2a stud thread thread class right-hand nut thread 2.625" overall length 13 stud thread thread quantity per inch locked in unc stud thread thread series
3a nut thread thread class right-hand nut thread 0.312" stud thread thread length 1.600" overall length 24 nut thread thread quantity per inch used on KC135r aircraft locked in unjf nut thread thread series
3a nut thread thread class right-hand nut thread 0.255" thread length 1.000" overall length 28 stud thread thread quantity per inch locking ring cres comp 410 per ams 5504 or ams 5613 or cres comp 420 per ams 5506 or ams 5621 cadmium surface treated locked in unjf nut thread thread series