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 5920-00-422-5517
NSN 5985-01-586-2196
NSN 5920-01-012-3805
NSN 6610-01-038-7486
NSN 5905-01-540-7442
NSN 2925-01-368-5773
NSN 6685-01-577-9681
NSN 4140-01-152-2672
NSN 5950-01-528-7143
NSN 5915-01-355-9617
NSN 5855-01-538-8616
NSN 6135-00-161-0746