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lmaterial cres QQ-S-764 class 303 cond a cold finish; finish E300 per MIL-F-14072; thread 4-40 NC-28, 0.281 in. dia stock, thread lg 0.192 in.; lg 0.312 in.; counterbore dia 0.161 in., shoulder dia 0.191 in.
Schedule B number: 7318160000
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).