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 6150-00-303-1565
NSN 5996-01-207-0804
NSN 5985-01-643-4361
NSN 6130-01-035-3900
NSN 5935-01-367-2245
NSN 5965-00-630-7872
NSN 6320-01-283-9370
NSN 5996-01-644-2883
NSN 6650-00-476-2925
NSN 5975-01-256-3415
NSN 5945-01-219-7623
NSN 6645-01-058-8877