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 5950-00-957-0712
NSN 5945-01-107-5502
NSN 5960-00-014-0519
NSN 5910-01-202-7516
NSN 6135-01-168-2944
NSN 5950-01-214-3096
NSN 6150-00-071-1180
NSN 6645-01-556-5263
NSN 5985-01-373-7402
NSN 5835-01-541-9991
NSN 5920-01-398-0580
NSN 2925-00-193-2402