A circular shaped item with an aperture manufactured to predetermined dimensions, constructed with a rectangular cross section that may be solid, with joint, or in a helical form that facilitates spiral wrap installation. It prevents seal extrusion under pressure and is designed to fit on the down-pressure side of a gland groove with a packing, preformed or o-ring.
NSN 2925-00-149-0760
NSN 6240-01-525-6585
NSN 5925-01-070-6605
NSN 5950-00-575-6922
NSN 6685-01-211-6590
NSN 5960-00-243-9155
NSN 6150-01-518-9402
NSN 5905-00-243-9520
NSN 5835-00-868-8815
NSN 6320-01-544-6447
NSN 4140-00-816-8820
NSN 5998-01-067-9359