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 5996-00-229-7037
NSN 5855-01-267-2751
NSN 7035-00-369-6346
NSN 6320-00-405-2348
NSN 6320-01-006-6138
NSN 6685-00-496-9090
NSN 5996-01-204-9747
NSN 6620-01-642-9678
NSN 2925-00-081-6835
NSN 6135-00-995-1089
NSN 5960-01-241-1844
NSN 5935-01-221-6469