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 5985-00-237-1444
NSN 6135-00-276-7625
NSN 5930-00-838-1716
NSN 6145-00-153-2818
NSN 5855-00-411-8688
NSN 6145-01-607-4059
NSN 5960-01-131-4086
NSN 5996-01-510-5431
NSN 5930-00-870-2645
NSN 6610-00-848-4764
NSN 5945-01-276-3767
NSN 6685-01-576-2856