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 5985-01-360-5617
NSN 5960-01-577-5682
NSN 5915-01-535-7478
NSN 5998-00-217-2162
NSN 6145-00-431-8376
NSN 2925-01-565-6410
NSN 6135-00-973-5632
NSN 5985-00-995-4709
NSN 5855-01-444-9182
NSN 6620-00-856-2353
NSN 6105-01-137-9274
NSN 6645-00-690-0423