Used on mrap - unique nsn - 2 mrap variants. used on intermediate differential carrier assembly; tm 9-2320-327-24p figure 144 item 26 split helical-left hand
Used on mrap buffalo mk2a2. 2a thread class right-hand 24 thread quantity per inch grade 5 zinc plated steel hex nylon insert locknut locknut type nylon insert with locking element is effective up to plus 250 degrees f zinc surface treated