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 5985-01-351-1164
NSN 6650-00-840-9758
NSN 6650-01-409-1992
NSN 5930-00-857-6742
NSN 6610-01-263-5517
NSN 6130-01-504-1569
NSN 5915-01-653-0627
NSN 6130-01-487-8699
NSN 6135-01-309-8414
NSN 5905-01-432-0872
NSN 4140-01-333-1439
NSN 5965-01-480-8784