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 4140-01-533-3139
NSN 5855-01-114-3513
NSN 6240-00-839-5118
NSN 6110-01-216-5593
NSN 6150-01-602-9098
NSN 6320-01-006-6138
NSN 6685-00-977-0858
NSN 5895-01-355-8584
NSN 6320-01-607-0347
NSN 5975-01-392-0436
NSN 5930-01-568-5845
NSN 5855-01-250-2421