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 6220-00-061-1522
NSN 6220-00-857-7565
NSN 6130-00-869-6405
NSN 6650-01-329-3055
NSN 2925-01-622-8568
NSN 5925-00-244-0711
NSN 5920-00-243-9506
NSN 6620-01-303-2563
NSN 5905-01-089-2084
NSN 6610-00-841-5161
NSN 6620-00-581-8984
NSN 5930-00-563-7944