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 5915-01-204-6136
NSN 5985-00-412-3294
NSN 5945-01-063-4769
NSN 5925-01-028-4085
NSN 5960-01-375-6815
NSN 7035-01-633-9537
NSN 5950-01-627-9707
NSN 4140-00-826-9031
NSN 6645-01-008-2720
NSN 5996-00-351-2369
NSN 6135-01-479-9790
NSN 5990-00-419-0236