Ko-Ken KO100H3205 Hex Bit, 5 mm, 5/16 in Hex Shank

The Ko-Ken 100H-32 is a hex bit with a 5/16 in hex shank. (manufacturer-stated)

Hex sizes run from 3 to 14 mm.

Overall length is 32 mm. (manufacturer-stated)

Each model is listed in the table below with its specifications.

Where this product is used

• Driving hex socket screws with a bit holder or driver that takes a 5/16 in hex bit
• Machinery and equipment maintenance where hex socket fasteners are used
• Workshop and maintenance work

Features

• 5/16 in hex shank (manufacturer-stated)
• Hex bit
• Standards printed on the page: DIN 3126 C8 and ISO 1173 C8 (manufacturer-stated)

Common specifications

Key specifications

Weights are manufacturer-stated (Ko-ken catalogue 2025-26).

Selecting the right option

Choose the hex size to match the screw, and the length for the reach you need (32 mm). Use the bit in a holder or driver that takes a 5/16 in hex bit. The manufacturer prints DIN 3126 C8 and ISO 1173 C8 on the bit page. (manufacturer-stated) The 2025-26 catalogue page for this bit series carries no hand or impact heading, and the 2021 Ko-ken impact catalogue lists the same rows in its bits chapter. The catalogue's safety notes say to select impact sockets only for electric or air impact wrenches and to wear safety goggles when using nut runners or impact wrenches. (manufacturer-stated)

Related products

Related Ko-Ken products: Ko-Ken 121H Hex Bit, 2 to 6 mm, 70 and 100 mm Long, 1/4 in Hex Shank, Ko-Ken 107-16 Impact Inhex Bit, 10 to 22 mm, 40 and 100 mm Long, 16 mm Hex Input and Ko-Ken 183H-35 Impact Hex Bit, Metric Sizes, 7/16 in Hex Input.