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 5945-01-633-1886
NSN 5965-01-500-2468
NSN 7035-01-437-4137
NSN 2925-00-310-3690
NSN 5920-01-472-5409
NSN 6145-00-805-3354
NSN 5975-00-960-5879
NSN 5855-01-234-5346
NSN 5920-01-568-8995
NSN 7035-00-859-9601
NSN 5999-00-305-2751
NSN 7035-01-597-7179