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 5915-01-173-1778
NSN 7035-00-834-2090
NSN 5998-01-659-9827
NSN 6220-00-723-0424
NSN 6110-00-378-8458
NSN 6220-01-142-3148
NSN 5910-01-247-9375
NSN 6145-01-262-0069
NSN 6135-00-062-5080
NSN 6645-01-426-8621
NSN 6110-00-157-1699
NSN 6105-01-136-8865