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 5835-01-426-6573
NSN 4140-00-764-5287
NSN 5925-00-990-0238
NSN 5835-01-227-2318
NSN 6145-00-763-6077
NSN 5920-01-501-0995
NSN 6145-01-536-5649
NSN 5925-01-280-8390
NSN 5905-01-145-0335
NSN 7035-01-283-2536
NSN 5990-01-039-0898
NSN 5990-00-391-6207