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 5855-01-464-3152
NSN 6105-01-310-9062
NSN 5950-01-418-5035
NSN 6110-01-361-5997
NSN 5915-00-020-6783
NSN 5915-01-025-1362
NSN 5935-01-399-2525
NSN 5950-00-100-1345
NSN 6130-01-058-8823
NSN 5950-01-454-8210
NSN 5950-00-583-4987
NSN 6130-00-086-8346