A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6320-01-261-5983
NSN 5935-01-580-0709
NSN 6610-01-269-5437
NSN 6145-01-289-4676
NSN 5895-00-205-2924
NSN 4140-00-555-3856
NSN 5998-01-550-9808
NSN 6240-01-599-9668
NSN 5990-01-583-2870
NSN 5996-00-417-9706
NSN 5975-01-222-8757
NSN 5945-01-391-7485