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 6145-01-145-7005
NSN 6240-01-142-8453
NSN 5950-01-085-5632
NSN 6620-01-062-1662
NSN 5915-01-403-2599
NSN 6645-01-413-0515
NSN 2925-00-781-1273
NSN 5985-01-096-1877
NSN 5925-00-403-2571
NSN 5930-01-363-5276
NSN 6610-01-200-5887
NSN 6105-01-306-9199