Replacement Drive Screw for Posi-Clamps. Standard length. Fits all No-Mar Posi-Clamps with 1/2"-13 LEFT HAND drive thread (2014 and newer) that is formed into the steel body.
We recommend verifying that the threads in your Posi-Clamp body aren't stripped or worn out before purchasing replacement drive screws.
Your Posi-Clamps must have FORMED threads like those in this photo for this style drive screw to work:
Older Posi-Clamps manufactured before 2014 use an ACME drive screw which is no longer available (and have a welded nut or bushing on the steel body) and you will need to order a replacement individual or set of Posi-Clamps.