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 5945-00-163-6975
NSN 6150-01-420-8386
NSN 5945-01-623-5308
NSN 5960-01-585-6385
NSN 6220-01-381-1771
NSN 6620-01-525-8648
NSN 6110-01-330-4906
NSN 5960-01-418-4875
NSN 6145-01-195-9844
NSN 6650-01-103-7342
NSN 6110-01-338-4597
NSN 5925-01-433-2946