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 5910-01-420-7423
NSN 5950-01-515-4810
NSN 6220-01-427-2333
NSN 5950-00-111-4720
NSN 6645-00-967-3429
NSN 5910-01-139-0095
NSN 6135-00-299-6918
NSN 5935-01-046-7459
NSN 5895-01-087-9941
NSN 5855-00-149-0766
NSN 5996-01-227-2555
NSN 6645-01-182-4896