2a thread class right-hand 2.889" thread length knurled no. 1 head style 18 thread quantity per inch navy special project oxide surface treated unc thread series
3a thread class right-hand 1.389" thread length wing no. 4 head style 18 thread quantity per inch apply nylon thread locking compound 0.500 in. lg on threaded area zinc surface treated unc thread series
2a thread class right-hand 1.389" thread length wing no. 3 head style 18 thread quantity per inch one hole on threads 0.094 in. min, 0.097 in. max dia chromate zinc surface treated unc thread series
2a thread class right-hand 1.846" thread length knurled no. 1 head style 0.400" hole diameter 13 thread quantity per inch navy special project unc thread series