2a thread class right-hand 0.531" overall length 6 thread quantity per inch four 0.052 dia holes located on face of cap for safety wire uns thread series
2a thread class right-hand 20 thread quantity per inch item must comply with requirements of defense electronics supply center production standard no. L00440 external threads w/chain or rope unef thread series
2b thread class right-hand 20 thread quantity per inch item must comply with requirements of defense electronics supply center production standard no. L01302 internal thread w/chain or rope unef thread series