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 6110-01-345-8240
NSN 5905-00-144-8450
NSN 6240-00-855-4518
NSN 5960-01-411-5899
NSN 7035-01-227-2546
NSN 5895-00-225-9589
NSN 5915-01-170-6753
NSN 6650-01-310-7403
NSN 6130-00-566-0347
NSN 5910-00-857-8654
NSN 6150-01-591-7175
NSN 4140-01-424-3271