Hex Keys · DIN 911
Allen Keys
Hardened hex keys in metric and inch sizes, matched to every socket head, countersunk and button head screw we stock.
Also calledAllen keyAllen wrenchHex keyL keyAllen key set
Overview
About our allen keys range
Allen keys from TVS/Sundaram Fasteners and Unbrako in chrome vanadium and alloy steel, heat treated for torque without rounding off. Available individually, in sets, and in long-arm and ball-end versions.
Common sizes we supply: 2.5, 3, 4, 5, 6, 8, 10, 12, 14, 17 and 19 mm allen keys, and inch keys from 1/16" to 3/4".
Also known in the trade as: Allen key, Allen wrench, Hex key, L key, Allen key set, Ball end allen key.
Makes / Suppliers
Available makes
TVS/Sundaram Fasteners
Unbrako
Local Make
Specifications
Technical specifications
- Material
- Chrome vanadium steel · Alloy steel
- Standard
- Metric DIN 911 · Inch ANSI B18.3
- Size Range
- Metric 1.5 mm – 19 mm · Inch 1/16" – 3/4"
- Manufacturing
- Cold forged, heat treated
- Types
- Short arm · Long arm · Ball end · Sets
Coatings & Finishes
Finishes available
Black Oxide / Self Colour
Standard heat-treated finish with light oil. Default for high-tensile grades 8.8–12.9.
Nickel / Chrome Plated
Bright decorative finish for visible assemblies.
Sizes
Which Allen key fits which screw
| Key Size (mm) | Socket Head Cap Screw | Countersunk Screw | Button Head Screw |
|---|---|---|---|
| 2 | — | M3 | M3 |
| 2.5 | M3 | M4 | M4 |
| 3 | M4 | M5 | M5 |
| 4 | M5 | M6 | M6 |
| 5 | M6 | M8 | M8 |
| 6 | M8 | M10 | M10 |
| 8 | M10 | M12 | M12 |
| 10 | M12 | M16 | M16 |
| 12 | M14 | M20 | — |
| 14 | M16 | — | — |
| 17 | M20 | — | — |
| 19 | M24 | — | — |
Related
Socket Head Cap Screws
Countersunk Screws
Button Head Screws