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 4140-01-063-7192
NSN 5925-01-469-6068
NSN 6150-00-898-0547
NSN 5999-00-086-1356
NSN 5950-00-970-9081
NSN 5935-01-181-3593
NSN 6135-00-851-8575
NSN 5945-00-042-9442
NSN 5905-00-891-3647
NSN 6145-01-036-4497
NSN 5895-01-341-7918
NSN 6110-00-578-7243