Used on shelter system m51, nbc;assault amphibious vehicle. 2a thread class right-hand pan head style 32 thread quantity per inch bright zinc zinc surface treated unf thread series
3a thread class right-hand 0.274" thread length flat countersunk head style 40 thread quantity per inch furnished with expander; sleeve 0.112-40unc-2b; expander min shear strength 120000 psi unc thread series
3a thread class right-hand 0.462" thread length fillister head style 28 thread quantity per inch anodize primary washer surface treated unf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 49000 single pounds per square inch shear strength cadmium surface treated
Used on 3990-01-444-5196 cement mixer. 2a thread class right-hand 1.000" thread length 20 thread quantity per inch furnished w/1 hex nut zinc surface treated round bend unc thread series