1/2 in.
No other part numbers with same form, fit, and function found.
NSN 5960-00-931-4215
NSN 6110-00-758-2051
NSN 5905-00-972-2595
NSN 5960-00-171-9575
NSN 5999-00-446-4540
NSN 5895-01-018-0725
NSN 5999-00-433-5420
NSN 5935-01-443-2427
NSN 5950-01-193-1964
NSN 5855-01-088-8700
NSN 6645-00-262-7448
NSN 5945-00-619-3553