Plastic fire department connection adjustable plug fits any thread on an FDC. Used to keep dirt, dust, and debris out of fire department connections while maintaining a tight fit regardless of thread type. The actual width of these are 3 5/8".
Easily removed with a spanner wrench. Re-usable!
Very easy installation! It features two adjustable metal plates installed in the back of the plug easily mated with your local thread. Once adjusted to size, the metal plates are locked in place by a central metal bolt.
Sold as a single unit.