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 6110-00-567-0611
NSN 6650-01-434-0331
NSN 6130-01-374-6005
NSN 5920-00-061-7187
NSN 5996-01-057-1981
NSN 5985-01-491-0419
NSN 5950-01-050-3937
NSN 6240-01-495-3184
NSN 5960-01-097-3285
NSN 4140-01-146-5409
NSN 6130-00-052-7621
NSN 6685-01-390-8642