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 5905-01-572-0663
NSN 5935-00-345-1676
NSN 5925-01-111-0655
NSN 5925-01-337-2362
NSN 5996-01-410-6984
NSN 5960-01-118-3394
NSN 5999-00-319-2259
NSN 5975-01-145-1518
NSN 6650-01-515-0391
NSN 5965-00-831-0481
NSN 6150-00-570-7793
NSN 6110-00-546-5145