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 5935-01-380-3476
NSN 5855-01-335-8907
NSN 5910-01-474-5388
NSN 6620-01-023-2938
NSN 5895-01-438-2203
NSN 6650-00-585-2786
NSN 5925-00-204-7494
NSN 4140-01-451-3774
NSN 6105-01-484-5557
NSN 5855-00-079-2370
NSN 6320-00-295-1572
NSN 5930-01-223-9299