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 5915-01-157-9799
NSN 6105-00-932-0229
NSN 6610-01-297-1492
NSN 6145-01-567-2677
NSN 5975-00-343-0370
NSN 6220-01-122-3155
NSN 6685-01-387-9084
NSN 5960-01-530-0581
NSN 5905-00-465-5087
NSN 6135-01-168-2944
NSN 6135-01-472-9011
NSN 5910-00-107-7788