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 6130-01-044-4162
NSN 5960-01-413-3877
NSN 4140-00-728-3097
NSN 5925-01-391-1014
NSN 5910-00-928-5634
NSN 5999-01-466-0398
NSN 5960-01-160-3437
NSN 5895-00-363-9370
NSN 5910-01-095-8545
NSN 5935-01-244-9525
NSN 2925-00-942-2417
NSN 5990-00-068-4324