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 5945-00-269-4035
NSN 6685-01-650-2586
NSN 2925-00-915-1827
NSN 6135-01-370-9441
NSN 5855-00-138-2386
NSN 6620-01-271-8984
NSN 2925-01-090-2391
NSN 6135-01-036-3495
NSN 5925-01-349-0855
NSN 6110-01-098-4803
NSN 6105-01-052-4040
NSN 5930-00-959-3027