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    6 Products

    Mil. Spec. Flex-Top Locknuts for Heavy Vibration

    Image of Product. Front orientation. Locknuts. Mil. Spec. Flex-Top Locknuts for Heavy Vibration.
    These locknuts are manufactured and tested to strict U.S. military standards for material and construction. The top section expands to grip the screw on all sides for a stronger hold than both nylon-insert and distorted-thread locknuts. As a result, they're suitable for use in equipment with constant, vigorous vibration, such as engines. These locknuts are reusable a handful of times, but the holding power decreases with each use.
    Corrosion-Resistant Stainless Steel
    Silver-Plated 18-8 Stainless Steel—The choice for wet and outdoor environments, these locknuts won't rust. The silver plating adds lubricity to help them thread on smoothly during installation.
    Thread
    Size
    Wd.
    Ht.
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Silver-Plated 18-8 Stainless Steel
    4-40
    		1/4"9/64"MS21046C04, NASM21046199851A101000000
    6-32
    		5/16"11/64"MS21046C06, NASM21046199851A10200000
    8-32
    		11/32"15/64"MS21046C08, NASM21046199851A1030000
    10-32
    		3/8"15/64"MS21046C3, NASM21046199851A10400000
    1/4"-28
    		7/16"9/32"MS21046C4, NASM21046199851A10500000
    3/8"-24
    		9/16"25/64"MS21046C6, NASM21046199851A10600000
     
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