Allen Key Sizes For Bolts

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Allen key sizes for bolts.

Allen key also known as hex key hexagon key socket key ln key sizes and its dimensions can be very handy while designing and selecting fasteners for your application. Drive sizes for us allen drive screws. Allen head bolts. On the left hand side we have our sae to metric conversion guide for hex keys that provides the best substitute sae allen wrench for each given metric size.

Screw size decimal equiv. As you ll notice there isn t always a perfect substitute. Hex key screw head. A hex key allen wrench or allen key is a simple tool used to drive bolts and screws with hexagonal sockets in their heads.

Print this page. Allen keys are available in long short arm tee key type and also available. Metric allen key table from gt engineering oldham. In this video i demonstrate some of the techniques that we use regularly on site to remove rounded allen head bolts or hex key head bolts.

Imperial to metric for allen keys. Size diam ete r hex key size 6605 n. Before placing the hex key into the bolt make sure the head is clean of dirt and debris. The smaller size of allen wrench can easily strip a hex bolt or be stripped down itself.

The tool is usually formed of a single piece of hexagonal rod of hard steel with blunt ends that are meant to fit snugly into the screw s socket bent in an l shape with unequal arms the tool is usually held and twisted by the long arm creating a large torque at the. Also available from the nut place. A quick swipe with a q tip dipped in rubbing alcohol will pick up any dust that can collect in the corners of the hexagon. For instance metric size 9 mm doesn t have an imperial counterpart.

Counterbore countersink diam in 60 c clearance drills d diam in height in diam in a depth in b. Push fit tube fittings. Metric allen key table.