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 4140-00-329-8404
NSN 5990-01-353-3691
NSN 5975-01-234-0573
NSN 6130-01-489-0295
NSN 6130-01-227-5538
NSN 5925-01-574-7690
NSN 5895-01-442-4770
NSN 5920-00-089-4130
NSN 6150-01-378-6065
NSN 5965-01-364-1083
NSN 5920-01-195-3859
NSN 6105-01-529-5705