Ko-Ken KO16400M17 6-Point Impact Socket, 17 mm, 3/4 in Drive

The Ko-Ken 16400M is a 6-point impact socket with a 3/4 in square drive. (manufacturer-stated)

Sizes run from 17 to 70 mm.

Lengths are 50 to 70 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 3/4 in drive impact wrench
• Workshop, maintenance and assembly work on exposed fasteners
• General workshop and maintenance fastening

Features

• 3/4 in square drive (manufacturer-stated)
• 6-point (hexagon) opening (manufacturer-stated)
• Listed in the Impact Sockets section of the catalogue (manufacturer-stated)
• Retaining pin and O-ring or C-ring parts listed in the catalogue for each size (manufacturer-stated)

Common specifications

Key specifications

Lengths, weights and retaining part codes are manufacturer-stated (Ko-ken catalogue 2025-26).

Selecting the right option

Match the 3/4 in square drive to your impact wrench, then choose the size that fits the fastener. Dimensions are shown with the labels used in the catalogue table (D1, D2 and H). The catalogue footnotes list these retaining parts for the sockets: pin A61 with O-ring B61 or C-ring C61; pin A62 with O-ring B62. The part for each size is shown in its specifications. The catalogue lists the pins, O-rings and C-rings as separate packs (pages 270 and 271) and does not say whether any are supplied with the socket. (manufacturer-stated) The catalogue's safety notes say to select impact sockets only for electric or air impact wrenches, to wear safety goggles when using nut runners or impact wrenches, never to substitute a hand socket for an impact socket, and to replace sockets with cracked walls, battered points or other marks of wear. (manufacturer-stated)

Related products

Related Ko-Ken products: Ko-Ken 16405M 12-Point Impact Socket, Metric Sizes, 3/4 in Drive, Ko-Ken 16300M 6-Point Deep Impact Socket, Metric Sizes, 3/4 in Drive, Ko-Ken 16301M 6-Point Deep Thin Wall Impact Socket, Metric Sizes, 3/4 in Drive, Ko-Ken 16107-22 Impact Hex Bit Socket, Metric Sizes, 3/4 in Drive, Ko-Ken Impact Socket Spare Pin and Ko-Ken 1600C-10 C-Ring Retaining Clip Kit, 10 Clips, 3/4 in Drive.