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 5905-00-472-1699
NSN 7035-01-069-3537
NSN 5950-01-444-7295
NSN 2925-01-545-2717
NSN 5855-01-505-5144
NSN 5930-00-904-2143
NSN 6135-01-027-7543
NSN 6610-01-065-1073
NSN 6220-00-106-3092
NSN 5905-01-593-1820
NSN 5895-01-494-0338
NSN 5999-00-359-6016