Plastic Draft Gearboxes & Lids included with NO.5, 58, 20-Series (medium & long shank), Couplers. Also works with medium & long shank Whisker® Couplers. 10 pair per package
2-56 screws are the most commonly used for center hole.
0-48 or 0-80 screws are used for side holes.
Screw length will very depending on the mounting situation.
