Hex-Head Gripper Screws
Make quick height adjustments by turning the threaded stud. Screw these grippers into place from above and clamp against them. The serrations penetrate the workpiece surface to hold uneven or irregularly shaped parts.
Extra-fine serrations are closer together than fine serrations for less penetration and a lighter hold on the workpiece. Fine serrations penetrate the workpiece for aggressive holding.
Fine threads are closely spaced for more precise adjustments than coarse threads. They also resist loosening from vibration better than coarse threads.
Thread | Head | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Spacing | Dia. | Ht. | Ht. | Wd. | Material | Each | |
Extra-Fine Serrations | |||||||||
| 1/4"-20 | 1/2" | Coarse | 5/16" | 45/64" | 13/64" | 7/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 1/4"-20 | 1" | Coarse | 5/16" | 1 13/64" | 13/64" | 7/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 5/16"-18 | 1/2" | Coarse | 3/8" | 3/4" | 1/4" | 1/2" | Carbide-Tipped Steel | 0000000 | 0000 |
| 5/16"-18 | 1" | Coarse | 3/8" | 1 1/4" | 1/4" | 1/2" | Carbide-Tipped Steel | 0000000 | 00000 |
| 3/8"-16 | 1/2" | Coarse | 1/2" | 25/32" | 9/32" | 9/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 3/8"-16 | 1" | Coarse | 1/2" | 1 9/32" | 9/32" | 9/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 1/2"-13 | 1" | Coarse | 5/8" | 1 23/64" | 23/64" | 3/4" | Carbide-Tipped Steel | 0000000 | 00000 |
| 1/2"-20 | 1" | Fine | 5/8" | 1 23/64" | 23/64" | 3/4" | Carbide-Tipped Steel | 00000000 | 00000 |
Fine Serrations | |||||||||
| 5/16"-18 | 1/2" | Coarse | 3/8" | 3/4" | 1/4" | 1/2" | Carbide-Tipped Steel | 0000000 | 0000 |
| 5/16"-18 | 1" | Coarse | 3/8" | 1 1/4" | 1/4" | 1/2" | Carbide-Tipped Steel | 0000000 | 00000 |
| 5/16"-24 | 1/2" | Fine | 3/8" | 3/4" | 1/4" | 1/2" | Carbide-Tipped Steel | 00000000 | 0000 |
| 5/16"-24 | 1" | Fine | 3/8" | 1 1/4" | 1/4" | 1/2" | Carbide-Tipped Steel | 00000000 | 00000 |
| 3/8"-16 | 1/2" | Coarse | 1/2" | 25/32" | 9/32" | 9/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 3/8"-16 | 1" | Coarse | 1/2" | 1 9/32" | 9/32" | 9/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 3/8"-16 | 1 1/2" | Coarse | 1/2" | 1 25/32" | 9/32" | 9/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 3/8"-24 | 1" | Fine | 1/2" | 1 9/32" | 9/32" | 9/16" | Carbide-Tipped Steel | 00000000 | 00000 |
| 1/2"-13 | 1" | Coarse | 5/8" | 1 23/64" | 23/64" | 3/4" | Carbide-Tipped Steel | 0000000 | 00000 |
| 1/2"-13 | 1 1/2" | Coarse | 5/8" | 1 55/64" | 23/64" | 3/4" | Carbide-Tipped Steel | 0000000 | 00000 |
| 1/2"-20 | 1" | Fine | 5/8" | 1 23/64" | 23/64" | 3/4" | Carbide-Tipped Steel | 00000000 | 00000 |
| 5/8"-11 | 1" | Coarse | 3/4" | 1 7/16" | 7/16" | 15/16" | Carbide-Tipped Steel | 0000000 | 00000 |
| 5/8"-11 | 2" | Coarse | 3/4" | 2 7/16" | 7/16" | 15/16" | Carbide-Tipped Steel | 0000000 | 00000 |
Set-Screw Grippers
Screw in from the top to adjust the height or mount from the bottom with a hex key to set the gripping surface flush with the work surface. Clamp against these grippers to maintain a secure hold on uneven or irregularly shaped parts.
Drive | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Dia. | Ht. | Size | Style | Material | Each | |
Threaded Stud | |||||||
Extra-Fine Serrations | |||||||
| 3/8"-16 | 1/4" | 1/2" | 3/16" | Hex | Carbide-Tipped Steel | 0000000 | 000000 |
| 3/8"-16 | 1/4" | 1" | 3/16" | Hex | Carbide-Tipped Steel | 0000000 | 00000 |
| 3/8"-16 | 1/4" | 2" | 3/16" | Hex | Carbide-Tipped Steel | 0000000 | 00000 |
Fine Serrations | |||||||
| 1/2"-13 | 3/8" | 1" | 1/4" | Hex | Carbide-Tipped Steel | 0000000 | 00000 |
| 1/2"-13 | 3/8" | 2" | 1/4" | Hex | Carbide-Tipped Steel | 0000000 | 00000 |
| 3/4"-10 | 1/2" | 2" | 3/8" | Hex | Carbide-Tipped Steel | 0000000 | 00000 |
Solid-Surface Grippers
Clamp uneven or odd-shaped workpieces onto these grippers to hold them securely in place. Rather than a through hole, these grippers have a solid surface that grips your workpiece evenly and shields the mounting hole from debris. However, they can be harder to line up than grippers with a through hole. They mount from the bottom with a socket head cap screw.
Grippers with a set screw notch can be mounted from the side with a set screw.
Fine serrations penetrate the workpiece for aggressive holding. Extra-fine serrations are closer together than fine serrations for less penetration and a lighter hold on the workpiece.
| Dia. | Ht. | Mounting Hole Thread Size | Mounting Fasteners Included | Notch Ht. | Material | Gripping Surface Texture | Choose a Serration Type | Each | |
| 3/8" | 3/8" | 10-32 | No | 3/16" | Carbide-Tipped Steel | Serrated | Extra Fine | 00000000 | 000000 |
| 1/2" | 3/8" | 10-32 | No | 3/16" | Carbide-Tipped Steel | Serrated | 00000000 | 00000 | |
| 1/2" | 1/2" | 10-32 | No | 3/16" | Carbide-Tipped Steel | Serrated | 00000000 | 00000 | |
| 5/8" | 3/8" | 1/4"-28 | No | 3/16" | Carbide-Tipped Steel | Serrated | 00000000 | 00000 | |
| 3/4" | 3/8" | 1/4"-28 | No | 3/16" | Carbide-Tipped Steel | Serrated | 00000000 | 00000 | |
| 1" | 3/8" | 1/4"-28 | No | 3/16" | Carbide-Tipped Steel | Serrated | 00000000 | 00000 |