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 6610-01-314-1611
NSN 6650-01-529-6416
NSN 5999-00-771-1387
NSN 6150-00-928-9736
NSN 6105-01-552-0210
NSN 5935-01-601-7939
NSN 6150-01-436-9774
NSN 6150-00-518-4558
NSN 5915-01-243-6682
NSN 4140-01-519-9343
NSN 4140-01-202-1032
NSN 5960-01-536-9763