Serving our customers with quality and safety first.
thread size 1.8750-16 UNJ-3B, RIGHT-Hand thd direction, steel per MIL-S-6758 comp 4130 cond d , surface cadmium plate , not casehardened, not rated for tensile or yield strength, small end dia 2.280 in., nut dia 2.530 in. max., nut thk 2.500 in. nom drive point width 0.250 in. nom, drive point quantity 8 equally spaced, 4 drilled holes equally spaced, drilled holes 0.062 in. dia, all machined surfaces 125.0 microinch finish, heat treat to 160000 - 180000 psi
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).