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 5835-01-310-8979
NSN 2925-01-408-9485
NSN 6105-01-195-0524
NSN 5855-01-134-7106
NSN 6650-01-481-1165
NSN 5895-00-415-6054
NSN 5925-01-526-1912
NSN 6145-00-262-3345
NSN 6220-01-075-6547
NSN 5950-01-281-8172
NSN 2925-01-231-6312
NSN 5855-01-258-6180