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 6620-01-023-9330
NSN 5905-00-836-8577
NSN 5965-01-009-9090
NSN 6145-01-099-9114
NSN 6150-00-225-5565
NSN 6240-01-384-3887
NSN 5950-01-465-4965
NSN 6145-01-054-7463
NSN 5998-01-592-8659
NSN 6105-01-574-6423
NSN 5975-01-195-1533
NSN 5985-01-643-5450