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 5998-01-588-9890
NSN 6145-00-915-5546
NSN 5990-00-464-6385
NSN 6105-01-641-2118
NSN 5945-00-661-0506
NSN 2925-00-816-8765
NSN 6110-01-429-5680
NSN 5945-01-093-6697
NSN 5960-01-054-3752
NSN 6650-01-602-7567
NSN 6130-01-181-5475
NSN 6610-00-446-2880