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 5999-01-149-3162
NSN 5855-00-879-7245
NSN 4140-00-365-2531
NSN 5835-00-863-0959
NSN 5960-01-536-6398
NSN 5945-00-296-8464
NSN 5950-01-144-3241
NSN 5905-01-529-9383
NSN 5960-01-007-5838
NSN 6135-01-201-5858
NSN 5999-00-997-4099
NSN 6320-00-593-0379