McMaster-Carr logo
    Filter by
    System of Measurement
    Number of Holes
    Number of Pairs
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    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)
    68 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.
    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 Case8644A21000000
    46"1/2"1", 1 1/4", 1 1/2", 1 3/4"-0.0002" to 0.0002"-0.0002" to 0.0002"Hardened SteelPlastic Case8644A23000000
    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 SteelPlastic Case8644A32000000
    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 Case8644A43000000
    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 Case8642A67000000
    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 Case8642A68000000
    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 Case86425A65000000
    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 Case8644A700000
    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 Case8642A6100000000
     
    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 Case86425A81000000
     
    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 Stand8642A71000000000
     

    Parallels

    Image of Product. Front orientation. Parallels.
    Elevate, support, and align workpieces in machining, grinding, and inspection setups. These parallels are precision ground to ensure accurate positioning in vises while providing additional clearance for cutting tools. Made of hardened steel, they withstand the wear and tear of 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 these parallels as reference surfaces for measurement and alignment.
    2 Precision-Ground Sides—Precision ground on the top and bottom edges.
    Tolerance
    Lg.
    Thk.
    Ht.
    Ht.
    Parallel
    Material
    Pair
     
    2 Precision-Ground Sides
    6"1/32"1/2"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A211000000
    6"1/32"9/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A21200000
    6"1/32"5/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A21300000
    6"1/32"11/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A21400000
    6"1/32"3/4"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A21500000
    6"1/32"13/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A21600000
    6"1/32"7/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A21700000
    6"1/32"15/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22100000
    6"1/32"1"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22200000
    6"1/32"1 1/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22300000
    6"1/32"1 1/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22400000
    6"1/32"1 3/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22500000
    6"1/32"1 1/4"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22600000
    6"1/32"1 5/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22700000
    6"1/32"1 3/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A22800000
    6"1/32"1 7/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A23100000
    6"1/32"1 1/2"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A23200000
    6"1/32"1 9/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A23300000
    6"1/32"1 5/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A23400000
    6"1/32"1 11/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A23500000
    6"1/8"1/2"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51100000
    6"1/8"5/8"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51200000
    6"1/8"3/4"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51300000
    6"1/8"7/8"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51400000
    6"1/8"1"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51500000
    6"1/8"1 1/8"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51600000
    6"1/8"1 1/4"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51700000
    6"1/8"1 3/8"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51800000
    6"1/8"1 1/2"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A51900000
    6"1/8"1 5/8"-0.001" to 0.001"-0.0002" to 0.0002"Hardened Steel8642A52100000
    6"1/4"3/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3100000
    6"1/4"7/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A31100000
    6"1/4"1/2"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3200000
    6"1/4"9/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3300000
    6"1/4"5/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A33100000
    6"1/4"11/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A33200000
    6"1/4"3/4"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3400000
    6"1/4"13/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A34100000
    6"1/4"7/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3500000
    6"1/4"15/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A35100000
    6"1/4"1"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3600000
    6"1/4"1 1/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3700000
    6"1/4"1 1/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3800000
    6"1/4"1 3/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A3900000
    6"1/4"1 1/4"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A400000
    6"1/4"1 5/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A40100000
    6"1/4"1 3/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4100000
    6"1/4"1 7/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A41100000
    6"1/4"1 1/2"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4200000
    6"1/4"1 9/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4300000
    6"1/4"1 5/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4400000
    6"1/4"1 11/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A44100000
    6"1/4"1 3/4"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4500000
    6"1/4"1 13/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4600000
    6"1/4"1 7/8"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4700000
    6"1/4"1 15/16"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4800000
    6"1/4"2"-0.001" to 0.001"-0.0001" to 0.0001"Hardened Steel8642A4900000
     
    back to top