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 5975-00-117-0826
NSN 6105-00-088-5080
NSN 6610-00-072-0255
NSN 7035-00-093-5840
NSN 6110-00-216-6911
NSN 5960-00-939-8124
NSN 5925-00-768-0751
NSN 6685-00-990-3694
NSN 6320-01-212-8749
NSN 6685-00-735-2381
NSN 6150-01-462-9202
NSN 5975-01-373-7679