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 5945-01-535-7037
NSN 6650-01-050-8680
NSN 6610-01-097-5073
NSN 6150-01-363-2798
NSN 6130-00-224-8387
NSN 6110-00-269-2696
NSN 6645-00-385-3684
NSN 7035-00-117-0418
NSN 5895-00-960-5841
NSN 5920-00-925-2639
NSN 6145-01-441-9152
NSN 5985-01-039-5976