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 5975-01-647-9538
NSN 5996-01-167-9234
NSN 5985-01-411-8658
NSN 5935-01-113-9391
NSN 5965-00-265-7861
NSN 5905-01-021-4678
NSN 6110-01-027-1172
NSN 6130-01-473-1805
NSN 5985-01-038-9946
NSN 5965-01-496-4765
NSN 5985-01-137-4620
NSN 5998-01-519-9273