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 5990-00-939-0461
NSN 5985-01-204-9040
NSN 6130-01-355-9723
NSN 6320-00-483-0451
NSN 5990-00-391-6207
NSN 5930-00-494-9915
NSN 6610-01-187-1748
NSN 6105-01-508-2852
NSN 5975-00-397-3713
NSN 5950-01-403-2852
NSN 5998-01-420-6855
NSN 6645-00-893-4190