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 6320-00-194-4252
NSN 5835-01-510-1873
NSN 6610-01-065-6057
NSN 5915-00-054-6637
NSN 6110-00-080-2767
NSN 6645-00-215-0102
NSN 5945-00-965-6133
NSN 5910-00-908-6594
NSN 6620-01-265-2887
NSN 5985-01-454-8387
NSN 6620-01-575-9561
NSN 6110-01-322-8024