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 6135-01-388-2761
NSN 5835-00-911-6330
NSN 4140-01-435-5412
NSN 5975-00-994-0956
NSN 4140-01-465-8611
NSN 6620-01-065-8265
NSN 6610-00-314-2605
NSN 5925-01-435-4943
NSN 5998-00-432-6173
NSN 5960-00-070-4399
NSN 5920-01-476-8278
NSN 5855-00-832-9341