McMaster-Carr logo
    Filter by
    System of Measurement
    Thread Size
    Industrial Info Snippet
    Thread Type
    Nut Type
    Industrial Info Compare
    Military Specification
    Material
    Locking Type
    Hex Nut Profile
    Width
    Attribute Image
    Certification
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Insert Maximum Temperature
    Sold As
    Height
    Attribute Image
    Drive Style
    Industrial Info Snippet
    Thread Spacing
    Industrial Info Snippet
    Fastener Strength Rating
    Thread Direction
    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. Nylon-Insert Locknuts

    Image of Product. Front orientation. Locknuts. Mil. Spec. Nylon-Insert Locknuts.
    These locknuts are manufactured and tested to strict U.S. military standards for material and construction. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.
    Low-Strength Steel
    Rated Grade 2, Class 6, or lower, these locknuts are about half as strong as medium-strength steel nuts. Use them with screws that have a similar strength rating to avoid stripping threads during installation.
    Cadmium Yellow-Chromate-Plated Steel—These locknuts have good lubricity to thread on smoothly and ease installation. The plating also creates a barrier against rust that's comparable to zinc-yellow-chromate plating.
    Thread
    Size
    Wd.
    Ht.
    Mil.
    Spec.
    Insert Max.
    Temp., ° F
    Pkg.
    Qty.
    Pkg.
    Cadmium Yellow-Chromate-Plated Steel
    5/16"-24
    		1/2"23/64"MS21044-N5250500000000000000
    Mil. Spec. Nylon-Insert Locknut, Low-Strength Steel, 5/16"-24 Thread Size, MS21044-N5
    Pack of 5Delivers Monday 7-9 am
     
    back to top