1-1/2" Square Bore Shaft Collar Two-Piece Split Clamp Type, Stainless SteelSpecifications 15S108 UPC Code: 662786014000 Total Width (in.): 0. 625 Series: Signature Weight (lb.): 1. 20 Material: Stainless Steel Finish: None Bore Size (in.): 1 1 2 Screw Size: 5 16 24 x 1 Screw Type: SHCS Technical Resources 15S108 2D Technical Drawing Used on square shafts Can be placed anywhere on shaft Smooth bore protects shafts from damage Superior holding power over set screw type collars Exclusively stocked by Stafford, these collars fit