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 4140-01-432-1447
NSN 5905-00-476-4673
NSN 5910-00-823-6310
NSN 5990-01-094-7740
NSN 5905-01-475-8616
NSN 6645-01-479-5364
NSN 2925-01-055-9705
NSN 5985-01-551-8701
NSN 6240-01-382-2528
NSN 5999-01-603-5779
NSN 5920-00-151-4039
NSN 6105-01-446-6527