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 6320-01-046-5228
NSN 7035-00-403-5340
NSN 6650-01-486-8324
NSN 2925-00-964-7128
NSN 2925-01-570-3696
NSN 6220-01-361-9765
NSN 5835-01-384-3206
NSN 4140-01-111-7416
NSN 5910-01-065-7400
NSN 5905-01-548-3846
NSN 5930-01-504-8581
NSN 5835-00-880-6477