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 6110-01-542-2263
NSN 6240-01-503-5809
NSN 5935-00-916-5459
NSN 6645-01-071-0727
NSN 5985-01-631-9080
NSN 6645-01-360-4562
NSN 6645-00-192-1152
NSN 5945-01-439-5110
NSN 6150-01-295-5951
NSN 7035-01-576-9617
NSN 5965-01-508-2537
NSN 6130-01-524-9253