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 5975-00-089-2143
NSN 5920-00-484-8074
NSN 2925-01-574-3246
NSN 5930-00-678-8433
NSN 6320-01-442-3428
NSN 6220-01-412-9600
NSN 2925-01-265-2853
NSN 6105-01-465-6505
NSN 5895-00-170-4568
NSN 5925-01-024-9568
NSN 6135-01-272-4047
NSN 5990-01-390-2177