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 5920-00-099-0826
NSN 5965-01-058-6285
NSN 5855-01-455-1491
NSN 5999-00-591-6774
NSN 6240-00-110-9414
NSN 6685-01-385-6338
NSN 6620-01-386-5914
NSN 6685-01-194-2560
NSN 5935-01-511-6594
NSN 6145-00-378-3836
NSN 2925-01-368-1333
NSN 6150-01-255-4760