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 5945-01-012-2235
NSN 5945-01-025-5956
NSN 6610-01-227-1692
NSN 6320-00-925-0558
NSN 6610-01-167-8747
NSN 6135-00-982-1882
NSN 6130-01-351-3182
NSN 6650-01-363-9043
NSN 6130-00-356-1702
NSN 6610-00-890-9099
NSN 6620-01-386-5914
NSN 6135-00-377-9165