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 5990-01-465-9235
NSN 6110-00-349-9331
NSN 6685-01-440-7214
NSN 7035-00-104-7613
NSN 5935-00-436-2087
NSN 6650-00-996-9132
NSN 5905-00-292-1113
NSN 6650-01-399-8552
NSN 6610-01-509-9913
NSN 5998-01-460-7058
NSN 6220-00-551-0704
NSN 6150-01-411-5216