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 6145-01-131-4094
NSN 6220-00-142-5115
NSN 5920-00-136-4823
NSN 5960-00-220-5164
NSN 5960-00-822-8326
NSN 6150-00-107-5490
NSN 5930-01-147-6035
NSN 6610-01-652-9477
NSN 7035-01-276-0355
NSN 6610-01-504-7622
NSN 6110-01-624-3328
NSN 6150-01-329-4346