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 6685-01-093-1276
NSN 5950-01-155-7339
NSN 5895-01-417-2700
NSN 5925-01-374-2889
NSN 5999-00-033-7341
NSN 6135-00-985-7887
NSN 5950-01-281-6568
NSN 6610-01-426-3514
NSN 6610-01-380-2087
NSN 6645-00-172-8718
NSN 7035-01-325-0536
NSN 6220-01-310-0212