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 6645-01-269-8377
NSN 6610-00-859-1862
NSN 5930-01-014-4406
NSN 5925-00-988-2508
NSN 6645-00-222-2785
NSN 5895-01-223-5401
NSN 5920-00-267-3109
NSN 6135-00-228-8140
NSN 5920-00-336-9055
NSN 5998-01-059-2997
NSN 5855-01-111-3962
NSN 5915-00-597-2369