19 3/4"2"8Slotted8"5/8"
    		6150.0008"0.0005"0.0005"Cast Iron9990N11300000000
     
    Rectangle
    15 3/4"4"26"28"15 3/4"15 3/4"2"6Slotted6"5/8"
    		5400.0008"0.0005"0.0005"Cast Iron9990N11500000000
    19 3/4"4"26"28"19 3/4"19 3/4"2"6Slotted8"5/8"
    		7150.0008"0.0005"0.0005"Cast Iron9990N11700000000
     
    Cross
    10"10"26 1/2"28"15 3/4"15 3/4"1 1/2"8Slotted6"5/8"
    		5450.0008"0.0005"0.0005"Cast Iron9990N11900000000
     
    Grid
    Image of Attribute. Front orientation. Contains Annotated. Fixture Columns, Grid, Square.
    Image of Attribute. Front orientation. Contains Annotated. Fixture Columns, Grid, Rectangle.
    Image of Attribute. Front orientation. Contains Annotated. Fixture Columns, Grid, Cross.

    Square

    Rectangle

    Cross

    Grid columns have industry-standard hole patterns. The holes are lined with a precision bushing and a threaded insert to help locate fasteners, so you can clamp parts accurately and securely. Both are hardened to resist wear. These columns also come with a plastic chip plug for each hole—plug unused holes to keep debris from clogging them or causing damage.
    Square—Square columns have four equal faces for balanced machining on each side.
    Rectangle—Rectangle columns have two wide faces for larger setups and two narrow faces for smaller ones. The narrow faces can also help reduce tool interference.
    Cross—Cross columns have four equal faces, similar to square columns, but cutouts at each corner give you more tool clearance.
    Columns
    Aluminum
    Chip Plugs
    Replacement
    Plastic Chip Plugs
    Column
    Base
    Holes
    Mounting Holes
    Tolerance
    Lg.
    Wd.
    Ht.
    Overall
    Ht.
    Lg.
    Wd.
    Thk.
    No.
    of
    Thread
    Size
    Ctr.-to-Ctr.
    No.
    of
    Style
    Ctr.-to-Ctr.
    For Mounting
    Screw Size
    Wt.,
    lb.
    Squareness
    Parallel
    Flatness
    Material
    Each
    Each
    Each
    Square
    8"8"22"22 1/2"15 3/4"15 3/4"1 1/2"1321/2"-13
    		2"8Slotted6"5/8"
    		3550.0008"0.0005"0.0005"Cast Iron9990N1120000000003161N12000003161N1300000
    10"10"26"28"19 3/4"19 3/4"2"2081/2"-13
    		2"8Slotted8"5/8"
    		6000.0008"0.0005"0.0005"Cast Iron9990N114000000003161N1200003161N130000
     
    Rectangle
    15 3/4"4"26"28"15 3/4"15 3/4"2"2081/2"-13
    		2"6Slotted6"5/8"
    		5250.0008"0.0005"0.0005"Cast Iron9990N116000000003161N1200003161N130000
    19 3/4"4"26"28"19 3/4"19 3/4"2"2601/2"-13
    		2"6Slotted8"5/8"
    		6950.0008"0.0005"0.0005"Cast Iron9990N118000000003161N1200003161N130000
     
    Cross
    10"10"26 1/2"28"15 3/4"15 3/4"1 1/2"1561/2"-13
    		2"8Slotted6"5/8"
    		5350.0008"0.0005"0.0005"Cast Iron9990N121000000003161N1200003161N130000
     

    Two-Axis Precision Levels

    Image of Product. Front orientation. Levels. Two-Axis Precision Levels, Square.

    Square

    Level horizontal surfaces in two directions at the same time with the highest degree of accuracy. The highly sensitive glass vials on these levels sit perpendicular to one another – place them on the corner of platforms and surface plates to check if they’re tilting sideways, forwards, or backwards.
    Levels with Calibration Certificate—When precision readings are required for quality control or by regulation, use a level that includes a calibration certificate traceable to NIST. The certificate states that the level has passed a test for accuracy, so you can be confident your readings are correct and consistent.
    Cast Iron Base—Heavy cast iron keeps your level stable on surfaces and won't contract or expand in extreme temperatures.
    No. of
    Vials
    Housing
    Levels
    Levels with
    Calibration Certificate
    Lg.
    Wd.
    Ht.
    Sensitivity
    Horizontal
    Cross
    Check
    Vial
    Material
    Material
    Color
    Base
    Material
    Each
    Each
    Square
    8"1 9/16"8"0.0006"/1 ft., 0 min/0.1"11GlassCast IronBlueCast Iron2330A120000000002330A121000000000
     

    Two-Axis Surface-Mount Precision Levels

    Image of Product. Front orientation. Levels. Two-Axis Surface-Mount Precision Levels.
    Mount these levels onto CNC machines and other equipment for repeat horizontal level checks in two directions at the same time. With a highly sensitive glass vial and a heavy cast iron base for stability against surfaces, they detect even the smallest tilts backwards, forwards, or sideways, so you can correct them before they affect machine performance.
    Screw-On Levels—Fasten these levels to any drillable surface for the most secure mount that won't shake loose, even on vibrating equipment. Fasteners are not included.
    Housing
    Mounting
    Holes
    Lg.
    Wd.
    Ht.
    Sensitivity
    No. of Horiz.
    Vials
    Vial
    Material
    Material
    Color
    No.
    of
    Dia.
    Each
    Screw-On Levels
     
    Horizontal Surface Mount
    3 5/32"2 9/16"0.667"0.001"/1 ft., 0 min/0.1"2GlassCast IronSilver20.22"21665A310000000
     

    Ultra-Machinable Gray Iron Sheets

    Image of Product. Front orientation. Steel. Ultra-Machinable Gray Iron Sheets.
    Gray cast iron machines faster with less wear on cutting tools than most types of steel. It also absorbs vibration, so finished parts run quieter than those made of steel. It's often fabricated into gears, pulleys, and bushings.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Wd.
    Lg.,
    ft.
    Fabrication
    Yield
    Strength
    Hardness
    Max. Hardness After
    Heat Treatment
    Specs.
    Met
    Each
    2 5/8" Thick (0" to 0.125" Tolerance)
    2 5/8"1CastNot RatedRockwell C20 (Hard)Rockwell C50ASTM A2478923K3210000000
    2 5/8"2CastNot RatedRockwell C20 (Hard)Rockwell C50ASTM A2478923K322000000
     
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