Ko-Ken KO3400M06 6-Point Socket, 6 mm, 3/8 in Drive
Available
The Ko-Ken 3400M is a 6-point socket with a 3/8 in square drive. (manufacturer-stated)
Sizes run from 6 to 26 mm.
Lengths are 26 to 35 mm. (manufacturer-stated)
Each model is listed in the table below with its specifications.
Where this product is used
- Turning metric 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 |
|---|---|---|---|
| KO3400M06 | 6 mm | 26 mm (manufacturer-stated) | 20 g (manufacturer-stated) |
| KO3400M07 | 7 mm | 26 mm (manufacturer-stated) | 20 g (manufacturer-stated) |
| KO3400M08 | 8 mm | 26 mm (manufacturer-stated) | 22 g (manufacturer-stated) |
| KO3400M09 | 9 mm | 26 mm (manufacturer-stated) | 23 g (manufacturer-stated) |
| KO3400M10 | 10 mm | 26 mm (manufacturer-stated) | 24 g (manufacturer-stated) |
| KO3400M11 | 11 mm | 26 mm (manufacturer-stated) | 25 g (manufacturer-stated) |
| KO3400M12 | 12 mm | 26 mm (manufacturer-stated) | 25 g (manufacturer-stated) |
| KO3400M13 | 13 mm | 26 mm (manufacturer-stated) | 24 g (manufacturer-stated) |
| KO3400M14 | 14 mm | 27 mm (manufacturer-stated) | 31 g (manufacturer-stated) |
| KO3400M15 | 15 mm | 28 mm (manufacturer-stated) | 39 g (manufacturer-stated) |
| KO3400M16 | 16 mm | 28 mm (manufacturer-stated) | 42 g (manufacturer-stated) |
| KO3400M17 | 17 mm | 29 mm (manufacturer-stated) | 51 g (manufacturer-stated) |
| KO3400M18 | 18 mm | 30 mm (manufacturer-stated) | 51 g (manufacturer-stated) |
| KO3400M19 | 19 mm | 30 mm (manufacturer-stated) | 63 g (manufacturer-stated) |
| KO3400M20 | 20 mm | 31 mm (manufacturer-stated) | 75 g (manufacturer-stated) |
| KO3400M21 | 21 mm | 32 mm (manufacturer-stated) | 77 g (manufacturer-stated) |
| KO3400M22 | 22 mm | 32 mm (manufacturer-stated) | 82 g (manufacturer-stated) |
| KO3400M23 | 23 mm | 33 mm (manufacturer-stated) | 95 g (manufacturer-stated) |
| KO3400M24 | 24 mm | 34 mm (manufacturer-stated) | 102 g (manufacturer-stated) |
| KO3400M25 | 25 mm | 34 mm (manufacturer-stated) | 115 g (manufacturer-stated) |
| KO3400M26 | 26 mm | 35 mm (manufacturer-stated) | 129 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 (3400M and 3405M), 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 3405M 12-Point Socket, Metric Sizes, 3/8 in Drive, Ko-Ken 3400M-24 6-Point Socket, Metric Sizes, 3/8 in Drive, Ko-Ken 3300M 6-Point Deep Socket, Metric Sizes, 3/8 in Drive, Ko-Ken 3300M L120 6-Point Extra Deep Socket, Metric Sizes, 3/8 in Drive and Ko-Ken 3000-60 Phillips Bit Socket, 3/8 in Drive.
Resources
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6mm socket
Model Number: KO3400M06
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7mm socket
Model Number: KO3400M07
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8mm socket
Model Number: KO3400M08
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9mm socket
Model Number: KO3400M09
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10mm socket
Model Number: KO3400M10
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11mm socket
Model Number: KO3400M11
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12mm socket
Model Number: KO3400M12
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13mm socket
Model Number: KO3400M13
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14mm socket
Model Number: KO3400M14
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15mm socket
Model Number: KO3400M15
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16mm socket
Model Number: KO3400M16
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17mm socket
Model Number: KO3400M17
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18mm socket
Model Number: KO3400M18
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19mm socket
Model Number: KO3400M19
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20mm socket
Model Number: KO3400M20
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21mm socket
Model Number: KO3400M21
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22mm socket
Model Number: KO3400M22
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23mm socket
Model Number: KO3400M23
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24mm socket
Model Number: KO3400M24
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25mm socket
Model Number: KO3400M25
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26mm socket
Model Number: KO3400M26
