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

    SAE Washers

    Originally designed for the automotive industry, these washers conform to SAE sizing standards. They generally have smaller diameters than USS washers to fit in cramped spots and are thinner to create more precise gaps. Washers distribute pressure under screws and nuts to protect your mounting surface.
    Steel
    Image of Product. Front orientation. Washers. SAE Washers.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Material Certificate—Washers include a report with a traceable lot number.
    For Fastener Strength Grade/Class—If you require screws or nuts with a specific fastener strength rating, make sure your washer matches the grade or class.
    For Screw
    Size
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    No. 4
    0.125"0.312"0.025" to 0.040"SAE Grade 5
    10090126A21700000
    No. 6
    0.156"0.375"0.036" to 0.065"SAE Grade 5
    Material Certificate
    10090126A2030000
    No. 8
    0.188"0.438"0.036" to 0.065"SAE Grade 5
    10090126A2040000
    No. 10
    0.219"0.500"0.036" to 0.065"SAE Grade 5
    10090126A2050000
    No. 12
    0.250"0.562"0.051" to 0.080"SAE Grade 5
    5090126A2180000
    1/4"
    0.281"0.625"0.051" to 0.080"SAE Grade 5
    Material Certificate
    5090126A2060000
    5/16"
    0.344"0.688"0.051" to 0.080"SAE Grade 5
    Material Certificate
    5090126A2070000
    3/8"
    0.406"0.812"0.051" to 0.080"SAE Grade 5
    Material Certificate
    5090126A2080000
    7/16"
    0.469"0.922"0.051" to 0.080"SAE Grade 5
    Material Certificate
    5090126A20900000
    1/2"
    0.531"1.062"0.074" to 0.121"SAE Grade 5
    1090126A2110000
    9/16"
    0.594"1.156"0.074" to 0.121"SAE Grade 5
    590126A2190000
    5/8"
    0.656"1.312"0.074" to 0.121"SAE Grade 5
    Material Certificate
    1090126A2120000
    3/4"
    0.812"1.469"0.108" to 0.160"SAE Grade 5
    Material Certificate
    590126A21300000
    7/8"
    0.938"1.750"0.108" to 0.160"SAE Grade 5
    Material Certificate
    190126A2140000
    1"
    1.062"2.000"0.108" to 0.160"SAE Grade 5
    Material Certificate
    190126A2150000
    1 1/8"
    1.250"2.250"0.108" to 0.160"SAE Grade 5
    190126A2210000
    1 1/4"
    1.375"2.500"0.136" to 0.192"SAE Grade 5
    190126A2160000
    1 1/2"
    1.625"3.000"0.136" to 0.192"SAE Grade 5
    Material Certificate
    190126A2220000
     

    ASME Washers

    Also known as Type B washers, these meet ASME sizing standards. They take the pressure off screws and nuts to protect your mounting surface.
    Steel
    Image of Product. Front orientation. Washers. ASME Washers.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Material Certificate—Washers include a report with a traceable lot number.
    For Fastener Strength Grade/Class—If you require screws or nuts with a specific fastener strength rating, make sure your washer matches the grade or class.
    For Screw
    Size
    ASME
    Designation
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    No. 10
    Narrow0.203"0.406"0.036" to 0.045"SAE Grade 5
    ASME B18.21.110094744A515000000
    1/4"
    Narrow0.281"0.500"0.056" to 0.071"SAE Grade 5
    ASME B18.21.1Material Certificate
    5094744A51600000
    1/4"
    Regular0.281"0.734"0.056" to 0.071"SAE Grade 5
    ASME B18.21.15094744A51700000
    1/4"
    Wide0.281"1.000"0.056" to 0.071"SAE Grade 5
    ASME B18.21.12594744A51800000
    5/16"
    Narrow0.344"0.625"0.056" to 0.071"SAE Grade 5
    ASME B18.21.15094744A51900000
    5/16"
    Regular0.344"0.875"0.056" to 0.071"SAE Grade 5
    ASME B18.21.12594744A52100000
    3/8"
    Narrow0.406"0.734"0.056" to 0.071"SAE Grade 5
    ASME B18.21.15094744A52200000
    3/8"
    Regular0.406"1.000"0.056" to 0.071"SAE Grade 5
    ASME B18.21.12594744A52300000
    3/8"
    Wide0.406"1.250"0.090" to 0.112"SAE Grade 5
    ASME B18.21.1Material Certificate
    1094744A52400000
    1/2"
    Narrow0.531"1.000"0.056" to 0.071"SAE Grade 5
    ASME B18.21.12594744A52500000
    1/2"
    Regular0.531"1.250"0.090" to 0.112"SAE Grade 5
    ASME B18.21.11094744A52600000
    1/2"
    Wide0.531"1.750"0.090" to 0.112"SAE Grade 5
    ASME B18.21.1594744A52700000
    5/8"
    Narrow0.656"1.250"0.090" to 0.112"SAE Grade 5
    ASME B18.21.11094744A52800000
    5/8"
    Regular0.656"1.750"0.090" to 0.112"SAE Grade 5
    ASME B18.21.1594744A52900000
    3/4"
    Narrow0.812"1.375"0.090" to 0.112"SAE Grade 5
    ASME B18.21.11094744A53100000
    3/4"
    Regular0.812"2.000"0.090" to 0.112"SAE Grade 5
    ASME B18.21.1194744A5320000
    1"
    Narrow1.062"1.750"0.090" to 0.112"SAE Grade 5
    ASME B18.21.1594744A53300000
     

    USS Washers

    These washers meet USS sizing specifications and typically have larger diameters than SAE washers. As a result, they accommodate larger screws and nuts and distribute pressure across a wider surface area. They are also thicker, so they withstand heavier loads and span wider gaps when used as spacers.
    Steel
    Image of Product. Front orientation. Washers. USS Washers.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Material Certificate—Washers include a report with a traceable lot number.
    For Fastener Strength Grade/Class—If you require screws or nuts with a specific fastener strength rating, make sure your washer matches the grade or class.
    For Screw
    Size
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"
    0.313"0.750"0.051" to 0.080"SAE Grade 5
    5090108A171000000
    5/16"
    0.375"0.875"0.064" to 0.104"SAE Grade 5
    ASME B18.21.12590108A17200000
    3/8"
    0.438"1.000"0.064" to 0.104"SAE Grade 5
    ASME B18.21.11090108A1730000
    1/2"
    0.563"1.375"0.086" to 0.132"SAE Grade 5
    ASME B18.21.1Material Certificate
    1090108A17400000
    5/8"
    0.688"1.750"0.108" to 0.160"SAE Grade 5
    ASME B18.21.1Material Certificate
    590108A17500000
    3/4"
    0.813"2.000"0.122" to 0.177"SAE Grade 5
    ASME B18.21.1190108A1760000
     

    Steel Hex Head Screw Kits

    Image of Product. Front orientation. Hex Head Screws. Steel Hex Head Screw Kits.
    Image of Product. Front orientation. Hex Head Screws. Steel Hex Head Screw Kits, Fully Threaded.
    Image of Product. Front orientation. Hex Head Screws. Steel Hex Head Screw Kits, Partially Threaded.

    Fully Threaded

    Partially

    Threaded

    Everything you need for a complete, strong joint—the screws in these kits come with compatible nuts and washers. The screws have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive. Washers distribute pressure on both sides of your material, so the nut tightens onto the screw without damaging surfaces.
    Screw length is measured from under the head.
    Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Screw
    Nut
    Washer
    Lg.
    Head
    Wd.
    Head
    Ht.
    Threading
    Thread
    Spacing
    Fastener Strength
    Grade/Class
    Tensile Strength,
    psi
    Wd.
    Ht.
    Fastener Strength
    Grade/Class
    ID
    OD
    Thk.
    Includes
    Pkg.
    Qty.
    Pkg.
    Medium-Strength Zinc-Plated Steel
     
    1/4"-20
    1/2"7/16"5/32"Fully ThreadedCoarse
    SAE Grade 5
    120,0007/16"7/32"SAE Grade 5
    0.281"0.625"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12400000
    3/4"7/16"5/32"Fully ThreadedCoarse
    SAE Grade 5
    120,0007/16"7/32"SAE Grade 5
    0.281"0.625"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A1260000
    1"7/16"5/32"Fully ThreadedCoarse
    SAE Grade 5
    120,0007/16"7/32"SAE Grade 5
    0.281"0.625"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12300000
    1 1/4"7/16"5/32"Fully ThreadedCoarse
    SAE Grade 5
    120,0007/16"7/32"SAE Grade 5
    0.281"0.625"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12200000
    1 1/2"7/16"5/32"Partially ThreadedCoarse
    SAE Grade 5
    120,0007/16"7/32"SAE Grade 5
    0.281"0.625"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12100000
    2"7/16"5/32"Partially ThreadedCoarse
    SAE Grade 5
    120,0007/16"7/32"SAE Grade 5
    0.281"0.625"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12500000
     
    5/16"-18
    3/4"1/2"13/64"Fully ThreadedCoarse
    SAE Grade 5
    120,0001/2"17/64"SAE Grade 5
    0.343"0.687"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A13100000
    1"1/2"13/64"Fully ThreadedCoarse
    SAE Grade 5
    120,0001/2"17/64"SAE Grade 5
    0.343"0.687"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12900000
    1 1/4"1/2"13/64"Fully ThreadedCoarse
    SAE Grade 5
    120,0001/2"17/64"SAE Grade 5
    0.343"0.687"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12800000
    1 1/2"1/2"13/64"Partially ThreadedCoarse
    SAE Grade 5
    120,0001/2"17/64"SAE Grade 5
    0.343"0.687"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A12700000
     
    3/8"-16
    1"9/16"15/64"Fully ThreadedCoarse
    SAE Grade 5
    120,0009/16"21/64"SAE Grade 5
    0.406"0.812"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A13500000
    1 1/4"9/16"15/64"Fully ThreadedCoarse
    SAE Grade 5
    120,0009/16"21/64"SAE Grade 5
    0.406"0.812"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A13300000
    1 1/2"9/16"15/64"Partially ThreadedCoarse
    SAE Grade 5
    120,0009/16"21/64"SAE Grade 5
    0.406"0.812"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A13200000
    1 3/4"9/16"15/64"Partially ThreadedCoarse
    SAE Grade 5
    120,0009/16"21/64"SAE Grade 5
    0.406"0.812"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw2597375A13400000
    2"9/16"15/64"Partially ThreadedCoarse
    SAE Grade 5
    120,0009/16"21/64"SAE Grade 5
    0.406"0.812"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A1370000
    2 1/2"9/16"15/64"Partially ThreadedCoarse
    SAE Grade 5
    120,0009/16"21/64"SAE Grade 5
    0.406"0.812"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A13600000
    3"9/16"15/64"Partially ThreadedCoarse
    SAE Grade 5
    120,0009/16"21/64"SAE Grade 5
    0.406"0.812"0.065"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A13800000
     
    1/2"-13
    1"3/4"5/16"Fully ThreadedCoarse
    SAE Grade 5
    120,0003/4"7/16"SAE Grade 5
    0.531"1.062"0.095"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A14100000
    1 1/2"3/4"5/16"Partially ThreadedCoarse
    SAE Grade 5
    120,0003/4"7/16"SAE Grade 5
    0.531"1.062"0.095"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A13900000
    2"3/4"5/16"Partially ThreadedCoarse
    SAE Grade 5
    120,0003/4"7/16"SAE Grade 5
    0.531"1.062"0.095"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A14300000
    2 1/2"3/4"5/16"Partially ThreadedCoarse
    SAE Grade 5
    120,0003/4"7/16"SAE Grade 5
    0.531"1.062"0.095"One Hex Nut and Two Flat Washers per Hex Head Screw1097375A14200000
    3"3/4"5/16"Partially ThreadedCoarse
    SAE Grade 5
    120,0003/4"7/16"SAE Grade 5
    0.531"1.062"0.095"One Hex Nut and Two Flat Washers per Hex Head Screw597375A14400000
     

    Steel Hex Head Screw, Nut, and Washer Assortments

    Image of Product. Front orientation. Hex Head Screws. Steel Hex Head Screw, Nut, and Washer Assortments.
    Keep a range of hex head screw, nut, and washer sizes on hand for a variety of jobs. The screws in these assortments have heads with six flat sides to keep wrenches and sockets slipping and rounding off the drive.
    Length is measured from under the head.
    Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    No. of
    Pieces
    Hex Head Screws Included
    Hex Nuts Included
    Split Lock Washers Included
    Flat Washers Included
    Fastener Strength
    Grade/Class
    Container Type
    Each
    Medium-Strength Zinc-Plated Steel
    2651/2"-13 Thread: 1", 1 1/4", 1 1/2", 1 3/4", 2", 2 1/2", 3", 3 1/2", and 4" Lg. (90 Pieces)1/2"-13 Thread (50 Pieces)For 1/2" Screw Size (60 Pieces)For 1/2" Screw Size (65 pieces)SAE Grade 5
    Metal Box91340A1160000000
    5553/8"-16 Thread: 3/4", 1", 1 1/4", 1 1/2", 1 3/4", 2", 2 1/2", 3", and 3 1/2" Lg. (175 Pieces)3/8"-16 Thread (120 Pieces)For 3/8" Screw Size (80 Pieces)For 3/8" Screw Size (180 pieces)SAE Grade 5
    Metal Box91340A115000000
    5655/16"-18 Thread: 1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", and 3 1/2" Lg. (215 Pieces)5/16"-18 Thread (80 Pieces)For 5/16" Screw Size (120 Pieces)For 5/16" Screw Size (150 pieces)SAE Grade 5
    Metal Box91340A114000000
    6151/4"-20 Thread: 1/2", 5/8", 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2", and 3" Lg. (200 Pieces)1/4"-20 Thread (140 Pieces)For 1/4" Screw Size (85 Pieces)For 1/4" Screw Size (190 pieces)SAE Grade 5
    Metal Box91340A11300000
    9101/4"-20 Thread: 1/2", 3/4", 1", 1 1/2", and 2" Lg. (115 Pieces)
    5/16"-18 Thread: 3/4", 1", 1 1/4", 1 1/2", and 2" Lg. (100 Pieces)
    3/8"-16 Thread: 3/4", 1", 1 1/4", 1 1/2", and 2" Lg. (70 Pieces)
    1/4"-20 Thread (50 Pieces)
    5/16"-18 Thread (50 Pieces)
    3/8"-16 Thread (25 Pieces)
    For 1/4" Screw Size (100 Pieces)
    For 5/16" Screw Size (100 Pieces)
    For 3/8" Screw Size (50 Pieces)
    For 1/4" Screw Size (100 Pieces)
    For 5/16" Screw Size (100 Pieces)
    For 3/8" Screw Size (50 Pieces)
    SAE Grade 5
    Metal Box91340A112000000
    9101/4"-28 Thread: 1/2", 3/4", 1", 1 1/2", and 2" Lg. (115 Pieces)
    5/16"-24 Thread: 3/4", 1", 1 1/4", 1 1/2", and 2" Lg. (100 Pieces)
    3/8"-24 Thread: 3/4", 1", 1 1/4", 1 1/2", and 2" Lg. (70 Pieces)
    1/4"-28 Thread (50 Pieces)
    5/16"-24 Thread (50 Pieces)
    3/8"-24 Thread (25 Pieces)
    For 1/4" Screw Size (100 Pieces)
    For 5/16" Screw Size (100 Pieces)
    For 3/8" Screw Size (50 Pieces)
    For 1/4" Screw Size (100 Pieces)
    For 5/16" Screw Size (100 Pieces)
    For 3/8" Screw Size (50 Pieces)
    SAE Grade 5
    Metal Box91340A111000000
    1,0201/4"-20 Thread: 3/4", 1", 1 1/2", 2", and 2 1/2" Lg. (100 Pieces)
    5/16"-18 Thread: 3/4", 1", 1 1/2", 2", and 2 1/2" Lg. (90 Pieces)
    3/8"-16 Thread: 1", 1 1/2", 2", 2 1/2", and 3" Lg. (55 Pieces)
    7/16"-14 Thread: 1", 1 1/2", 2", 2 1/2", and 3" Lg. (40 Pieces)
    1/2"-13 Thread: ", 1 1/2", 2", 2 1/2", and 3" Lg. (30 Pieces)
    1/4"-20 Thread (50 Pieces)
    5/16"-18 Thread (50 Pieces)
    3/8"-16 Thread (25 Pieces)
    7/16"-14 Thread (20 Pieces)
    1/2"-13 Thread (10 Pieces)
    For 1/4" Screw Size (50 Pieces)
    For 5/16" Screw Size (50 Pieces)
    For 3/8" Screw Size (50 Pieces)
    For 7/16" Screw Size (50 Pieces)
    For 1/2" Screw Size (25 Pieces)
    For 1/4" Screw Size (100 Pieces)
    For 5/16" Screw Size (100 Pieces)
    For 3/8" Screw Size (50 Pieces)
    For 7/16" Screw Size (50 Pieces)
    For 1/2" Screw Size (25 Pieces)
    SAE Grade 5
    Metal Drawer Cabinet91308A220000000
     
    back to top