For Keyway MM Dimensions - see the table at the bottom of this page. Keyway MM Dimensions General Purpose 1018 Turned, Ground & Polished 1045 Steel Metric Stainless Steel Metric TGP Steel Stressproof Square Keystock Stainless Steel 303 TGP Hex Shafts 1215 Steel

Key dimensions: Parallel keys are most commonly used. The key and key seat cross section are ISO standardized. The key length should be less than about 1.5 

Not all size values shown in the tables below will be available in all tool lengths, materials, or handle options. Table 1 - Allen™ Wrench/Key Chart for Metric Sizes Common Metric Sizes of Allen™ Keys 1.3 mm 1.5 mm 2 mm 2.5 mm 3 mm 3.5 mm 4 mm 4.5 mm 5 mm 6 mm 7 mm 8 mm 9 mm 10 mm 11 mm 12 mm 14 mm 17 mm 19 mm 22 mm 70 mm 90 mm

Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings (Page 2 of 2) All Types 427-140 Reo a 21 (P eso) oola e el 11 pesees 2 Telepoe 22 a 22 eoo Key & Keyway

Unless otherwise specified, the shaft keyway is assumed to be standard. A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. The

We built a calculator to determine the standard keyway based on your shaft diameter, either in inches or millimeters.

Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings. All Types. (Page 1 of 2) Key & Keyway Dimensions – Millimeters.

SAE and metric hex key sets can live together in your tool kit. Last, having SAE & metric hex keys in the United States, you'll find larger metric half sizes of sockets like 3.5 mm aren't standard. However, a 9/64 Allen wrench in mm as an SAE hex wrench works in place of the 3.5 mm wrench. A 3/32 Allen wrench in mm, by comparison, would be 2mm.

Sunk keys · Square keys · A square key is used for shafts diameter up to and including 1” (25 mm) ; Sunk keys · Parallel sunk keys, Parallel sunk keys are widely 

In the United States, larger metric half sizes like 6.5 mm aren't standard in most hex key sets. However, the 1/4″ SAE hex wrench will likely work in place of a 6.5 mm wrench. In scenarios like these, use the chart to estimate the correct alternative. You can test different sizes till you find the best match.

Below are the sizes for a standard keyboard layout as a foundation for other layouts you may encounter. Cap Row Unit Length Stabilizer Esc R1 1u Tab R2 1.5u Caps Lock R3 1.75u Left Shift R4 2.25u Yes (2u) Left Control R4 1.25u Left GUI R4 1.25u Left Alt R4