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 6135-01-455-7754
NSN 5945-01-528-6909
NSN 5945-01-081-5478
NSN 5945-00-725-7503
NSN 6220-00-141-5436
NSN 6220-01-336-0130
NSN 5965-01-416-4059
NSN 6135-01-159-9705
NSN 5905-00-820-5498
NSN 6620-00-008-0213
NSN 5998-00-845-4873
NSN 5950-00-939-0401