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 5945-00-542-1281
NSN 6220-01-427-2333
NSN 6110-01-483-0639
NSN 2925-01-242-2309
NSN 6650-01-122-0169
NSN 5998-01-284-3636
NSN 7035-01-114-8550
NSN 6650-01-127-9518
NSN 5910-00-816-9556
NSN 5930-01-415-2834
NSN 5975-00-157-9676
NSN 5920-01-357-4694