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 2925-00-295-8109
NSN 5945-00-432-0052
NSN 6110-01-144-9744
NSN 6320-01-393-7022
NSN 5998-01-606-0629
NSN 6105-00-099-8818
NSN 5996-01-467-9391
NSN 5996-00-553-7348
NSN 5999-01-085-6713
NSN 6145-00-865-7197
NSN 5915-00-764-1225
NSN 6130-01-111-3205