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 6685-00-242-2224
NSN 6110-01-202-0459
NSN 6130-01-409-1443
NSN 5996-01-412-7936
NSN 6110-00-211-7435
NSN 5935-01-322-8562
NSN 5985-01-238-5329
NSN 5905-01-607-6903
NSN 5855-01-130-1501
NSN 5925-01-504-2852
NSN 6610-00-798-8562
NSN 5835-00-484-1529