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 6220-01-246-5064
NSN 6645-00-720-3953
NSN 6130-01-201-7047
NSN 6645-01-367-1316
NSN 5930-01-306-7799
NSN 2925-01-500-0730
NSN 5930-01-278-9052
NSN 6240-00-432-2705
NSN 6620-01-106-2814
NSN 5950-01-382-8209
NSN 5996-01-297-0740
NSN 5965-01-371-1297