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 5895-00-823-8571
NSN 5975-01-401-5355
NSN 6130-00-412-9405
NSN 5910-01-310-7585
NSN 7035-00-131-8219
NSN 5999-01-310-4532
NSN 6130-01-303-6776
NSN 7035-00-111-4389
NSN 5855-01-400-1590
NSN 5935-01-508-4753
NSN 6645-01-583-8153
NSN 5996-00-023-0683