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 6105-00-275-0826
NSN 5935-01-201-2336
NSN 5930-01-411-7207
NSN 6645-01-569-9087
NSN 5960-00-468-2952
NSN 6610-01-365-7796
NSN 5835-01-133-6485
NSN 7035-00-887-4674
NSN 5985-00-488-6257
NSN 5920-00-028-4339
NSN 6620-01-336-6646
NSN 5855-01-552-4759