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 6135-01-216-9771
NSN 5930-01-407-7145
NSN 5895-01-454-6751
NSN 5975-01-157-4305
NSN 5935-00-407-5469
NSN 5975-01-200-3379
NSN 6150-01-120-8487
NSN 6645-01-394-5149
NSN 5950-01-183-8505
NSN 6150-01-227-2595
NSN 4140-01-440-9203
NSN 5930-01-594-0288