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 5905-00-916-9066
NSN 5835-01-310-8979
NSN 5985-00-291-8583
NSN 7035-01-344-8708
NSN 6610-01-232-0814
NSN 6150-01-504-6808
NSN 7035-00-064-7008
NSN 6240-00-110-9414
NSN 5835-00-327-6192
NSN 5935-01-237-8015
NSN 6150-00-107-8208
NSN 6620-01-570-4026