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 6110-01-204-0000
NSN 5905-01-025-6949
NSN 6135-01-291-6712
NSN 7035-00-541-8516
NSN 5990-01-074-0055
NSN 5930-00-781-3052
NSN 5950-00-389-7139
NSN 5965-01-645-8572
NSN 5935-00-979-7628
NSN 6645-01-523-7171
NSN 5835-01-394-3812
NSN 6150-01-026-1630