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0.250-28 UNJF-3B rh thread, nut alluminum alloy 7075 temper T73, seal plastic MIL-P-19468, nut anodized MIL-A-8625 type 2 class 2, soluble lubricant, 0.461 in. max washer outside dia, 0.335 in. max height of nut, 0.107 in. min and 0.117 in. max counterbore depth, 0.254 in. min and 0.268 in. max counterbore dia, prevailing torque all metal locking feature, spline type wrenching feature, 250 deg f temp rating
Schedule B number: 7616106000
nmfc 013540
Threaded fasteners of aluminum
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).