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 6130-01-432-2415
NSN 5920-00-373-3636
NSN 6135-01-633-8502
NSN 6320-00-931-4855
NSN 5935-01-456-2828
NSN 5999-01-089-4562
NSN 6135-01-222-0703
NSN 5895-01-074-2393
NSN 6610-00-305-2627
NSN 5990-01-243-4233
NSN 5985-00-216-4961
NSN 2925-01-633-4048