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 5985-01-422-1552
NSN 5960-01-435-1167
NSN 5975-01-094-6943
NSN 5998-00-383-6191
NSN 6685-00-787-8594
NSN 5935-01-013-9384
NSN 6150-01-096-4776
NSN 5965-01-135-3679
NSN 6645-01-113-6712
NSN 6320-00-701-0437
NSN 5999-01-224-9528
NSN 5960-01-470-1579