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 5920-01-248-8386
NSN 5960-00-257-4203
NSN 6240-00-027-3420
NSN 5950-01-612-3762
NSN 5990-00-518-0684
NSN 5999-01-617-5134
NSN 2925-01-153-7794
NSN 5855-01-589-7273
NSN 5960-01-299-9182
NSN 6105-01-073-0611
NSN 6150-00-666-3635
NSN 6150-01-576-9956