McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    69 Products

    Staff Gauges

    Image of Product. Front orientation. ZoomedIn view. Staff Gauges. Staff Gauges.
    Built to resist corrosion and last in harsh environments, these vertical rulers are iron with a porcelain-enamel finish. Mount them to walls and tanks.
    Graduation
    Mounting
    Holes
    Length
    Front Right Graduation Marks
    (Numeric Increments)
    Wd.
    Thk.
    Color
    Color
    Type
    No.
    of.
    Dia.
    Each
    Inch—Bottom-to-Top Reading Direction
     
    Enamel-Coated Iron
    48"1/2" (1")2 1/2"1/16"WhiteBlackPrinted63/16"0000000000000
     

    Pipe Size Tape Measures

    Image of ProductInUse. Front orientation. Tape Measures. Pipe Size Tape Measures.
    Curl around pipe and pipe fittings to quickly determine their size—no math required. These tape measures are especially useful for measuring mounted pipe since you don’t need to take your system apart.
    Blade
    For Pipe Material
    For Pipe Size
    Wd.
    Material
    Each
    Galvanized Steel, Iron, PVC
    Copper, CPVC
    1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, 4, 5, 6, 8, 10, 12, 14, 16, 18
    1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1 1/8, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, 4, 5, 6, 8, 10, 12
    5/16"Plastic0000000000000
     

    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"0000000000000
    6"Built-In Level000000000000
    12" to 48"Built-In Level000000000000
    Replacement Square Head Lockbolts
    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"0000000000000
    6"000000000000
    12" to 48"000000000000
    Replacement Square Head Lockbolts
    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°)00000000000000
    12" to 48"YesBuilt-In Level0° to 180°1° (10°)0000000000000
    Replacement Square Head Lockbolts

    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"00000000000000
     
    Replacement Square Head Lockbolts
    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"00000000000000
     
    Replacement Square Head Lockbolts
    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"SteelSilverBlackEtched2 13/32"00000000000000
    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"0000000000000
    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"0000000000000
    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"0000000000000
    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"0000000000000
    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"0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"0000000000000
    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"0000000000000
     
    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"0000000000000
     
    Replacements for Squares
    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"00000000000000
     
    Replacements for Squares
    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"00000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"SteelSilverBlackEtched4 1/2"0000000000000
    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"0000000000000
     
    Replacements for Squares
    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"SteelSilverBlackEtched4 1/2"00000000000000———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"00000000000000
    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"SteelSilverBlackEtched4 1/2"0000000000000———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"0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"SteelSilverBlackEtched4 1/2"0000000000000———0
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"SteelSatinChrome, SilverBlackEtched———03 5/8"0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.006"1"3/32"SteelSatinChrome, SilverBlackEtched———03 5/8"0000000000000
    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"0000000000000———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"0000000000000
    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"0000000000000
     
    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"SteelSilverBlackEtched4 1/2"0000000000000———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"0000000000000
    23 1/2"/600 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.007"/
    -0.11 mm to 0.25 mm
    1"3/32"SteelSilverBlackEtched4 1/2"0000000000000———0
     
    Replacements for Squares

    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 Blade0000000000000
    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 Blade000000000000
    90°4"2 1/2"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")3/4"3/32"SilverBlackEtchedCast IronSatin000000000000
    90°6"2 1/2"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")3/4"3/32"SilverBlackEtchedCast IronSatin000000000000
     
    Replacement Square Head Lockbolts

    Long-Length Staff Gauges

    Image of Product. Front orientation. ZoomedIn view. Staff Gauges. Long-Length Staff Gauges.
    Connect continuous segments to create a ruler up to 10 ft. long. Built to resist corrosion and last in harsh environments, these vertical rulers are iron with a porcelain-enamel finish. Mount them to walls and tanks.
    Graduation
    Mounting
    Holes
    Lg. Measured
    Range, ft.
    Length
    Front Right Graduation Marks
    (Numeric Increments)
    Wd.
    Thk.
    Color
    Color
    Type
    No.
    of.
    Dia.
    Each
    Inch—Bottom-to-Top Reading Direction
     
    Enamel-Coated Iron
    0 to 3.333.33 ft.1/100" (1/10 ft.)2 1/2"1/16"WhiteBlackPrinted53/16"0000000000000
    3.33 to 6.663.33 ft.1/100" (1/10 ft.)2 1/2"1/16"WhiteBlackPrinted53/16"000000000000
    6.66 to 103.33 ft.1/100" (1/10 ft.)2 1/2"1/16"WhiteBlackPrinted53/16"000000000000
     

    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, Micrometer311-2150000000000000000
    0 to 250±0.003 mm0.0020.0090.0035Cast IronAluminum
    7"4"Dial Indicator, Micrometer311-225000000000000000
    0 to 450±0.003 mm0.0020.0060.0025Cast IronAluminum
    7"4"Dial Indicator, Micrometer311-245000000000000000

    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"00000000000000
     

    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"000000000000000000000000000000
     
    Replacement Square Head Lockbolts
    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"000000000000000000000000000000
     
    Replacement Square Head Lockbolts
    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"000000000000000000000000000000
     
    Replacement Square Head Lockbolts

    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 Level000000000000000000000000000
     
    Hardened Cast Iron
    12" to 24"Built-In Level0000000000000000000000000
     
    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"000000000000000000000000000
     
    Hardened Cast Iron
    12" to 24"0000000000000000000000000
     
    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°)000000000000000000000000000
     

    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"000000000000000
     
    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"000000000000000
     
    back to top