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 5920-01-522-6363
NSN 5985-01-501-5040
NSN 5930-01-207-7023
NSN 6220-01-318-8918
NSN 6220-01-019-4090
NSN 5965-01-463-2815
NSN 5996-00-032-3592
NSN 6685-00-193-0201
NSN 5905-00-985-1309
NSN 5965-01-033-9352
NSN 6645-01-563-9514
NSN 5935-01-493-8716