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 6685-01-124-2347
NSN 5915-01-516-0459
NSN 5835-00-978-9806
NSN 5895-01-185-1988
NSN 6645-00-877-6002
NSN 6320-00-116-3658
NSN 5855-01-103-8650
NSN 6610-01-411-6800
NSN 5855-01-583-6497
NSN 2925-01-155-2994
NSN 5990-01-147-5225
NSN 6150-01-278-9840