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 6645-00-209-0420
NSN 6130-01-444-0557
NSN 6130-00-114-2547
NSN 5905-01-432-1961
NSN 5925-00-100-0102
NSN 5895-00-862-5564
NSN 6130-00-768-2863
NSN 6135-01-122-4448
NSN 6105-00-804-2683
NSN 5855-00-167-7893
NSN 6220-01-336-0130
NSN 5935-01-368-8854