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 5925-01-026-0891
NSN 6610-01-644-2546
NSN 5998-01-549-6034
NSN 6610-00-680-8325
NSN 5990-01-147-5225
NSN 6645-01-468-8895
NSN 6610-01-592-1551
NSN 6220-01-075-6547
NSN 6610-00-571-4846
NSN 6135-00-299-6918
NSN 5925-01-113-8272
NSN 5985-01-140-6950