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 5960-01-237-8995
NSN 5945-00-166-6330
NSN 5835-01-464-2662
NSN 5960-00-287-9932
NSN 6645-00-171-9639
NSN 6135-01-247-5660
NSN 5855-01-321-3881
NSN 2925-00-802-9387
NSN 5975-01-417-9229
NSN 5905-01-042-2763
NSN 6610-01-232-0814
NSN 5895-00-452-0333