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 5915-01-094-2942
NSN 6650-01-442-7893
NSN 5998-00-205-2951
NSN 6150-01-202-1005
NSN 5990-00-111-3614
NSN 5996-01-088-7074
NSN 5985-00-056-4744
NSN 5910-01-409-2852
NSN 6240-01-359-2721
NSN 5990-00-382-5885
NSN 4140-01-500-2334
NSN 5996-00-076-2267