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 6610-01-658-6611
NSN 5998-00-963-9021
NSN 6240-01-278-4714
NSN 6685-01-441-2198
NSN 6650-01-464-8293
NSN 5935-01-093-7347
NSN 6220-01-142-3148
NSN 5925-01-013-5046
NSN 5895-01-634-0630
NSN 5960-01-522-0391
NSN 6145-01-543-4429
NSN 6105-01-246-2210