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 6240-01-081-1368
NSN 6240-01-623-0340
NSN 7035-01-294-1165
NSN 6135-01-210-8715
NSN 5930-01-393-4468
NSN 5960-01-254-3541
NSN 6685-01-469-3137
NSN 7035-01-158-7673
NSN 5905-00-476-0215
NSN 5998-01-022-8756
NSN 6110-00-385-2978
NSN 5996-01-506-1269