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 6645-00-495-6797
NSN 6650-01-138-8174
NSN 6240-01-280-3382
NSN 5996-01-042-0789
NSN 5950-00-445-7549
NSN 5985-01-583-2447
NSN 5915-00-931-3757
NSN 5990-00-609-4279
NSN 5910-00-388-6737
NSN 5835-00-180-7555
NSN 5950-01-606-9146
NSN 6240-01-134-2419