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 5930-00-702-4692
NSN 6685-01-258-0416
NSN 5930-00-435-8261
NSN 5996-01-256-6673
NSN 5985-00-208-0572
NSN 6240-01-323-5386
NSN 6610-00-822-0431
NSN 6685-01-371-9207
NSN 5925-00-407-1961
NSN 7035-01-606-9591
NSN 5835-01-099-1514
NSN 6150-01-573-7193