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 5855-01-279-9938
NSN 6105-01-249-6197
NSN 6650-01-412-1040
NSN 5965-00-147-3070
NSN 6110-01-327-2006
NSN 6220-01-357-7675
NSN 5925-00-647-3469
NSN 5905-01-057-2038
NSN 5999-00-279-4029
NSN 6320-01-220-2264
NSN 6320-00-070-4544
NSN 5999-01-542-1316