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 5910-01-620-2929
NSN 5855-01-658-4510
NSN 5910-00-255-4054
NSN 6650-01-333-1770
NSN 5999-01-223-9735
NSN 2925-01-503-6792
NSN 7035-00-111-4389
NSN 6145-00-345-2565
NSN 6685-01-263-0631
NSN 5910-00-318-8766
NSN 5975-00-238-6010
NSN 6110-00-229-1360