2a thread class right-hand 1.750" thread length knurled no. 1 head style 16 thread quantity per inch 0.070 to 0.080 in. dia. hole drilled in threads 1.875 to 1.907 in. from bearing surface of head unc thread series
3a thread class right-hand 1.840" thread length knurled no. 1 head style 18 thread quantity per inch hole in point parallel to the axis, hole on one side of point 0.119 in. from end; slot 1.125 in. from end of point on other side from the other side of hole unf thread series
2a thread class right-hand 0.202" thread length knurled no. 4 head style 32 thread quantity per inch navy special project passivate surface treated unc thread series
2a thread class right-hand 0.380" thread length knurled no. 4 head style 20 thread quantity per inch extended portion above knurled head 0.370 in. high 0.180 in. wide-centered passivate surface treated unc thread series
2a thread class right-hand 0.410" thread length knurled no. 1 head style 24 thread quantity per inch third shoulder 0.500 in. nom dia, 0.060 in. nom length oxide surface treated unf thread series
Used on runway end indicator lights (reil). 3a thread class right-hand 0.438" thread length 24 thread quantity per inch concentric pin in top of head, 0.038 in.dia by 0.063 in.high unc thread series
2a thread class right-hand 0.438" thread length thumb no. 4 head style 24 thread quantity per inch ring groove 0.029 in. min., 0.032 in. max. long, dia. 0.210 in. min. 0.213 max. located 1.750 in. from end of screw passivate surface treated unc thread series
