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 5998-01-257-5573
NSN 5835-01-473-1620
NSN 5999-01-371-1378
NSN 5985-00-675-8901
NSN 5945-01-337-9150
NSN 6130-00-324-8430
NSN 5855-01-623-6879
NSN 6150-00-842-0873
NSN 5990-01-312-2638
NSN 5960-01-112-0721
NSN 5910-01-207-0833
NSN 6135-01-260-1100