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alloy steel; cadmium plated, QQ-P-416, type 2, class 3; hardness rating RC39-43; thd series 0.312-24UNJF-3B; nut h 0.405 in. max; nut dia 0.535 in.; counterbore depth 0.122 in.; counterbore dia 0.348 in.; special wrench configuration for no. 12 spline drive; 8 splines; deformed thd locking feature
1EA
Schedule B number: 7318160000
nmfc 093486
Nuts of iron or steel
FSC 5310 ⁓ Nuts and washers
Note-nuts and washers, including specially designed, are to be classified in this fsc. a. nuts are a small metal block made in a variety of shapes such as square and hexagonal which is drilled and internally threaded. b. washers are a perforated piece of metal, leather, or other materials of various shapes or forms. they are used primarily as a seat for a bolt, nut, screw, rivet or nail to distribute pressure and prevent endwise motion over an area and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.
Excluding bearing thrust washers (fsc 3120); shims (fsc 5365); ring spacers (fsc 5365); plate spacers (fsc 5365); lock rings (fsc 5365).