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 5895-01-164-7345
NSN 6130-01-221-6276
NSN 5855-00-167-7893
NSN 6320-01-371-3047
NSN 5835-01-003-8076
NSN 6320-01-607-0347
NSN 2925-01-144-7106
NSN 6110-01-181-0293
NSN 5905-01-650-6550
NSN 5855-01-167-2162
NSN 5835-00-912-5656
NSN 5895-00-405-5672