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 5915-00-121-4190
NSN 5999-01-645-4854
NSN 6220-01-492-5018
NSN 6145-01-280-9452
NSN 6150-01-287-2175
NSN 6620-00-127-6134
NSN 6105-01-475-4115
NSN 6320-00-593-0379
NSN 6220-01-462-0236
NSN 6620-01-106-9100
NSN 6685-01-555-7938
NSN 6240-01-187-7758