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 7035-00-433-5670
NSN 5910-00-009-4744
NSN 6220-01-367-2923
NSN 6685-01-577-0443
NSN 5930-01-399-8713
NSN 6650-01-148-5307
NSN 5965-00-804-1374
NSN 6150-00-008-8633
NSN 6150-00-901-7264
NSN 6610-01-102-2256
NSN 5990-00-150-6979
NSN 5925-00-361-8836