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 5996-01-609-0098
NSN 5930-01-050-8424
NSN 6130-00-187-0211
NSN 4140-01-388-4289
NSN 6150-01-301-8185
NSN 5996-01-410-6984
NSN 6105-01-461-3287
NSN 6620-01-555-5218
NSN 5950-01-497-5754
NSN 5930-00-710-8237
NSN 5855-00-198-3197
NSN 6240-01-500-5829