Stahlwille SW51a 1" Long Bi-Hex Socket, 1/2" Drive, 83 mm
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The 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 83 mm long (manufacturer-stated).
Stahlwille's datasheets call this series the long version, and its 2017 brochure lists it as extra deep. The bi-hex (double hexagon, 12-point) profile carries Stahlwille's AS-Drive (Anti-Slip Drive) form, which the maker says transmits high forces to the flats of nuts and bolts without damaging them. The sockets are HPQ steel, chrome-plated, and Stahlwille specifies hand operation only. The range is listed to ASME B 107.1 / Fed. Spec. GGG-W-641 / SAE AS 954-E (manufacturer-stated).
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" (manufacturer-stated)
- 83 mm long in every size (manufacturer-stated)
- Bi-hex (12-point) profile with AS-Drive anti-slip form (manufacturer-stated)
- HPQ steel, chrome-plated (manufacturer-stated)
- Hand operation only (manufacturer-stated)
- Listed to ASME B 107.1 / Fed. Spec. GGG-W-641 / SAE AS 954-E (manufacturer-stated)
Common specifications
| Specification | Detail |
|---|---|
| Square drive | 1/2" |
| Sizes | 3/8 to 1 1/2" |
| Length | 83 mm |
| Profile | Bi-hex (double hexagon, 12-point) with AS-Drive profile |
| Standard | ASME B 107.1 / Fed. Spec. GGG-W-641 / SAE AS 954-E (manufacturer-stated) |
| Material | HPQ steel, chrome-plated |
| Operation | Hand operation only |
| Sizes in this range | 19 |
Key specifications
| Size (across flats) | Order no. | Length | Weight |
|---|---|---|---|
| 3/8" | 03420024 | 83 mm | 93 g |
| 7/16" | 03420028 | 83 mm | 102 g |
| 1/2" | 03420032 | 83 mm | 122 g |
| 9/16" | 03420034 | 83 mm | 131 g |
| 5/8" | 03420036 | 83 mm | - |
| 11/16" | 03420038 | 83 mm | 158 g |
| 3/4" | 03420040 | 83 mm | 188 g |
| 13/16" | 03420042 | 83 mm | 170 g |
| 7/8" | 03420044 | 83 mm | 200 g |
| 15/16" | 03420046 | 83 mm | 281 g |
| 1" | 03420048 | 83 mm | 260 g |
| 1 1/16" | 03420050 | 83 mm | 359 g |
| 1 1/8" | 03420052 | 83 mm | 300 g |
| 1 3/16" | 03420054 | 83 mm | 377 g |
| 1 1/4" | 03420056 | 83 mm | - |
| 1 5/16" | 03420058 | 83 mm | - |
| 1 3/8" | 03420060 | 83 mm | 506 g |
| 1 7/16" | 03420062 | 83 mm | 635 g |
| 1 1/2" | 03420064 | 83 mm | 675 g |
A dash means no weight is published for that size on this page. Lengths and weights are manufacturer-stated.
Selecting 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 54 mm. For metric sizes at the same 83 mm length see the Stahlwille 51 1/2" Drive Long Bi-Hex Sockets.
Related products
Related Stahlwille 1/2" drive tools: 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, Stahlwille 514 Step-Up Adaptor, Stahlwille 513 Reducing Adaptor and Stahlwille 504-2K 1/2" Drive Swivel-Head Handles.
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1mm socket
Model Number: SW51 A 1 - 03420048
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1-1/2mm socket
Model Number: SW51 A 1 1/2 - 03420064
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1-1/4mm socket
Model Number: SW51 A 1 1/4 - 03420056
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1-1/8mm socket
Model Number: SW51 A 1 1/8 - 03420052
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1-1/16mm socket
Model Number: SW51 A 1 1/16 - 03420050
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1-3/8mm socket
Model Number: SW51 A 1 3/8 - 03420060
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1-3/16mm socket
Model Number: SW51 A 1 3/16 - 03420054
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1-5/16mm socket
Model Number: SW51 A 1 5/16 - 03420058
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1-7/16mm socket
Model Number: SW51 A 1 7/16 - 03420062
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1/2mm socket
Model Number: SW51 A 1/2 - 03420032
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3/4mm socket
Model Number: SW51 A 3/4 - 03420040
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3/8mm socket
Model Number: SW51 A 3/8 - 03420024
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5/8mm socket
Model Number: SW51 A 5/8 - 03420036
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7/8mm socket
Model Number: SW51 A 7/8 - 03420044
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7/16mm socket
Model Number: SW51 A 7/16 - 03420028
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9/16mm socket
Model Number: SW51 A 9/16 - 03420034
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11/16mm socket
Model Number: SW51 A 11/16 - 03420038
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13/16mm socket
Model Number: SW51 A 13/16 - 03420042
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15/16mm socket
Model Number: SW51 A 15/16 - 03420046
