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matl steel 4130 or 4140, per QQ-S-624; heat treat per MIL-H-6875; finish 5.3.2.2 per MIL-STD-171; flange dia 1.250 in.; threaded hole thru flange 3/8-24 UNF-2B; first step dia 0.840 in.; second step dia 0.980 in.; third step dia 0.700 in.; unthreaded hole thru third step 0.390 in. dia; transverse hole 0.390in. dia thru third step; 0.285 in. distance center line from second end
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).