Ko-Ken KO3400A16 6-Point Socket, 1/2 in, 3/8 in Drive
Available
The Ko-Ken 3400A is a 6-point socket with a 3/8 in square drive. (manufacturer-stated)
Sizes run from 1/4 to 7/8 in.
Lengths are 26 to 32 mm. (manufacturer-stated)
Each model is listed in the table below with its specifications.
Where this product is used
- Turning inch nuts and bolts with a 3/8 in drive ratchet or handle
- Workshop, maintenance and assembly work on exposed fasteners
- General workshop and maintenance fastening
Features
- 3/8 in square drive (manufacturer-stated)
- 6-point (hexagon) opening (manufacturer-stated)
Common specifications
| Specification | Detail |
|---|---|
| Drive | 3/8 in (manufacturer-stated) |
| Opening | 6-point (manufacturer-stated) |
Key specifications
| Model | Size | Length | Weight |
|---|---|---|---|
| KO3400A08 | 1/4 in | 26 mm (manufacturer-stated) | 20 g (manufacturer-stated) |
| KO3400A10 | 5/16 in | 26 mm (manufacturer-stated) | 22 g (manufacturer-stated) |
| KO3400A11 | 11/32 in | 26 mm (manufacturer-stated) | 23 g (manufacturer-stated) |
| KO3400A12 | 3/8 in | 26 mm (manufacturer-stated) | 23 g (manufacturer-stated) |
| KO3400A14 | 7/16 in | 26 mm (manufacturer-stated) | 25 g (manufacturer-stated) |
| KO3400A16 | 1/2 in | 26 mm (manufacturer-stated) | 24 g (manufacturer-stated) |
| KO3400A18 | 9/16 in | 27 mm (manufacturer-stated) | 31 g (manufacturer-stated) |
| KO3400A19 | 19/32 in | 28 mm (manufacturer-stated) | 39 g (manufacturer-stated) |
| KO3400A20 | 5/8 in | 28 mm (manufacturer-stated) | 42 g (manufacturer-stated) |
| KO3400A22 | 11/16 in | 30 mm (manufacturer-stated) | 51 g (manufacturer-stated) |
| KO3400A24 | 3/4 in | 30 mm (manufacturer-stated) | 63 g (manufacturer-stated) |
| KO3400A25 | 25/32 in | 31 mm (manufacturer-stated) | 75 g (manufacturer-stated) |
| KO3400A26 | 13/16 in | 32 mm (manufacturer-stated) | 77 g (manufacturer-stated) |
| KO3400A28 | 7/8 in | 32 mm (manufacturer-stated) | 82 g (manufacturer-stated) |
Lengths and weights are manufacturer-stated (Ko-ken catalogue 2025-26).
Selecting the right option
Match the 3/8 in square drive to your ratchet or handle, then choose the size that fits the fastener. The catalogue prints one dimension table for the 6-point and 12-point series (3400A and 3405A), so the lengths and weights shown here are the figures printed for both. (manufacturer-stated) The catalogue's safety notes say to select impact sockets only for electric or air impact wrenches and not to substitute hand sockets for impact sockets; this series is listed in the hand sockets section of the catalogue. (manufacturer-stated)
Related products
Related Ko-Ken products: Ko-Ken 3300A 6-Point Deep Socket, Inch Sizes, 3/8 in Drive, Ko-Ken 3305A 12-Point Deep Socket, Inch Sizes, 3/8 in Drive, Ko-Ken 3400M 6-Point Socket, Metric Sizes, 3/8 in Drive, Ko-Ken 3400M-24 6-Point Socket, Metric Sizes, 3/8 in Drive and Ko-Ken 3000-60 Phillips Bit Socket, 3/8 in Drive.
Resources
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1/2mm socket
Model Number: KO3400A16
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1/4mm socket
Model Number: KO3400A08
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3/4mm socket
Model Number: KO3400A24
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3/8mm socket
Model Number: KO3400A12
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5/8mm socket
Model Number: KO3400A20
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5/16mm socket
Model Number: KO3400A10
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7/8mm socket
Model Number: KO3400A28
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7/16mm socket
Model Number: KO3400A14
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9/16mm socket
Model Number: KO3400A18
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11/16mm socket
Model Number: KO3400A22
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11/32mm socket
Model Number: KO3400A11
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13/16mm socket
Model Number: KO3400A26
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19/32mm socket
Model Number: KO3400A19
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25/32mm socket
Model Number: KO3400A25
