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 5925-01-180-9353
NSN 2925-01-251-9529
NSN 5950-00-392-1719
NSN 5998-00-633-5169
NSN 6610-01-438-4383
NSN 6220-01-330-4425
NSN 5910-01-170-4002
NSN 6645-01-274-3384
NSN 5835-00-113-6090
NSN 5996-01-486-0462
NSN 5920-00-819-4266
NSN 7035-00-763-6180