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 5985-00-145-7135
NSN 5930-01-220-8280
NSN 5905-00-519-0582
NSN 5950-01-248-2241
NSN 5855-01-351-6875
NSN 5930-00-073-4289
NSN 6620-01-170-8270
NSN 5905-00-186-0942
NSN 5990-00-138-2730
NSN 2925-00-095-9451
NSN 6650-00-023-1638
NSN 5985-01-463-3283