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 6150-01-561-0150
NSN 7035-00-535-8109
NSN 5935-01-533-1194
NSN 6650-00-011-3435
NSN 6150-01-364-2159
NSN 5960-01-223-1203
NSN 5920-01-447-6793
NSN 6320-01-116-3980
NSN 5985-00-320-6403
NSN 4140-00-441-4184
NSN 6620-01-141-9997
NSN 6220-01-367-0832