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 5895-01-270-1018
NSN 7035-01-293-2457
NSN 6645-00-242-0480
NSN 6240-00-952-0099
NSN 5998-00-391-8662
NSN 5910-00-103-6437
NSN 5975-01-597-4770
NSN 5985-01-516-3978
NSN 6105-00-638-6230
NSN 6130-01-651-4463
NSN 5930-00-293-2492
NSN 6685-01-519-2359