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 5925-00-315-2238
NSN 5999-00-722-0975
NSN 5985-00-081-1885
NSN 5985-00-840-9954
NSN 6645-01-633-1852
NSN 5910-01-224-8214
NSN 5975-01-459-4832
NSN 6220-01-378-2556
NSN 5945-01-555-8059
NSN 5905-00-242-9821
NSN 5998-01-308-9106
NSN 6645-01-116-3423