3a thread class right-hand 2.1870" overall length 0.3745" bore diameter 20 thread quantity per inch nas std keyway chromium inner member surface treated ball type unf thread series
3a thread class right-hand 0.3440" thread length 0.7820" overall length 32 thread quantity per inch NAS516-1 lubricator fitting in roller end of stvd, cotter pin hole in stud, chrome plating to be 0.0.0004 to 0.0007 in. chromium roller surface treated cam follower unf thread series