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 6130-01-099-3411
NSN 5950-01-279-6826
NSN 6320-01-158-2177
NSN 5985-01-350-1246
NSN 5895-01-343-7800
NSN 6135-00-274-4037
NSN 6610-01-025-4718
NSN 5990-00-170-4239
NSN 5999-01-397-0192
NSN 6620-01-343-6671
NSN 6685-01-014-5983
NSN 2925-00-845-1480