Used on torpedo tube,submerged,upr rh,mk71,mod1 and upr lh,mk71,mod2. torpedo tube,submerged,lwr rh,mk71,mod3 and lwr lh,mk71,mod4. (drawing) , screw cap selflocking
0.225" inside diameter external ring style retaining ring thickness .025, for shaft dia .250, rockwell hardness is C44-C51, tensil strength is 225, 000 psi
3a thread class right-hand 0.312" thread length double chamfer head style 28 thread quantity per inch machine, screw material is beryllium copper, heat treat to cond. ht per PS15935, see dwg. for additional specifications unf thread series
Used on hatch, 30 inch diameter forward sh conn; hatch, 30 inch diamter middle sh conn; hatch, 30 inch diameter aft sh conn. (navy) bolt, eccentric head