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 5990-00-956-9130
NSN 5935-01-311-6819
NSN 5905-01-599-8508
NSN 5855-00-631-4565
NSN 5905-01-589-9782
NSN 2925-00-422-5159
NSN 2925-01-225-0713
NSN 6135-01-394-4160
NSN 5905-00-276-8597
NSN 6685-00-753-2896
NSN 7035-01-499-0680
NSN 6135-00-080-9176