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 5990-01-417-4402
NSN 6220-01-504-4448
NSN 6685-01-386-3110
NSN 5950-01-212-9660
NSN 5990-01-491-8900
NSN 5990-01-539-3683
NSN 5925-01-326-7226
NSN 5925-01-361-1775
NSN 6610-00-719-5308
NSN 6240-01-147-7494
NSN 6130-01-102-5935
NSN 5835-01-462-5983