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 5998-01-345-8789
NSN 5960-01-453-6170
NSN 6645-01-346-4505
NSN 5950-01-463-7280
NSN 6220-01-390-7341
NSN 5855-01-143-7051
NSN 5835-00-816-0394
NSN 6110-00-116-5514
NSN 6650-01-181-6037
NSN 4140-00-173-0706
NSN 6135-01-502-8771
NSN 5935-00-960-6260