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 6130-00-531-3326
NSN 5915-01-323-6451
NSN 2925-01-455-2558
NSN 6150-01-556-5367
NSN 5925-01-519-3969
NSN 6320-00-977-3930
NSN 5985-01-197-9918
NSN 6645-00-991-0877
NSN 5999-00-624-9397
NSN 6645-00-256-4072
NSN 7035-01-442-3987
NSN 6620-01-242-7236