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 5985-01-430-2570
NSN 5999-00-998-8495
NSN 7035-01-492-5271
NSN 5855-01-203-4719
NSN 5855-00-688-9954
NSN 5999-00-299-0840
NSN 5925-00-879-2184
NSN 5835-01-104-5497
NSN 6650-00-187-5388
NSN 5930-01-142-7058
NSN 5990-01-160-6978
NSN 6320-01-627-8295