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 5925-01-025-7008
NSN 5950-01-466-7369
NSN 5985-01-050-8310
NSN 5945-01-184-5356
NSN 5895-01-320-6855
NSN 7035-01-107-2811
NSN 6145-00-936-0083
NSN 6240-01-003-4994
NSN 2925-01-503-4386
NSN 5950-01-264-2083
NSN 4140-01-165-9469
NSN 6685-01-426-5452