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Tri-Groove Sockets
Square Drive
Grip the indentations around the outside of tri-groove fasteners. These sockets are for hand-driven use only.
| Drive Size | Overall Lg. | OD | For Fastener Type | For Screw Size (Head Dia.) | For Nut Size (Dia.) | Material | Each | |
3/8" Square Drive | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 20 | 1" | 47/64" | Screws and Nuts | 5/16" Standard (0.585") | 1/4", No. 10 (0.661") | Black-Oxide Steel | 0000000 | 000000 |