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HEX KEYS

A hex key, Allen key or Allen wrench is a tool used to drive bolts and screws with hexagonal sockets in their heads. Used with socket type fasteners where there is not sufficient space for wrenches or sockets. Request a quote today.

Hex Keys

A hex key, Allen key or Allen wrench is a tool used to drive bolts and screws with hexagonal sockets in their heads. Used with socket type fasteners where there is not sufficient space for wrenches or sockets.

F

C

S

L

R

K

Key Size Across Flats

Across Corners

Short Arm

Long Arm

Radius

Chamfer

Short Series

Long Series

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Min

Max

0.0280

0.0275

0.0314

0.0300

0.312

0.125

1.312

1.125

2.688

2.500

0.062

0.003

0.0350

0.0345

0.0393

0.0378

0.438

0.250

1.312

1.125

2.766

2.578

0.062

0.004

0.0500

0.0490

0.0560

0.0540

0.625

0.438

1.750

1.562

2.938

2.750

0.062

0.006

1/16

0.0615

0.0701

0.0680

0.656

03469

1.844

1.656

3.094

2.906

0.062

0.008

5/64

0.0771

0.0880

0.0859

0.703

0.516

1.969

1.781

3.281

3.094

0.078

0.008

3/32

0.0927

0.1058

0.1035

0.750

0.562

2.904

1.906

3.469

3.281

0.094

0.009

7/64

0.1079

0.1238

0.1210

0.797

0.609

2.219

2.031

3.656

6.469

0.109

0.014

1/8

0.1235

0.1418

0.1390

0.844

0.656

2.344

2.156

3.844

3.656

0.125

0.015

9/64

0.1391

0.1593

0.1566

0.891

0.703

2.469

2.281

4.031

3.844

0.141

0.016

5/32

0.1547

0.1774

0.1745

0.938

0.750

2.594

2.406

4.219

4.031

0.156

0.016

3/16

0.1860

0.2135

0.2105

1.031

0.844

2.844

2.656

4.594

4.406

0.188

0.022

7/32

0.2718

.2490

0.2460

1.125

0.938

3.094

2.906

4.969

4.781

0.219

0.024

1/4

0.2485

0.2845

0.2815

1.219

1.031

3.344

3.156

5.344

5.156

0.250

0.030

5/31

0.3110

0.3570

0.3531

1.344

1.156

3.844

3.656

6.094

5.906

0.312

0.032

3/8

0.3735

0.4285

0.4238

1.469

1.281

4.344

4.156

6.844

6.656

0.375

0.044

7/16

0.4355

0.5005

0.4944

1.594

1.406

4.844

4.655

7.594

7.406

0.438

0.047

1/2

0.4975

0.5715

0.5650

1.719

1.531

5.344

5.156

8.344

8.156

0.500

0.050

9/16

0.5600

0.6420

0.6356

1.844

1.656

5.844

5.656

9.094

8.906

0.562

0.053

5/8

0.6225

0.7146

0.7080

1.969

1.781

6.344

6.156

9.844

9.656

0.625

0.055

3/4

0.7470

0.8580

0.8512

2.219

2.031

7.344

7.156

11.344

11.156

0.750

0.070

7/8

0.8720

1.0020

0.9931

2.469

2.281

8.344

8.156

12.844

12.656

0.875

0.076

1

0.9970

1.1470

1.1350

2.719

2.531

9.344

9.156

14.344

14.156

1.000

0.081

1 1/4

1.2430

3.250

2.750

11.500

11.000

1.250

0.092

1 1/2

1.4930

3.750

3.250

13.500

13.000

1.500

0.104

1 3/4

1.743.

4.250

3.750

15.500

15.000

1.750

0.115

2

1.9930

4.750

4.250

17.500

17.000

2.000

0.126

2 1/4

2.2430

5.250

4.750

19.500

19.000

2.250

0.137

2 3/4

2.7420

6.250

5.750

23.500

23.000

2.750

0.159

3

2.9920

6.750

6.250

25.500

25.000

3.000

0.171

Per ANSI/ASME B18.3

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All the information provided in this section has been assembled with concern for accuracy. It is intended for advisory purposes only and use of this information is completely voluntary

Disclaimer

All the information provided in this section has been assembled with concern for accuracy. It is intended for advisory purposes only and use of this information is completely voluntary.