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 6150-00-201-9583
NSN 5975-00-498-6918
NSN 5999-01-240-1212
NSN 5855-01-068-3683
NSN 6240-01-463-3129
NSN 5960-00-828-4704
NSN 6150-01-036-8060
NSN 5975-01-359-4020
NSN 4140-01-243-1281
NSN 5945-01-541-2406
NSN 5996-00-406-9935
NSN 5925-01-333-0303