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 5998-01-229-7092
NSN 5950-00-555-2881
NSN 6105-01-479-5494
NSN 6240-01-218-5187
NSN 5985-01-200-0177
NSN 5930-01-363-1702
NSN 6650-01-288-8279
NSN 6130-01-500-8281
NSN 5855-01-579-0062
NSN 2925-00-450-7783
NSN 6135-01-306-6549
NSN 6105-00-542-7948