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mal aly 6061-T6 per QQ-A-250/11, chromate per MIL-C-5541, class 1a surftreatment, 1.120 in. id, 1.280 in. square, 4 mounting holes, 4-40 unc THD2B thd class mounting holes, 0.125 in.thick, 0.968 in. between mounting holes
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).