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 6620-00-658-6588
NSN 6620-00-988-0976
NSN 7035-01-432-2424
NSN 6135-01-397-2170
NSN 6620-00-916-3134
NSN 5999-01-419-9880
NSN 5998-00-764-5623
NSN 5998-01-034-8332
NSN 5996-01-650-3525
NSN 5990-01-560-7032
NSN 6620-01-083-4672
NSN 2925-01-629-4600