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 4140-01-501-1352
NSN 6150-01-480-4655
NSN 6645-00-928-7208
NSN 5855-01-180-5369
NSN 6650-01-005-8570
NSN 5935-00-842-5517
NSN 5910-01-074-0190
NSN 6645-00-020-2787
NSN 6320-01-449-1014
NSN 6145-00-278-0697
NSN 5835-00-493-8115
NSN 5930-01-129-9505