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 6650-01-518-8295
NSN 7035-00-235-3529
NSN 5998-01-029-2909
NSN 5950-01-111-3830
NSN 6645-01-633-1852
NSN 5985-01-285-7938
NSN 4140-01-608-3992
NSN 5920-00-939-4637
NSN 6110-00-482-3372
NSN 6610-01-646-1609
NSN 5985-00-675-8901
NSN 6145-00-814-8128