Metric Allen Wrenches

Metric Allen Wrenches

metric Hex Allen Keys

Used with Socket Driven Fasteners

Made from black alloy steel, Metric Allen wrenches are six-sided L-shaped tools used to tighten or loosen screws and bolts with a hexagonal socket in the head. Offered in both short and long arm, to maximize reach and torque for any application. Short and long arm metric Allen wrenches are named according to the length of their arms.

Socket Cap Screws, button cap screws, and socket set screws are examples of Allen wrench driven products. They are frequently found in mechanical equipment, bicycles, engines, and assemble-it-yourself or IKEA furniture.

The term Allen is from a manufacturing company that makes these wrenches. The generic term for an Allen wrench is a hex key.

Metric Allen Wrenches are also known by several other Trade Names such as Allen Keys, Hex Allen Keys, Hex Allen Wrenches, and Hex Keys.

Our product specifications provide the lengths for each arm for your convenience.

Short Arm Metric Hex Key Specifications

Hex Allen Key Sizes Width Across Flats Length of Long Arm Length of Short Arm
0.9M Max 0.899 - Min 0.876 Max 34M - Min 28M Max 11M - Min 6M
1.3M Max 1.270 - Min 1.244 Max 44M - Min 39M Max 16M - Min 11M
1.5M Max 1.50 - Min 1.47 Max 45M - Min 43M Max 14M - Min 13M
2M Max 2.00 - Min 1.97 Max 50M - Min 48M Max 16M - Min 15M
2.5M Max 2.50 - Min 2.47 Max 56M - Min 53M Max 18M - Min 17M
3M Max 3.00 - Min 2.96 Max 63M - Min 60M Max 20M - Min 18M
4M Max 4.00 - Min 3.96 Max 70M - Min 66M Max 25M - Min 23M
5M Max 5.00 - Min 4.96 Max 80M - Min 76M Max 28M - Min 26M
6M Max 6.00 - Min 5.95 Max 90M - Min 86M Max 32M - Min 30M
8M Max 8.00 - Min 7.95 Max 100M - Min 95M Max 36M - Min 34M
10M Max 10.00 - Min 9.95 Max 112M - Min 106M Max 40M - Min 38M
12M Max 12.00 - Min 11.95 Max 125M - Min 119M Max 45M - Min 43M
14M Max 14.00 - Min 13.95 Max 140M - Min 133M Max 56M - Min 53M
17M Max 17.00 - Min 16.93 Max 160M - Min 152M Max 63M - Min 60M
19M Max 19.00 - Min 18.93 Max 280M - Min 271M Max 70M - Min 67M

Long Arm Metric Hex Key Specifications

Hex Allen Key Sizes Width Across Flats Length of Long Arm Length of Short Arm
1.5M Max 1.50 - Min 1.47 Max 78M - Min 76M Max 14M - Min 13M
2M Max 2.00 - Min 1.97 Max 83M - Min 81M Max 16M - Min 15M
2.5M Max 2.50 - Min 2.47 Max 90M - Min 87M Max 18M - Min 17M
3M Max 3.00 - Min 2.96 Max 100M - Min 97M Max 20M - Min 18M
4M Max 4.00 - Min 3.96 Max 106M - Min 102M Max 25M - Min 23M
5M Max 5.00 - Min 4.96 Max 118M - Min 114M Max 28M - Min 26M
6M Max 6.00 - Min 5.95 Max 140M - Min 136M Max 32M - Min 30M
7M Max 7.00 - Min 6.97 Max 145M - Min 140M Max 36M - Min 34M
8M Max 8.00 - Min 7.95 Max 160M - Min 155M Max 36M - Min 34M
10M Max 10.00 - Min 9.95 Max 170M - Min 164M Max 40M - Min 38M

FAQs

What are Allen Keys used for?

Allen keys, or Allen wrenches, are simple tools used to drive screws and bolts with hexagonal drives or sockets. Socket Cap Products, such as socket set screws and socket cap screws, are predominately driven with Allen keys.

Are hex keys the same as Allen keys or Allen wrenches?

Yes. A hex key is a generic term for this type of tool while "Allen key" and "Allen wrench" refer to the Allen brand that popularized it.

What are the common Metric Allen Wrench sizes?

The common metric Allen wrench sizes range from 1.5 mm (displayed as 1.5M) to 10 mm (displayed as 10M). Of the sizes in this range, the most popular ones are 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, & 10 mm.