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 5910-01-355-8782
NSN 5935-01-100-2659
NSN 5915-01-026-8569
NSN 2925-00-660-8131
NSN 6620-00-251-0569
NSN 5965-00-079-2360
NSN 6645-01-076-4655
NSN 5925-01-231-5423
NSN 5960-00-062-4906
NSN 6620-01-492-4271
NSN 6610-01-031-7248
NSN 6110-01-416-1164