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 5935-00-367-4043
NSN 5975-01-629-3338
NSN 5920-00-802-0666
NSN 6150-01-208-8970
NSN 6620-01-319-6008
NSN 6240-01-019-1997
NSN 6105-01-437-5596
NSN 5985-00-009-3866
NSN 6685-00-122-3873
NSN 5855-00-548-4742
NSN 5975-01-062-2174
NSN 5925-01-218-8302