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 5935-01-057-7228
NSN 5975-00-446-6852
NSN 5895-01-542-4716
NSN 6240-00-383-7668
NSN 2925-01-274-8576
NSN 5920-00-391-6252
NSN 5915-00-450-8721
NSN 5925-01-081-5210
NSN 4140-01-066-4681
NSN 5990-01-487-0871
NSN 6645-01-009-7678
NSN 5975-01-340-2526