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 5975-01-513-8394
NSN 5998-01-437-6693
NSN 5975-01-192-2908
NSN 5895-01-266-0223
NSN 5985-00-476-4573
NSN 5999-01-006-8631
NSN 6240-00-235-5159
NSN 6130-01-240-5636
NSN 5990-00-410-6202
NSN 2925-00-872-4474
NSN 5975-01-622-7488
NSN 6685-00-689-5063