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 5920-01-268-2188
NSN 6620-01-412-5514
NSN 5910-01-554-5324
NSN 5930-00-272-1427
NSN 6150-00-978-7338
NSN 5996-00-740-8315
NSN 6320-00-790-4844
NSN 5950-01-305-2828
NSN 5835-01-392-0575
NSN 5945-01-622-9082
NSN 5965-01-420-6613
NSN 5950-01-583-8433