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 5985-01-529-2658
NSN 5930-00-135-3535
NSN 6620-00-270-3275
NSN 6135-01-069-8575
NSN 6645-01-245-4341
NSN 6135-01-059-0069
NSN 2925-00-936-4333
NSN 6240-01-152-7046
NSN 5925-00-580-0869
NSN 6620-01-549-6653
NSN 6130-00-118-6185
NSN 5975-00-070-1819