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 6685-01-552-9394
NSN 6110-01-237-4637
NSN 5905-00-625-8767
NSN 5935-01-388-1002
NSN 6110-01-056-4964
NSN 5999-01-237-2666
NSN 6145-01-558-9396
NSN 6105-00-248-5772
NSN 5999-01-604-0965
NSN 6620-01-192-6186
NSN 5935-01-629-4026
NSN 6645-00-955-7997