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 6220-01-189-4922
NSN 6110-00-918-3680
NSN 5925-00-275-0380
NSN 6145-01-446-3779
NSN 5925-01-432-0547
NSN 5835-01-399-5820
NSN 6610-00-951-2735
NSN 5855-01-492-7800
NSN 5905-01-264-4357
NSN 5835-01-202-1376
NSN 5990-01-605-9026
NSN 5925-01-228-4534