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 5996-01-521-0367
NSN 6610-00-626-8523
NSN 5920-01-623-7756
NSN 5920-01-412-0629
NSN 2925-00-603-9371
NSN 6145-00-058-2436
NSN 5915-01-253-6254
NSN 6650-01-120-6231
NSN 6320-01-246-4390
NSN 6620-00-804-8272
NSN 5990-00-110-1153
NSN 6610-00-592-9012