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 6135-01-415-1163
NSN 5925-01-042-7584
NSN 2925-00-406-4381
NSN 5895-01-507-1127
NSN 5935-00-097-8940
NSN 6610-00-217-2194
NSN 5960-00-940-7976
NSN 6650-00-765-3239
NSN 6650-00-981-1336
NSN 5895-00-518-1593
NSN 5950-00-482-5105
NSN 6320-01-093-5738