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 6130-00-369-6637
NSN 6135-01-069-2482
NSN 6150-00-122-2566
NSN 6685-01-326-6377
NSN 7035-01-392-8255
NSN 5965-01-064-2107
NSN 6320-01-425-1417
NSN 5990-00-078-8529
NSN 6645-01-576-9896
NSN 5905-01-455-3383
NSN 6620-00-804-8272
NSN 5935-00-939-8123