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 5925-00-485-9175
NSN 5895-01-058-8677
NSN 6220-00-784-5904
NSN 6135-00-491-9864
NSN 5990-00-304-7038
NSN 6320-00-149-7570
NSN 5960-01-624-1170
NSN 6685-01-218-8199
NSN 5996-01-327-6853
NSN 7035-01-033-0612
NSN 5950-00-062-3348
NSN 6150-00-284-1369