Used on pacer dawn. flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.376" grip length chromate locking ring surface treated
2a thread class right-hand 0.750" thread length hexagon head style A20 thread quantity per inch small crowned in center of hexagon head unc thread series
2a thread class right-hand 1.000" thread length 20 thread quantity per inch bolt is supplied with 2 hex nuts; for 1/2 inch pipe size round bend unc thread series
3a thread class right-hand 0.276" thread length dished hexagon head style 0.490" grip length 32 thread quantity per inch chromium bearing surface of head surface treated unjf thread series
3a thread class right-hand 0.276" thread length hexagon head style 0.812" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.316" thread length hexagon head style 1.240" grip length 28 thread quantity per inch chromium bearing surface of head surface treated unjf thread series
3a thread class right-hand 0.453" thread length dished hexagon head style 0.070" hole diameter 1.490" grip length 20 thread quantity per inch drilled holes in shank shall be perpendicular chromium bearing surface of head surface treated unjf thread series