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 6105-01-459-0061
NSN 6240-01-480-8996
NSN 5915-01-034-9461
NSN 6620-00-239-6153
NSN 6610-01-180-1920
NSN 5975-01-483-1515
NSN 5975-00-823-0054
NSN 6220-01-312-2678
NSN 5998-01-411-5141
NSN 5910-01-462-0401
NSN 6645-01-364-0867
NSN 2925-01-231-6312