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 5998-01-332-6290
NSN 6650-01-571-7122
NSN 5925-00-875-1296
NSN 7035-01-132-7209
NSN 6150-00-556-5543
NSN 5996-01-567-5340
NSN 2925-00-355-5130
NSN 5960-01-144-9183
NSN 6685-01-482-4100
NSN 2925-00-355-5130
NSN 6130-01-414-5369
NSN 5930-01-503-1032