McMaster-Carr logo
    Filter by
    System of Measurement
    Number of Pairs
    Number of Precision-Ground Sides
    Number of Pieces
    Number of Holes
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Material
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    19 Products

    Sets of Parallels

    Keep multiple sizes of matched pairs on hand in one protective case. These parallels elevate, support, and align workpieces in machining, grinding, and inspection setups. They are precision ground to ensure accurate positioning in vises while providing additional clearance for cutting tools. Durable and wear resistant, parallels are made of hardened steel. They’re a rugged solution for shop-floor setups and heavy duty applications. To use, place a parallel against each vise jaw and rest the workpiece on top. You can also use them as reference surfaces for measurement and alignment.
    Inch
    Image of Product. Front orientation. Parallels. Sets of Parallels, Straight.
    Image of Product. Front orientation. Parallels. Sets of Parallels, Wave.

    Straight

    Wave

    Wave—These parallels make continuous contact that's spread across multiple points. They support thin, irregular, and soft workpieces without damaging them. The wave shape also creates space for chips and debris to fall away.
    2 Precision-Ground Sides—Precision ground on the top and bottom edges.
    4 Precision-Ground Sides—Precision ground on the top edge, bottom edge, and both faces.
    Tolerance
    No. of
    Pairs
    Lg.
    Thk.
    Ht.
    Ht.
    Parallel
    Material
    Container
    Type
    Each
    Straight
     
    2 Precision-Ground Sides
    46"3/16"1", 1 1/4", 1 1/2", 1 3/4"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelWood Case0000000000000
    46"1/2"1", 1 1/4", 1 1/2", 1 3/4"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelWood Case000000000000
    76"1/2"7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 5/8", 1 3/4"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelWood Case0000000000000
    86"1/4"3/4", 7/8", 1", 1 1/8", 1 3/8", 1 1/2", 1 5/8", 1 3/4"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelPlastic Case0000000000000
    96"1/4"3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened SteelWood Case0000000000000
    96"1/4"15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8", 1 7/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened SteelWood Case0000000000000
    104"1/8"1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelWood Case0000000000000
    106"1/8"1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8"-0.001" to 0.001"-0.0004" to 0.0004"Hardened SteelPlastic Case00000000000000
    206"1/32"1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8", 1 7/16", 1 1/2", 1 9/16", 1 5/8", 1 11/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened SteelPlastic Case00000000000
    226"1/4"1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8", 1 7/16", 1 1/2", 1 9/16", 1 5/8", 1 11/16", 1 3/4", 1 13/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened SteelWood Case000000000000000
     
    4 Precision-Ground Sides
    96"1/4"3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8", 1 3/4"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelPlastic Case00000000000000
    98"1/4"1", 1 1/4", 1 3/8", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 2", 2 1/8"-0.0001" to 0.0001"-0.0001" to 0.0001"Hardened SteelPlastic Case0000000000000
    106"1/32"1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8"-0.0001" to 0.0001"-0.0001" to 0.0001"Hardened SteelPlastic Case00000000000000
    106"1/8"1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8"-0.001" to 0.001"-0.0002" to 0.0002"Hardened SteelPlastic Case00000000000000
     
    Wave
     
    2 Precision-Ground Sides
    94 1/4"1/8"1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelWood Case00000000000000
     
    Metric
    Image of Product. Front orientation. Parallels. Sets of Parallels, Straight.

    Straight

    2 Precision-Ground Sides—Precision ground on the top and bottom edges.
    Tolerance,
    mm
    No. of
    Pairs
    Lg.,
    mm
    Thk.
    Ht.
    Ht.
    Parallel
    Material
    Container
    Type
    Each
    Straight
     
    2 Precision-Ground Sides
    201002 mm
    3 mm
    4 mm
    5 mm
    6 mm    		5 mm, 10 mm, 15 mm, 20 mm
    6 mm, 11 mm, 16 mm, 21 mm
    7 mm, 12 mm, 17 mm, 22 mm
    8 mm, 13 mm, 18 mm, 23 mm
    9 mm, 14 mm, 19 mm, 24 mm    		-0.1 to 0.1-0.01 to 0.01Hardened SteelWood Stand0000000000000000
     

    Sets of Adjustable Parallels

    Adjust these two-piece parallels to your exact height requirements. Loosen the one or two screws and slide the pieces in and out. When the desired height is achieved, tighten the screws. Parallels are precision ground and often used in pairs. Place a parallel against each vise jaw and rest your workpiece on top to raise it within the vise, allowing more clearance for cutting tools. Parallels also function as adjustable gauges for layout, setup, and inspection tasks.
    Inch
    Image of Product. Front orientation. Parallels. Sets of Adjustable Parallels.
    Image of Product. Front orientation. Parallels. Sets of Adjustable Parallels.
    2 Precision-Ground Sides—Precision ground on the top and bottom edges.
    4 Precision-Ground Sides—Precision ground on the top edge, bottom edge, and both faces.
    No. of
    Pieces
    Includes
    Thk.
    Material
    Container
    Type
    Each
    Starrett Parallels
     
    2 Precision-Ground Sides
    4One 3/8" to 1/2" High Parallel (1 3/4" Length)—±0.001" Tolerance
    One 1/2" to 11/16" High Parallel (2 1/8" Length)—±0.001" Tolerance
    One 11/16" to 15/16" High Parallel (2 11/16" Length)—±0.001" Tolerance
    One 15/16" to 1 5/16" High Parallel (3 9/16" Length)—±0.001" Tolerance    		9/32"SteelPlastic Pouch00000000000000
    6One 3/8" to 1/2" High Parallel (1 3/4" Length)—±0.001" Tolerance
    One 1/2" to 11/16" High Parallel (2 1/8" Length)—±0.001" Tolerance
    One 11/16" to 15/16" High Parallel (2 11/16" Length)—±0.001" Tolerance
    One 15/16" to 1 5/16" High Parallel (3 9/16" Length)—±0.001" Tolerance
    One 1 5/16" to 1 3/4" High Parallel (4 3/16" Length)—±0.001" Tolerance
    One 1 3/4" to 2 1/4" High Parallel (5 1/16" Length)—±0.001" Tolerance    		9/32"SteelPlastic Pouch0000000000000
     
    Other Parallels
     
    4 Precision-Ground Sides
    6One 3/8" to 1/2" High Parallel (6" Length)—0.0005" Tolerance
    One 1/2" to 11/16" High Parallel (6" Length)—0.0005" Tolerance
    One 11/16" to 15/16" High Parallel (6" Length)—0.0006" Tolerance
    One 15/16" to 1 15/16" High Parallel (6" Length)—0.0006" Tolerance
    One 1 5/16" to 1 3/4" High Parallel (6" Length)—0.0009" Tolerance
    One 1 3/4" to 2 1/4" High Parallel (6" Length)—0.0009" Tolerance    		1/8"SteelPlastic Pouch0000000000000
     
    back to top