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0.875-20 UNEF-2B rh thread, steel IE303 or IE937 fscm 11083, steam oxidized for corrosion resistance, 1.250 in. width across flats, 0.440 in. nut height, 1.188 in. pilot dia, 0.906 in. counter bore dia, 0.220 in. counterbore depth
1EA
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).