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 5835-00-463-6699
NSN 5895-00-116-7411
NSN 6685-01-541-4932
NSN 6145-01-227-0659
NSN 5960-00-584-4553
NSN 6620-01-353-9224
NSN 6240-00-784-0740
NSN 5920-01-288-6591
NSN 6145-01-426-1640
NSN 6105-01-516-1927
NSN 5855-01-641-2736
NSN 5998-01-393-0013