Material is steel, federal standard no. 66; steel no.S 1008 to 1022
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 6145-01-127-1622
NSN 4140-00-893-2754
NSN 6130-00-578-5315
NSN 6645-00-392-8728
NSN 5985-00-265-2885
NSN 6320-00-194-4252
NSN 5905-00-224-0744
NSN 6110-00-508-5892
NSN 5998-01-433-1239
NSN 6620-01-428-3930
NSN 2925-00-770-4713
NSN 5998-01-010-8881