As you ll notice there isn t always a perfect substitute.
Allen key sizes for bolts.
For instance metric size 9 mm doesn t have an imperial counterpart.
Metric allen key table from gt engineering oldham.
Size diam ete r hex key size 6605 n.
Screw size decimal equiv.
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.
Drive sizes for us allen drive screws.
A hex key allen wrench or allen key is a simple tool used to drive bolts and screws with hexagonal sockets in their heads.
Allen keys are available in long short arm tee key type and also available.
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.
These dimensions of allen keys can be used to check the accessibility of your bolts were space is limited.
Screw diameter drive size.
Allen head bolts.
Imperial to metric for allen keys.
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.
Push fit tube fittings.
Before placing the hex key into the bolt make sure the head is clean of dirt and debris.
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Also available from the nut place.
Metric allen key table.
G j hall specialist tools.
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.
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Counterbore countersink diam in 60 c clearance drills d diam in height in diam in a depth in b.