Used on recording subsystem sdv mks mod1. 2a thread class right-hand 0.250" thread length pan no. 2 head style 40 thread quantity per inch screw machine pan head slotted plastic (nylon) unc-2a unc thread series
3a thread class right-hand flush countersunk head style 0.683" grip length 32 thread quantity per inch aluminum alloy surface treated unjc thread series
3a thread class right-hand flush countersunk head style 0.620" grip length 32 thread quantity per inch aluminum alloy surface treated unjc thread series
3a thread class right-hand 0.323" thread length pan head style 1.000" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.370" thread length hexagon head style 0.062" grip length 28 thread quantity per inch aluminum surface treated unjf thread series