3/8 inches
No other part numbers with same form, fit, and function found.
NSN 5985-00-856-6037
NSN 5965-01-441-9505
NSN 5960-01-120-6523
NSN 6110-00-119-6216
NSN 6610-00-079-1508
NSN 5920-00-012-0151
NSN 5965-01-204-8505
NSN 5920-01-588-9914
NSN 5895-01-412-0950
NSN 5930-00-807-1273
NSN 5965-01-316-4429
NSN 5996-01-633-7979