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 6220-00-804-9270
NSN 2925-00-275-1807
NSN 6135-01-596-3145
NSN 5855-01-256-2551
NSN 6645-00-526-9476
NSN 6610-01-155-4060
NSN 6135-01-328-0639
NSN 5935-01-234-9288
NSN 5895-01-571-7505
NSN 6110-00-899-2505
NSN 5975-00-480-0114
NSN 2925-00-149-0760