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 6240-00-451-6921
NSN 6645-01-444-3016
NSN 5895-01-562-8109
NSN 6105-01-585-6137
NSN 6130-01-336-6586
NSN 5920-01-273-5461
NSN 5835-01-558-9444
NSN 6130-00-925-2303
NSN 5855-01-261-5495
NSN 5925-00-060-6732
NSN 5915-01-406-4637
NSN 6145-00-918-9494