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 5996-00-399-0731
NSN 6145-01-510-3352
NSN 6240-00-155-8728
NSN 5975-00-566-4232
NSN 5945-00-004-9503
NSN 5999-01-083-8715
NSN 6135-01-213-7339
NSN 6620-00-628-9304
NSN 6150-01-454-5044
NSN 5930-01-423-0874
NSN 5950-00-468-7991
NSN 5965-01-633-8849