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 5905-01-592-7406
NSN 6650-01-549-2126
NSN 5855-01-059-2710
NSN 5998-01-362-8423
NSN 5985-00-529-0093
NSN 5999-01-079-8010
NSN 6110-01-076-1737
NSN 5905-01-533-6232
NSN 6110-01-235-1633
NSN 5905-00-787-2293
NSN 7035-00-104-7613
NSN 7035-00-679-9027