Poulan Machine Screw part# 015122 supersedes to part# 530-015122. This screw is listed as "No Longer Available" by the manufacturer. This is a 10-24 thread screw that is 1" long. It was used to mount the recoil housing on the following chainsaw models; S25AV, S25DA, and S25. There may be models that use this part that we do not have listed here. Please refer to your owners manual or a parts breakdown for your model, to assure that this is the correct part for your machine, before you order.