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 6620-00-621-6951
NSN 5855-00-631-4565
NSN 5910-01-214-3613
NSN 5985-01-464-5302
NSN 5985-01-382-9220
NSN 5975-01-301-5871
NSN 6645-01-629-6343
NSN 6685-00-166-2509
NSN 5999-01-280-5496
NSN 5835-01-094-2662
NSN 5960-01-035-7496
NSN 5950-01-328-0916