McMaster-Carr logo
    Filter by
    Material
    System of Measurement
    Screw Size
    Industrial Info Snippet
    Certification
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Hardness
    Military Specification
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Washer Type
    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)
    1 Product

    Mil. Spec. Washers

    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    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.
    Copper
    These have the best conductivity of all our metal washers. They're often used to secure electrical connections inside breaker panels and to fasten components on printed circuit boards. They're also the softest of all our metal washers, so they won't damage screws and nuts. However, copper washers aren't as corrosion resistant as brass washers, and will develop a green patina over time.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Copper
    5/16"
    		0.344"0.688"0.051" to 0.080"MS15795-5122097565A128000000
    Copper Mil. Spec. Washer for 5/16" Screw Size, 0.344" ID, 0.688" OD, MS15795-512
    Pack of 20In stock
     
    back to top