Tri-Groove Sockets
![](/prerenderstable/mvPRE/contents/gfx/imagecache/739/7393a37p1-a07a-digital@halfx_636954336738338730.png?ver=imagenotfound)
Square Drive
![](/prerenderstable/mvPRE/contents/gfx/imagecache/tri/trigroovesocket-digital-master1559853707-p9@halfx_636954355988505514.png?ver=imagenotfound)
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 |