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 6135-00-983-9187
NSN 5999-01-634-0576
NSN 5835-01-566-5462
NSN 2925-01-327-3069
NSN 5945-00-849-1124
NSN 5960-01-424-1781
NSN 5895-01-022-9255
NSN 6110-01-587-6982
NSN 6650-00-139-5459
NSN 5905-01-501-0490
NSN 5950-00-167-1701
NSN 5998-00-762-8369