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 6320-01-383-9979
NSN 6620-01-398-8986
NSN 4140-00-767-8166
NSN 6145-01-113-8205
NSN 4140-00-652-1396
NSN 6130-01-384-2191
NSN 6110-01-513-9173
NSN 5915-01-403-2599
NSN 6610-01-189-3001
NSN 5999-01-125-9354
NSN 5835-01-447-2544
NSN 5990-00-103-0528