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 6145-01-038-9725
NSN 6145-01-522-2739
NSN 5998-01-275-0153
NSN 6130-01-163-1251
NSN 7035-01-382-4413
NSN 5960-01-489-1510
NSN 5950-01-419-4534
NSN 2925-00-163-4543
NSN 5975-01-176-9424
NSN 7035-00-104-7613
NSN 5998-01-438-8535
NSN 6610-00-661-1797