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 5835-01-219-0586
NSN 5950-01-363-1077
NSN 5960-01-228-6549
NSN 5925-01-439-4552
NSN 6135-01-598-9890
NSN 6685-01-378-7090
NSN 6150-00-636-8938
NSN 5855-01-051-4143
NSN 6620-00-255-5962
NSN 6105-01-176-6857
NSN 5996-00-932-5301
NSN 5905-00-275-1124