Cres round rod, type 303, cond a, centerless gnd, qq-s-764; passivated, mil-f-14072, finish e300; 0.260 in. Long; threaded lg is 0.130 in.; 0.138-32-unc-2a; 0.139 in. Porm 0.002 in. Dia; 0.02 rad max 2 places; end radius 0.02 in. By 45 deg; head radius 0.030 in. By 0.45 deg; head diameter 0.097 in. Porm 0.004 in. Dia