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 6110-01-123-7285
NSN 5996-01-140-6084
NSN 5945-01-406-3495
NSN 4140-00-034-0811
NSN 6650-01-294-3503
NSN 5999-01-351-0718
NSN 5998-00-831-2233
NSN 6645-01-385-7033
NSN 7035-00-549-2722
NSN 5920-00-445-0027
NSN 6220-00-615-2168
NSN 6220-01-339-0067