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 6610-01-278-9387
NSN 6240-01-459-8758
NSN 6110-01-494-9380
NSN 6150-01-482-8369
NSN 4140-01-005-5364
NSN 2925-01-342-1712
NSN 6110-01-367-2165
NSN 5910-01-312-4725
NSN 5965-00-408-5501
NSN 5895-00-287-6375
NSN 6150-00-279-9337
NSN 6610-00-581-0771