Allen (Hex) Key, Short Arm.

Allen (Hex) Keys, Short Arm. Fixaball.co.uk sells all sizes of short arm, hexagon (Allen) key tools, at the best internet prices, with first class, free delivery. Orders placed before 2pm are usually dispatched...
£2.69

Allen (Hex) Keys, Short Arm.

Fixaball.co.uk sells all sizes of short arm, hexagon (Allen) key tools, at the best internet prices, with first class, free delivery.

Orders placed before 2pm are usually dispatched same day (Mon-Fri).

Please make your size and pack quantity selection from the drop down menus.

Allen (Hex) Keys

Allen Key (Also known as Hex Key, Hexagon Key, Socket Key, Allan Key), sizes and its dimensions can be very handy while designing and selecting fasteners for your application. These dimensions of allen keys can be used to check the accessibility of your bolts were space is limited. For example for an M8 socket head cap screw we need at least 32+8 (head size) = 40mm clearance above the screw for easy accessibility. Refer the following table for metric allen key sizes and dimensions for corresponding socket head cap screw based on ISO 4762/DIN 912 standards.

Allen (hex) Key Sizes

Fixaball.co.uk – Specialist Fixings and Fasteners

Socket Screw Size/ Diameter

Allen (Hex) Key Size

Length of Long Shank Length of Short Shank

M3

2.5

56

18

M4

3

63

20

M5

4

70

25

M6

5

80

28

M8

6

90

32

M10

8

100

36

M12

10

112

40

M14

12

125

45

M16

14

140

56

M18

14

140

56

M20

17

160

63

M22

17

160

63

M24

19

180

70

Some features of our Allen (Hex) keys are:

  • Manufactured from hardened and tempered chrome vanadium steel with chemically blacked finish and chamfered ends.
  • The tool is simple, small and light
  • The contact surfaces of the screw or bolt are protected from external damage
  • There are six contact surfaces between bolt and driver
  • The tool can be used with a headless screw
  • The screw can be inserted into its hole using the key
  • Torque is constrained by the length and thickness of the key
  • Very small bolt heads can be accommodated
  • Either end of the tool can be used to take advantage of reach or torque
  • The tool is L-shaped
  • The tool can be reconditioned using an electric grinder by removing the worn-out part, and then it works like new
  • The hexagon is typically a smaller diameter than would be used with an external cap, and is more likely to round off its contact surfaces.
  • It is much more difficult to turn a damaged (rounded or otherwise) internal fastener than an external one.

Image is for illustrative purposes only.

Please choose from the following for technical and/ or sales enquiries.

  • Fill out the website enquiry form
  • Click on the CHAT icon on the website
  • Call: 01242 522244
  • Email: sam@fixaball.co.uk