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 5895-00-020-8929
NSN 5935-01-551-0789
NSN 6320-01-393-7022
NSN 5999-00-932-1316
NSN 6110-00-955-0900
NSN 6105-00-111-5681
NSN 5990-00-910-4500
NSN 4140-00-955-9019
NSN 6145-01-456-6635
NSN 6130-01-061-2841
NSN 6620-00-905-6590
NSN 5960-01-641-5493