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 7035-00-135-4758
NSN 6620-01-262-9489
NSN 6135-01-051-7836
NSN 6130-00-728-9621
NSN 5950-00-300-3714
NSN 6145-01-573-5891
NSN 5998-01-551-1576
NSN 5915-01-118-0487
NSN 5950-01-652-8426
NSN 6220-01-363-1312
NSN 6240-00-068-0249
NSN 6645-01-113-8979