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 5925-01-277-7066
NSN 6110-01-019-0811
NSN 5920-00-238-6491
NSN 5895-01-217-1470
NSN 6130-00-155-5873
NSN 6130-00-862-5516
NSN 6685-00-736-1569
NSN 5990-01-291-0600
NSN 5905-01-303-5617
NSN 6135-01-571-7488
NSN 5935-01-415-3906
NSN 6620-01-597-0512