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 6620-01-236-0138
NSN 5855-00-688-9954
NSN 5985-01-497-1165
NSN 6645-01-571-1234
NSN 5960-01-462-7704
NSN 5930-00-165-2650
NSN 4140-01-015-0124
NSN 6685-01-165-8963
NSN 6135-00-461-3590
NSN 2925-01-289-6448
NSN 5945-00-300-0903
NSN