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 5910-01-304-0359
NSN 4140-01-602-6326
NSN 6150-00-753-3950
NSN 5990-00-707-0731
NSN 5965-01-499-7318
NSN 6620-00-081-7899
NSN 7035-01-145-5059
NSN 5920-00-196-3631
NSN 5855-01-505-3248
NSN 5910-00-752-5902
NSN 5990-00-269-2226
NSN 6150-00-244-2664