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 5835-01-519-2916
NSN 6620-01-469-7828
NSN 5950-01-605-1386
NSN 5945-00-269-4035
NSN 6620-00-581-8984
NSN 6610-01-301-3513
NSN 5999-00-129-1950
NSN 5855-01-439-1838
NSN 6130-00-141-8317
NSN 2925-01-032-3814
NSN 7035-01-280-4692
NSN 6240-01-340-5784