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 5950-01-025-6732
NSN 5935-01-067-8380
NSN 6135-01-537-1234
NSN 5915-00-264-5657
NSN 6145-01-041-3057
NSN 5920-01-123-2821
NSN 6135-00-078-9931
NSN 4140-01-370-1309
NSN 5905-00-119-8811
NSN 5996-01-213-5184
NSN 6685-00-536-9688
NSN 2925-01-298-2674