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 5895-01-500-7540
NSN 6110-00-161-4115
NSN 6685-00-010-1420
NSN 5835-01-382-4592
NSN 5855-01-632-5485
NSN 5975-00-518-4977
NSN 5905-01-385-4295
NSN 6130-01-024-1679
NSN 6110-01-442-7894
NSN 5930-00-916-6449
NSN 2925-01-539-9795
NSN 2925-01-219-9471