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 5835-01-548-5864
NSN 5960-00-114-4916
NSN 5930-00-051-6383
NSN 5935-01-113-7853
NSN 5998-01-611-3369
NSN 5895-01-222-0639
NSN 5920-01-218-1733
NSN 6645-01-203-3529
NSN 6240-01-616-1698
NSN 2925-01-463-8856
NSN 6135-01-084-1609
NSN 5895-01-352-5695