Quill Micrometer Screw
This item is for the 4 HP head only, if you have a 2 HP or 1-1/2 HP this item will not work for you. The item you need is the 1033.
12-17-0263 | 12170263 | 4J-263 | 4J263
Overall Length: 7-1/8″ | Thread: 1/2-10 | Bottom Thread: 3/8-24