Material is steel, federal standard no. 66; steel no.S 1008 to 1022
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 5996-01-045-4131
NSN 5965-00-901-6203
NSN 6110-01-098-1202
NSN 7035-00-108-4421
NSN 6685-00-155-4301
NSN 6240-00-469-2339
NSN 5920-01-442-3140
NSN 5945-01-528-4749
NSN 5910-01-423-3357
NSN 5925-00-078-9566
NSN 5996-00-158-9572
NSN 6320-01-021-6633