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 5945-01-457-3162
NSN 6130-01-099-9800
NSN 5996-01-631-8490
NSN 5996-01-284-3185
NSN 6610-01-224-6669
NSN 5975-01-050-9018
NSN 6650-01-112-8567
NSN 6105-01-322-4071
NSN 5950-01-010-9451
NSN 6320-01-388-3125
NSN 6620-01-334-8938
NSN 5855-00-145-3307