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 6220-00-400-3313
NSN 5975-00-165-5834
NSN 5945-00-707-3384
NSN 6650-00-647-1085
NSN 5835-01-163-4215
NSN 5905-01-236-5903
NSN 6150-00-322-1445
NSN 6110-00-432-7414
NSN 5990-01-124-4291
NSN 5920-01-293-7418
NSN 5945-01-156-0242
NSN 5925-01-298-7163