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 5985-00-008-5768
NSN 5965-01-514-0932
NSN 5910-01-220-0730
NSN 5975-00-754-5299
NSN 5999-01-065-1646
NSN 5905-00-517-7059
NSN 6685-01-334-5274
NSN 6220-00-702-0677
NSN 6685-01-212-9607
NSN 5990-01-432-4249
NSN 5905-01-606-7783
NSN 5930-01-646-1842