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 6620-01-485-6459
NSN 5905-01-508-7551
NSN 5990-01-056-6413
NSN 5985-01-051-4964
NSN 5905-00-180-5776
NSN 5960-00-923-5047
NSN 5920-00-786-8241
NSN 6645-01-069-3286
NSN 5990-00-138-6775
NSN 5905-00-471-5556
NSN 6145-01-477-3504
NSN 5855-01-425-1330