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 5855-01-327-5129
NSN 5960-01-595-6515
NSN 5998-00-477-2707
NSN 5905-01-314-8473
NSN 5910-00-548-9888
NSN 6610-01-010-7108
NSN 6145-00-099-8986
NSN 5999-00-602-8566
NSN 5965-01-432-1943
NSN 5965-01-633-1281
NSN 6320-01-631-7828
NSN 5915-01-454-3858