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 5999-00-977-7869
NSN 6110-00-405-4903
NSN 5895-01-020-7771
NSN 6650-01-247-6623
NSN 6645-00-226-2270
NSN 6610-01-650-6364
NSN 5985-01-254-2976
NSN 2925-01-407-4958
NSN 5935-01-356-7414
NSN 5999-00-055-1042
NSN 6650-01-103-7342
NSN 6620-01-371-1655