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steel, AMS6381 or steel, AMS6382, fscm 81343, phosphate coat, MIL-P-16232, type z, class 4a, nut height, 0.354 in. min, 0.364 in. max, 1.860 in. min, 1.870 in. max, od, grooved and counterbored one face, 1.375-18, UNJEF-3Bg, thd size, fluorescent penetrant inspect per P3TF2Class a, fscm 99207
gearbox, accessory drive, turbine engine, acft
1EA
Schedule B number: 7318160000
nmfc 093470
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).