Stahlwille Long inch 1/2" bi-hex sockets, 9/16"

Stahlwille 51a is the long version of the 1/2" drive inch bi-hex socket, in 19 sizes from 3/8 to 1 1/2". Every size is 83mm long. 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.

Where this product is used

• Inch-series fasteners from 3/8 to 1 1/2" that sit below a surface or on a stud
• Reaching a nut that a standard 1/2" socket cannot clear
• Hand-operated work with 1/2" drive ratchets and extension bars

Features

• 1/2" internal square drive, inch sizes 3/8 to 1 1/2"
• 83mm long in every size
• Bi-hex (12-point) profile with AS-Drive anti-slip form
• HPQ steel, chrome-plated
• Hand operation only
• Made to ASME B 107.1 / Fed. Spec. GGG-W-641 / SAE AS 954-E

Key specifications

Choosing the right option

Choose the 51a when reach is the problem and the fastener is an inch size. The standard-length Stahlwille 50a 1/2" Drive Bi-Hex Sockets runs from 38 to 54mm. For metric sizes at the same 83mm length see the Stahlwille 51 1/2" Drive Long Bi-Hex Sockets.

Related Stahlwille products: Stahlwille 512-2K 1/2" Drive Reversible Ratchet, Stahlwille 512SG-QRN 1/2" Drive QuickRelease Fine-Tooth Ratchet, Stahlwille 517QR 1/2" Drive QuickRelease Flexible-Joint Ratchet, Stahlwille 509 1/2" Drive Extension Bars.