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 5990-00-232-3965
NSN 5985-00-864-6707
NSN 5990-01-442-3520
NSN 2925-01-027-1293
NSN 4140-00-179-0200
NSN 5910-01-064-2364
NSN 6105-01-356-7056
NSN 5999-01-437-6569
NSN 5996-00-680-9932
NSN 5915-01-558-4426
NSN 6240-00-003-6435
NSN 6685-00-555-3054