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    192 Products

    Mil. Spec. Washers
    3D CAD models available

    These washers are manufactured and tested to strict U.S. military standards for material and construction. They take the pressure off screws and nuts to protect mounting surfaces.
    Stainless SteelAbout Stainless Steel
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these washers resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    No. 2
    0.099"0.250"0.014" to 0.018"AN960-C2LNAS1149-CN216R500000000000000000
    No. 2
    0.099"0.250"0.028" to 0.036"AN960-C2NAS1149-CN232R50000000000000000
    No. 3
    0.105"0.250"0.014" to 0.018"AN960-C3LNAS1149-CN316R50000000000000000
    No. 3
    0.105"0.250"0.028" to 0.036"AN960-C3NAS1149-CN332R50000000000000000
    No. 4
    0.125"0.312"0.014" to 0.018"AN960-C4LNAS1149-CN416R50000000000000000
    No. 4
    0.125"0.312"0.028" to 0.036"AN960-C4ASME B18.21.1, NAS1149-CN432R50000000000000000
    No. 5
    0.140"0.438"0.028" to 0.036"__NAS1149-CN532R10000000000000000
    No. 5
    0.140"0.438"0.037" to 0.047"AN960-C5NAS1149-CN542R10000000000000000
    No. 6
    0.149"0.375"0.014" to 0.018"AN960-C6LNAS1149-CN616R50000000000000000
    No. 6
    0.149"0.375"0.028" to 0.036"AN960-C6NAS1149-CN632R50000000000000000
    No. 8
    0.174"0.375"0.014" to 0.018"AN960-C8LNAS1149-CN816R50000000000000000
    No. 8
    0.174"0.375"0.028" to 0.036"AN960-C8NAS1149-CN832R50000000000000000
    No. 10
    0.203"0.438"0.028" to 0.036"AN960-C10LNAS1149-C0332R25000000000000000
    No. 10
    0.203"0.438"0.057" to 0.069"AN960-C10NAS1149-C0363R25000000000000000
    1/4"
    0.265"0.500"0.028" to 0.036"AN960-C416LNAS1149-C0432R25000000000000000
    1/4"
    0.265"0.500"0.057" to 0.069"AN960-C416NAS1149-C0463R10000000000000000
    5/16"
    0.328"0.562"0.028" to 0.036"AN960-C516LNAS1149-C0532R10000000000000000
    5/16"
    0.328"0.562"0.057" to 0.069"AN960-C516NAS1149-C0563R10000000000000000
    3/8"
    0.390"0.625"0.028" to 0.036"AN960-C616LNAS1149-C0632R10000000000000000
    3/8"
    0.390"0.625"0.057" to 0.069"AN960-C616NAS1149-C0663R10000000000000000
    3/8"
    0.390"0.625"0.082" to 0.098"__NAS1149-C0690R2500000000000000
    7/16"
    0.453"0.750"0.028" to 0.036"AN960-C716LNAS1149-C0732R10000000000000000
    7/16"
    0.453"0.750"0.057" to 0.069"AN960-C716NAS1149-C0763R2500000000000000
    7/16"
    0.453"0.750"0.082" to 0.098"__NAS1149-C0790R1000000000000000
    1/2"
    0.515"0.875"0.028" to 0.036"AN960-C816LNAS1149-C0832R10000000000000000
    1/2"
    0.515"0.875"0.057" to 0.069"AN960-C816NAS1149-C0863R5000000000000000
    1/2"
    0.515"0.875"0.082" to 0.098"__NAS1149-C0890R500000000000000
    9/16"
    0.578"1.062"0.028" to 0.036"AN960-C916LNAS1149-C0932R2500000000000000
    9/16"
    0.578"1.062"0.057" to 0.069"AN960-C916NAS1149-C0963R2500000000000000
    5/8"
    0.640"1.188"0.028" to 0.036"AN960-C1016LNAS1149-C1032R2500000000000000
    5/8"
    0.640"1.188"0.057" to 0.069"AN960-C1016NAS1149-C1063R2500000000000000
    3/4"
    0.765"1.312"0.028" to 0.036"AN960-C1216LNAS1149-C1232R2500000000000000
    3/4"
    0.765"1.312"0.082" to 0.098"AN960-C1216NAS1149-C1290R1000000000000000
    7/8"
    0.890"1.500"0.028" to 0.036"AN960-C1416LNAS1149-C1432R1000000000000000
    7/8"
    0.890"1.500"0.082" to 0.098"AN960-C1416NAS1149-C1490R1000000000000000
    1"
    1.015"1.750"0.028" to 0.036"AN960-C1616LNAS1149-C1632R1000000000000000
    1"
    1.015"1.750"0.082" to 0.098"AN960-C1616NAS1149-C1690R500000000000000
    1 1/8"
    1.140"1.875"0.028" to 0.036"AN960-C1816LNAS1149-C1832R1000000000000000
    1 1/8"
    1.140"1.875"0.082" to 0.098"AN960-C1816NAS1149-C1890R500000000000000
    1 1/4"
    1.265"2.000"0.028" to 0.036"AN960-C2016LNAS1149-C2032R500000000000000
    1 1/4"
    1.265"2.000"0.082" to 0.098"AN960-C2016NAS1149-C2090R100000000000000
    1 1/2"
    1.515"2.250"0.028" to 0.036"__NAS1149-C2432R10000000000000
    1 1/2"
    1.515"2.250"0.082" to 0.098"__NAS1149-C2490R100000000000000
     
    Steel
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    Low-Friction Cadmium-Plated Steel—The plating reduces friction between the washer, fastener, and mounting surface to prevent sticking when fastening and loosening. It also creates a barrier against rust that's comparable to zinc yellow-chromate plating.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Low-Friction Cadmium-Plated Steel
    No. 2
    0.099"0.250"0.029" to 0.035"AN960-2NAS1149-FN232P10000000000000000
    No. 4
    0.125"0.312"0.014" to 0.018"AN960-4LNAS1149-FN416P1000000000000000
    No. 4
    0.125"0.312"0.029" to 0.035"AN960-4ASME B18.21.1, NAS1149-FN432P1000000000000000
    No. 6
    0.149"0.375"0.014" to 0.018"AN960-6LNAS1149-FN616P1000000000000000
    No. 6
    0.149"0.375"0.029" to 0.035"AN960-6NAS1149-FN632P1000000000000000
    No. 8
    0.174"0.375"0.014" to 0.018"AN960-8LNAS1149-FN816P1000000000000000
    No. 8
    0.174"0.375"0.029" to 0.035"AN960-8NAS1149-FN832P1000000000000000
    No. 10
    0.203"0.438"0.029" to 0.035"AN960-10LNAS1149-F0332P1000000000000000
    No. 10
    0.203"0.438"0.059" to 0.067"AN960-10NAS1149-F0363P1000000000000000
    1/4"
    0.265"0.500"0.029" to 0.035"AN960-416LNAS1149-F0432P1000000000000000
    1/4"
    0.265"0.500"0.059" to 0.067"AN960-416NAS1149-F0463P1000000000000000
    5/16"
    0.328"0.562"0.029" to 0.035"AN960-516LNAS1149-F0532P1000000000000000
    5/16"
    0.328"0.562"0.059" to 0.067"AN960-516NAS1149-F0563P1000000000000000
    3/8"
    0.390"0.625"0.029" to 0.035"AN960-616LNAS1149-F0632P1000000000000000
    3/8"
    0.390"0.625"0.059" to 0.067"AN960-616NAS1149-F0663P10000000000000000
    7/16"
    0.453"0.750"0.029" to 0.035"AN960-716LNAS1149-F0732P10000000000000000
    7/16"
    0.453"0.750"0.059" to 0.067"AN960-716NAS1149-F0763P10000000000000000
    1/2"
    0.515"0.875"0.029" to 0.035"AN960-816LNAS1149-F0832P10000000000000000
    1/2"
    0.515"0.875"0.059" to 0.067"AN960-816NAS1149-F0863P10000000000000000
    9/16"
    0.578"1.062"0.059" to 0.067"AN960-916NAS1149-F0963P5000000000000000
    5/8"
    0.640"1.188"0.029" to 0.035"AN960-1016LNAS1149-F1032P500000000000000
    5/8"
    0.640"1.188"0.059" to 0.067"AN960-1016NAS1149-F1063P5000000000000000
    3/4"
    0.765"1.312"0.028" to 0.036"AN960-1216LNAS1149-F1232P5000000000000000
    3/4"
    0.765"1.312"0.086" to 0.094"AN960-1216LNAS1149-F1290P1000000000000000
    7/8"
    0.890"1.500"0.028" to 0.036"AN960-1416LNAS1149-F1432P2500000000000000
    7/8"
    0.890"1.500"0.059" to 0.067"__NAS1149-F1463P1000000000000000
    7/8"
    0.890"1.500"0.086" to 0.094"AN960-1416NAS1149-F1490P1000000000000000
    1"
    1.015"1.750"0.028" to 0.036"AN960-1616LNAS1149-F1632P1000000000000000
    1"
    1.015"1.750"0.086" to 0.094"AN960-1616NAS1149-F1690P1000000000000000
     
    AluminumAbout Aluminum
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    One-third the weight of steel, these washers are commonly used in robotics, automation, and other applications that have weight limits. They're an alternative to stainless steel for rust resistance.
    High-Strength 2024 Aluminum—The strongest aluminum washers we offer, these are comparable in strength to steel.
    High-Strength Zinc-Yellow-Chromate-Plated 2024 Aluminum—A winning combination of strength and corrosion resistance. These washers are as strong as steel and withstand rust better than unplated 2024 aluminum.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    High-Strength 2024 Aluminum
    No. 0
    0.068"0.188"0.013" to 0.019"__NAS1149-DN016H25000000000000000
    No. 0
    0.068"0.188"0.028" to 0.036"__NAS1149-DN032H2500000000000000
    No. 2
    0.099"0.250"0.013" to 0.019"AN960-D2LNAS1149-DN216H10000000000000000
    No. 2
    0.099"0.250"0.028" to 0.036"AN960-D2NAS1149-DN232H10000000000000000
    No. 3
    0.105"0.250"0.013" to 0.019"AN960-D3LNAS1149-DN316H10000000000000000
    No. 3
    0.105"0.250"0.028" to 0.036"AN960-D3NAS1149-DN332H10000000000000000
    No. 4
    0.125"0.312"0.013" to 0.019"AN960-D4LNAS1149-DN416H10000000000000000
    No. 4
    0.125"0.312"0.028" to 0.036"AN960-D4NAS1149-DN432H10000000000000000
    No. 5
    0.140"0.438"0.013" to 0.019"__NAS1149-DN516H10000000000000000
    No. 5
    0.140"0.438"0.028" to 0.036"__NAS1149-DN532H10000000000000000
    No. 6
    0.149"0.375"0.013" to 0.019"AN960-D6LNAS1149-DN616H10000000000000000
    No. 6
    0.149"0.375"0.028" to 0.036"AN960-D6NAS1149-DN632H10000000000000000
    No. 8
    0.174"0.375"0.013" to 0.019"AN960-D8LNAS1149-DN816H10000000000000000
    No. 8
    0.174"0.375"0.028" to 0.036"AN960-D8NAS1149-DN832H10000000000000000
    No. 10
    0.203"0.438"0.013" to 0.019"AN960-D10LLNAS1149-D0316H10000000000000000
    No. 10
    0.203"0.438"0.028" to 0.036"AN960-D10LNAS1149-D0332H10000000000000000
    No. 10
    0.203"0.438"0.057" to 0.069"AN960-D10NAS1149-D0363H500000000000000
    No. 12
    0.234"0.625"0.059" to 0.071"AN960-D11NAS1149-D1165H5000000000000000
    1/4"
    0.265"0.500"0.013" to 0.019"AN960-D416LNAS1149-D0416H500000000000000
    1/4"
    0.265"0.500"0.028" to 0.036"__NAS1149-D0432H500000000000000
    1/4"
    0.265"0.500"0.057" to 0.069"AN960-D416NAS1149-D0463H500000000000000
    5/16"
    0.328"0.562"0.013" to 0.019"AN960-D516LNAS1149-D0516H5000000000000000
    5/16"
    0.328"0.562"0.028" to 0.036"__NAS1149-D0532H500000000000000
    5/16"
    0.328"0.562"0.057" to 0.069"AN960-D516NAS1149-D0563H5000000000000000
    3/8"
    0.390"0.625"0.013" to 0.019"AN960-D616LNAS1149-D0616H500000000000000
    3/8"
    0.390"0.625"0.028" to 0.036"__NAS1149-D0632H5000000000000000
    3/8"
    0.390"0.625"0.057" to 0.069"AN960-D616NAS1149-D0663H5000000000000000
    7/16"
    0.453"0.750"0.013" to 0.019"AN960-D716LNAS1149-D0716H500000000000000
    7/16"
    0.453"0.750"0.028" to 0.036"__NAS1149-D0732H5000000000000000
    7/16"
    0.453"0.750"0.057" to 0.069"AN960-D716NAS1149-D0763H5000000000000000
    1/2"
    0.515"0.875"0.013" to 0.019"AN960-D816LNAS1149-D0816H250000000000000
    1/2"
    0.515"0.875"0.028" to 0.036"__NAS1149-D0832H5000000000000000
    1/2"
    0.515"0.875"0.057" to 0.069"AN960-D816NAS1149-D0863H2500000000000000
    9/16"
    0.578"1.062"0.013" to 0.019"AN960-D916LNAS1149-D0916H2500000000000000
    9/16"
    0.578"1.062"0.057" to 0.069"AN960-D916NAS1149-D0963H2000000000000000
    5/8"
    0.640"1.188"0.013" to 0.019"AN960-D1016LNAS1149-D1016H2500000000000000
    5/8"
    0.640"1.188"0.028" to 0.036"__NAS1149-D1032H2500000000000000
    5/8"
    0.640"1.188"0.057" to 0.069"AN960-D1016NAS1149-D1063H2000000000000000
    3/4"
    0.765"1.312"0.013" to 0.019"AN960-D1216LNAS1149-D1216H2500000000000000
    3/4"
    0.765"1.312"0.083" to 0.097"AN960-D1216NAS1149-D1290H1000000000000000
    7/8"
    0.890"1.500"0.013" to 0.019"AN960-D416LNAS1149-D1416H2000000000000000
    7/8"
    0.890"1.500"0.083" to 0.097"AN960-D416NAS1149-D1490H1000000000000000
    1"
    1.015"1.750"0.013" to 0.019"AN960-D1616LNAS1149-D1616H2000000000000000
    1"
    1.015"1.750"0.028" to 0.036"__NAS1149-D1632H1000000000000000
    1"
    1.015"1.750"0.083" to 0.097"AN960-D1616NAS1149-D1690H50000000000000
    1 1/16"
    1.078"1.812"0.013" to 0.019"AN960-D1716LNAS1149-D1716H100000000000000
    1 1/16"
    1.078"1.812"0.083" to 0.097"AN960-D1716NAS1149-D1790H500000000000000
    1 1/8"
    1.140"1.875"0.013" to 0.019"AN960-D1816LNAS1149-D1816H100000000000000
    1 1/8"
    1.140"1.875"0.028" to 0.036"__NAS1149-D1832H1000000000000000
    1 1/8"
    1.140"1.875"0.083" to 0.097"AN960-D1816NAS1149-D1890H500000000000000
    1 5/8"
    1.640"2.375"0.083" to 0.097"AN960-D2616NAS1149-D2690H500000000000000
     
    High-Strength Zinc-Yellow-Chromate-Plated 2024 Aluminum
    No. 2
    0.099"0.250"0.013" to 0.019"AN960-JD2LNAS1149-DN216J10000000000000000
    No. 3
    0.105"0.250"0.013" to 0.019"AN960-JD3LNAS1149-DN316J10000000000000000
    No. 3
    0.105"0.250"0.028" to 0.036"AN960-JD3NAS1149-DN332J10000000000000000
    No. 4
    0.125"0.313"0.013" to 0.019"AN960-JD4LNAS1149-DN416J1000000000000000
    No. 4
    0.125"0.313"0.028" to 0.036"AN960-JD4NAS1149-DN432J1000000000000000
    No. 5
    0.140"0.438"0.013" to 0.019"__NAS1149-DN516J10000000000000000
    No. 5
    0.140"0.438"0.028" to 0.036"__NAS1149-DN532J10000000000000000
    No. 6
    0.149"0.375"0.013" to 0.019"AN960-JD6LNAS1149-DN616J1000000000000000
    No. 6
    0.149"0.375"0.028" to 0.036"AN960-JD6NAS1149-DN632J1000000000000000
    No. 8
    0.174"0.375"0.013" to 0.019"AN960-JD8LNAS1149-DN816J1000000000000000
    No. 8
    0.174"0.375"0.028" to 0.036"AN960-JD8NAS1149-DN832J1000000000000000
    No. 10
    0.203"0.438"0.013" to 0.019"AN960-JD10LLNAS1149-D0316J10000000000000000
    No. 10
    0.203"0.438"0.028" to 0.036"AN960-JD10LNAS1149-D0332J1000000000000000
    No. 10
    0.203"0.438"0.057" to 0.069"AN960-JD10NAS1149-D0363J1000000000000000
    1/4"
    0.265"0.500"0.013" to 0.019"AN960-JD416LNAS1149-D0416J500000000000000
    1/4"
    0.265"0.500"0.028" to 0.036"__NAS1149-D0432J1000000000000000
    1/4"
    0.265"0.500"0.057" to 0.069"AN960-JD416NAS1149-D0463J500000000000000
    5/16"
    0.328"0.562"0.028" to 0.036"__NAS1149-D0532J5000000000000000
    5/16"
    0.328"0.563"0.013" to 0.019"AN960-JD516LNAS1149-D0516J500000000000000
    5/16"
    0.328"0.563"0.057" to 0.069"AN960-JD516NAS1149-D0563J500000000000000
    3/8"
    0.390"0.625"0.013" to 0.019"AN960-JD616LNAS1149-D0616J500000000000000
    3/8"
    0.390"0.625"0.028" to 0.036"__NAS1149-D0632J250000000000000
    3/8"
    0.390"0.625"0.057" to 0.069"AN960-JD616NAS1149-D0663J250000000000000
    7/16"
    0.453"0.750"0.013" to 0.019"AN960-JD716LNAS1149-D0716J5000000000000000
    7/16"
    0.453"0.750"0.028" to 0.036"__NAS1149-D0732J2000000000000000
    7/16"
    0.453"0.750"0.057" to 0.069"AN960-JD716NAS1149-D0763J2500000000000000
    1/2"
    0.515"0.875"0.013" to 0.019"AN960-JD816LNAS1149-D0816J2000000000000000
    1/2"
    0.515"0.875"0.028" to 0.036"__NAS1149-D0832J250000000000000
    1/2"
    0.515"0.875"0.057" to 0.069"AN960-JD816NAS1149-D0863J2500000000000000
    9/16"
    0.578"1.062"0.013" to 0.019"AN960-JD916LNAS1149-D0916J2000000000000000
    9/16"
    0.578"1.062"0.028" to 0.036"__NAS1149-D0932J100000000000000
    9/16"
    0.578"1.062"0.057" to 0.069"AN960-JD916NAS1149-D0963J100000000000000
    5/8"
    0.640"1.188"0.013" to 0.019"AN960-JD1016LNAS1149-D1016J2000000000000000
    5/8"
    0.640"1.188"0.028" to 0.036"__NAS1149-D1032J1000000000000000
    5/8"
    0.640"1.188"0.057" to 0.069"AN960-JD1016NAS1149-D1063J1000000000000000
    3/4"
    0.765"1.312"0.013" to 0.019"AN960-JD1216LNAS1149-D1216J1000000000000000
    3/4"
    0.765"1.312"0.028" to 0.036"__NAS1149-D1232J1000000000000000
    3/4"
    0.765"1.312"0.083" to 0.097"AN960-JD1216NAS1149-D1290J500000000000000
    7/8"
    0.890"1.500"0.013" to 0.019"AN960-JD1416LNAS1149-D1416J1000000000000000
    7/8"
    0.890"1.500"0.028" to 0.036"__NAS1149-D1432J1000000000000000
    7/8"
    0.890"1.500"0.083" to 0.097"AN960-JD1416NAS1149-D1490J500000000000000
    1"
    1.015"1.750"0.013" to 0.019"AN960-JD1616LNAS1149-D1616J1000000000000000
    1"
    1.015"1.750"0.028" to 0.036"__NAS1149-D1632J50000000000000
    1 1/16"
    1.078"1.812"0.013" to 0.019"AN960-JD1716LNAS1149-D1716J50000000000000
    1 1/16"
    1.078"1.812"0.028" to 0.036"__NAS1149-D1732J50000000000000
    1 1/16"
    1.078"1.812"0.083" to 0.097"__NAS1149-D1790J500000000000000
    1 1/8"
    1.140"1.875"0.013" to 0.019"AN960-JD1816LNAS1149-D1816J50000000000000
    1 5/16"
    1.328"2.062"0.013" to 0.019"AN960-JD2116LNAS1149-D2116J1000000000000000
     
    Brass
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    Softer than most metals, brass washers won't damage other fastening components.
    Brass—With a warm, polished look, these washers are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Brass
    No. 3
    0.105"0.250"0.013" to 0.019"__NAS1149-BN316H50000000000000000
    No. 6
    0.149"0.375"0.028" to 0.036"AN960-B6NAS1149-BN632H5000000000000000
    No. 8
    0.174"0.375"0.013" to 0.019"__NAS1149-BN816H5000000000000000
    No. 8
    0.174"0.375"0.028" to 0.036"AN960-B8NAS1149-BN832H5000000000000000
    No. 10
    0.203"0.438"0.028" to 0.036"__NAS1149-B0332H5000000000000000
    No. 12
    0.265"0.500"0.028" to 0.036"__NAS1149-B0432H5000000000000000
    No. 12
    0.265"0.500"0.057" to 0.069"AN960-B416NAS1149-B0463H2500000000000000
    1/4"
    0.328"0.562"0.013" to 0.019"__NAS1149-B0516H10000000000000000
    5/16"
    0.328"0.562"0.028" to 0.036"__NAS1149-B0532H2500000000000000
    5/16"
    0.328"0.562"0.057" to 0.069"AN960-B516NAS1149-B0563H2500000000000000
    3/8"
    0.390"0.625"0.028" to 0.036"__NAS1149-B0632H2500000000000000
    3/8"
    0.390"0.625"0.057" to 0.069"AN960-B616NAS1149-B0663H2000000000000000
    7/16"
    0.453"0.750"0.057" to 0.069"AN960-B716NAS1149-B0763H2000000000000000
    1/2"
    0.515"0.875"0.057" to 0.069"AN960-B816NAS1149-B0863H1000000000000000
    5/8"
    0.640"1.188"0.013" to 0.019"__NAS1149-B1016H2000000000000000
    5/8"
    0.640"1.188"0.028" to 0.036"__NAS1149-B1032H1000000000000000
    5/8"
    0.640"1.188"0.057" to 0.069"AN960-B1016NAS1149-B1063H500000000000000
    3/4"
    0.765"1.312"0.011" to 0.021"__NAS1149-B1216H1000000000000000
    3/4"
    0.765"1.312"0.028" to 0.036"__NAS1149-B1232H500000000000000
    3/4"
    0.765"1.312"0.055" to 0.071"__NAS1149-B1263H500000000000000
    1"
    1.015"1.750"0.083" to 0.097"AN960-B1616NAS1149-B1690H10000000000000
     
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