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 5855-01-423-1497
NSN 6135-00-444-1402
NSN 5855-00-149-0766
NSN 5835-01-436-1797
NSN 6685-01-531-7654
NSN 5855-01-454-6956
NSN 6135-00-299-6918
NSN 5985-01-412-4961
NSN 6645-01-544-0408
NSN 5895-01-603-2429
NSN 5965-01-466-1154
NSN 5930-01-555-8484