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 5910-01-586-9177
NSN 6685-01-498-3960
NSN 6650-00-463-1514
NSN 5960-01-567-1096
NSN 6610-00-682-6215
NSN 5985-00-244-0841
NSN 5996-01-536-0812
NSN 5855-01-647-5398
NSN 6620-01-365-1499
NSN 5990-00-140-4559
NSN 5965-01-275-5472
NSN 5998-01-119-9648