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 5975-01-415-0918
NSN 5915-00-740-4336
NSN 5915-01-206-2851
NSN 6645-01-364-2211
NSN 6685-01-275-2679
NSN 5999-01-112-0192
NSN 6685-01-286-8679
NSN 5935-00-440-9051
NSN 5925-00-642-5253
NSN 6685-01-387-2944
NSN 6320-01-033-6624
NSN 6150-01-029-2488