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 6105-00-004-1276
NSN 6130-00-188-1969
NSN 5910-01-025-6987
NSN 6135-01-171-9299
NSN 7035-00-480-6767
NSN 5990-01-312-2638
NSN 5920-00-510-7656
NSN 5996-00-874-6601
NSN 5998-01-089-8180
NSN 5999-01-009-6497
NSN 5835-00-284-0882
NSN 6320-01-359-3921