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 5925-01-266-1093
NSN 5905-01-652-6772
NSN 5930-00-777-3467
NSN 5930-01-076-0412
NSN 5935-00-208-4734
NSN 5996-00-934-8729
NSN 7035-00-731-8729
NSN 6650-00-927-3391
NSN 2925-01-576-6206
NSN 2925-01-464-3093
NSN 5960-00-139-3204
NSN 6610-01-470-4684