Common Hex Key Sizes

Hex keys with t shaped handles can provide increased turning power and more comfortable grips.

Common hex key sizes.

In the united states larger metric half sizes like 6 5 mm aren t standard in most hex key sets. Common sizes of allen wrenches although allen wrenches come in a wide range of sizes there are a few sizes in particular that tend to be more commonly used than others. Hexagonal ones are great for easy grip but the folding ones give you more sizes. Substituting uncommon hex sizes.

Fixing bolts number and sizes vary. Damage to the fastener or the tool can result from using a hex wrench that is too small for the socket for example a 5 mm tool used in a 5 5 mm socket. Hex key equivalent sizes. Use ball end hex keys at an angle off axis to the screw.

Stan dard sae hex key sizes inches metric hex key sizes mm notes compares standard and metric allen wrench sizes where they closely match and where they don t wrench equivalence 15 key set. In standard measurements the most common allen wrench sizes for the tasks listed above that is automotive repair bike work and furniture assembly are the 5 32 inch 3 16. Lastly there s one other added benefit to having both sae metric hex keys. Interchangable 0 028 and 0 7mm.

Of these sizes some of the more popular ones are 2 5 mm 3 mm 4 mm 5 mm 6 mm 8 mm 10 mm. Common metric hex key sizes. If you only own a set of short allen keys consider getting at least the 8 and 10mm sizes in a longer length. Remember to be wary of the leverage when tightening a bolt.

However the 1 4 sae hex wrench will likely work in place of a 6 5 mm wrench. Hex keys are measured across flats af which is the distance between two opposite parallel flat sides of the key. In addition to the precision sizes mentioned above the common metric allen wrench sizes are 1 5 mm 2 mm 2 5 mm 3 mm 4 mm 4 5 mm 5 mm 5 5 mm 6 mm 7 mm 8 mm 9 mm 10 mm. Hex key kit with stand klein tools.

5mm hex or t25 torx wrench. Everything from adjusting your brakes to tightening your seat post will require an allen key. Hex key standard sizes. Also called hex keys allen keys are an essential for bike maintenance.

They re designed to provide 360 rotation at angles up to 35. A hex wrench or allen wrench features a hexagonal shape and can be used with automotive plumbing and electrical applications.