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 5965-01-078-1312
NSN 6320-00-194-4252
NSN 6105-00-925-9906
NSN 6130-00-670-0880
NSN 2925-00-644-0028
NSN 2925-01-136-2551
NSN 5960-01-108-0457
NSN 5945-01-521-6896
NSN 6135-01-077-5705
NSN 6620-01-519-7234
NSN 5855-01-154-3871
NSN 5925-01-351-3660