A rigid item varied in size and shape. It is normally located on the bottom of a valve. It must have drilled and/or tapped holes for mounting purposes.
NSN 5895-01-571-5256
NSN 5998-00-778-8475
NSN 5999-01-514-7439
NSN 5975-00-557-7995
NSN 6220-01-367-0567
NSN 5905-01-126-6589
NSN 5985-01-472-2037
NSN 6240-00-456-2578
NSN 5985-01-605-1198
NSN 6135-01-313-4865
NSN 5895-01-541-8599
NSN 6150-00-244-2258