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 5965-00-163-5113
NSN 6110-01-181-4520
NSN 5996-00-007-3708
NSN 6320-01-532-7491
NSN 6610-01-333-9543
NSN 5960-01-411-5899
NSN 6220-01-136-6839
NSN 5855-00-494-9581
NSN 6145-01-500-4002
NSN 6650-01-145-3731
NSN 6105-01-105-0042
NSN 5945-00-759-1580