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 6320-01-443-0974
NSN 5855-00-949-8143
NSN 6150-01-360-5209
NSN 4140-00-707-5963
NSN 5925-00-261-8166
NSN 5945-01-381-1356
NSN 6240-01-458-4384
NSN 4140-01-259-5828
NSN 6150-01-285-2473
NSN 6650-00-233-0705
NSN 5999-00-707-6083
NSN 4140-00-391-9447