Climax Metals CRC-100X10 Steel Set Screw Collar with 5/16"-24"x 1/4" Set Screw, Corrosion Resistant, Yellow Zinc Plating, 1" Bore Size, 1-1/2" OD (Pack of 10) Effective on hard and soft shafts Cost effective collar design Easily installed where major disassembly would otherwise be required Tolerance: +.0005/+.0030 T316 stainless steel is highly effective in corrosive environments