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 6220-00-554-5937
NSN 6650-01-372-1877
NSN 5965-01-046-9619
NSN 6145-01-529-6566
NSN 6110-01-615-2925
NSN 5960-01-425-1454
NSN 6620-01-385-6172
NSN 5985-00-023-2211
NSN 5985-00-883-9092
NSN 5925-01-039-5391
NSN 4140-01-462-0268
NSN 5855-00-862-3345