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 5855-01-606-9511
NSN 6650-00-122-9452
NSN 5925-01-192-8890
NSN 5915-00-271-2321
NSN 7035-00-455-7666
NSN 5910-01-256-8089
NSN 5999-00-078-9347
NSN 5996-01-193-7529
NSN 6650-00-877-6972
NSN 6610-00-060-0871
NSN 6145-00-906-2029
NSN 2925-01-052-0636