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 5975-01-167-1819
NSN 4140-00-397-9252
NSN 5905-01-144-7932
NSN 5945-01-435-4909
NSN 6685-01-634-0611
NSN 5920-01-604-7087
NSN 6105-00-079-0863
NSN 5998-01-200-6649
NSN 5999-00-211-9736
NSN 5996-01-067-8716
NSN 6130-00-578-7702
NSN 5895-00-997-7284