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 5985-00-929-6174
NSN 5960-01-632-6576
NSN 6130-00-932-1381
NSN 5990-00-915-4531
NSN 5985-01-630-2567
NSN 5905-01-649-8803
NSN 5910-01-415-5023
NSN 6105-01-131-7140
NSN 6135-01-200-5144
NSN 6135-00-152-8729
NSN 2925-01-620-9673
NSN 6685-01-184-3985