Stahlwille Inch 1/4" bi-hex sockets, 1/2"

Stahlwille 40aD is a 1/4" drive bi-hex socket range in inch sizes from 5/32 to 9/16". Ten of the 11 sizes are 23mm long and the 9/16" is 24mm. The bi-hex (double hexagon, 12-point) profile carries Stahlwille's AS-Drive (Anti-Slip Drive) form, which transmits high forces to the flats of nuts and bolts without damaging them. The sockets are HPQ steel, chrome-plated, for hand operation only. The range is made to ASME B 107.1 / Fed. Spec. GGG-W-641 / SAE AS 954-E (test values).

Where this product is used

• Inch-series fasteners from 5/32 to 9/16" turned with a 1/4" drive ratchet or handle
• Work on equipment built to inch sizes, where a short socket is needed
• Kits that pair a metric 40D set with inch sizes

Features

• 1/4" internal square drive, inch sizes 5/32 to 9/16"
• Bi-hex (12-point) profile with AS-Drive anti-slip form
• 23mm long, 24mm for the 9/16"
• HPQ steel, chrome-plated
• Hand operation only
• Made to ASME B 107.1 / Fed. Spec. GGG-W-641 / SAE AS 954-E (test values)

Key specifications

Choosing the right option

The 40aD is the short inch-size 1/4" socket. If the fastener sits deeper than a 23mm socket will reach, use the 50mm long Stahlwille 40aDL 1/4" Drive Long Bi-Hex Sockets. For metric fasteners see the Stahlwille 40D 1/4" Drive Bi-Hex Sockets. For larger inch sizes move up to the 3/8" drive Stahlwille 45a 3/8" Drive Bi-Hex Sockets.

Related Stahlwille products: Stahlwille 415QR N 1/4" Drive QuickRelease Fine-Tooth Ratchet, Stahlwille 416QR 1/4" Drive QuickRelease Flexible-Joint Ratchet, Stahlwille 405 1/4" Drive Extension Bars, Stahlwille 410 Step-Up Adaptor.