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 6110-01-442-0371
NSN 5935-01-411-6199
NSN 5855-01-010-4921
NSN 6685-00-155-4301
NSN 6130-00-990-5759
NSN 5835-01-115-6067
NSN 6110-00-009-9334
NSN 5998-01-557-7217
NSN 6135-00-983-9187
NSN 5920-01-646-3539
NSN 6620-01-512-2016
NSN 5990-00-285-1948