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 5990-01-229-3003
NSN 6645-01-217-2888
NSN 5835-01-381-2683
NSN 6145-00-291-5388
NSN 7035-01-339-3665
NSN 5855-01-602-9335
NSN 6130-01-142-2698
NSN 7035-01-307-5366
NSN 5835-00-484-1529
NSN 5965-00-781-3578
NSN 5999-01-532-3517
NSN 5930-01-025-4623