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 5996-01-008-4456
NSN 6645-01-592-2557
NSN 5835-01-122-6951
NSN 5925-01-068-2887
NSN 6645-01-391-3499
NSN 5975-01-510-2923
NSN 6150-01-495-1009
NSN 5930-00-453-2500
NSN 5999-01-182-6561
NSN 5965-01-537-7731
NSN 5945-00-850-9873
NSN 6240-00-500-0524