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 5975-01-090-1062
NSN 6240-01-076-5231
NSN 5915-00-058-9207
NSN 5975-01-415-4283
NSN 6610-00-045-5733
NSN 6650-00-726-4242
NSN 6620-00-273-8735
NSN 5999-01-168-8788
NSN 5999-01-584-1634
NSN 6145-01-015-1737
NSN 5920-01-056-9427
NSN 6240-01-619-2122