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 6135-00-764-8680
NSN 6145-01-420-6132
NSN 5998-00-504-8113
NSN 6610-01-305-8863
NSN 5835-00-356-3825
NSN 6110-00-115-5873
NSN 5905-00-225-9029
NSN 5960-01-029-4253
NSN 5998-01-024-1160
NSN 5990-01-602-6701
NSN 5996-01-364-7934
NSN 5998-01-510-2316