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Allen Hex Key Hexagon Keys Inch Series Tools

Allen Hexagon, Hex Key, Hexagon Keys Inch Series Tools

Inch Series Hexagon Keys


Inch Series Hexagon Keys - Applicable Specifications: ASME B18.3.
Hardness: RC 45-53.

Nominal
Key
Size

F
Hex Width
Across
Flats

C
Hex Width
Across
Corners

S
Length
Of Short
Arm

L
Length of
Long Arm
Short Series

L
Length of
Long Arm
Long Series

R
Radius
of
Bend
Min.

K
Chamfer
Max.

Max.
Min.
Max. .
Min
Max.
Min.
Max.
Min.
Max.
Min.

0.028

0.0280
0.0275

0.0314
0.0300

0.312

0.125

1.312

1.125

2.688

2.500

0.062

0.003

0.035

0.0350

0.0345

0.0393

0.0378

0.438
0.250

1.312

1.125

2.766

2.578

0.062

0.004

0.050

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

0.0625

0.0615

0.0701

0.0680

0.656

0.469

1.844

1.656

3.094

2.906

0.062

0.008

5/64

0.0781

0.0771

0.0880

0.0859

0.703

0.516

1.969

1.781

3.281

3.094

0.078

0.008

3/32

0.0937

0.0927

0.1058

0.1035

0.750

0.562

2.094

1.906

3.469

3.281

0.094

0.009

7/64

0.1094

0.1079

0.1238

0.1210

0.797

0.609

2.219

2.031

3.656

3.469

0.109

0.014

1/8

0.1250
0.1235

0.1418

0.1390

0.844

0.656

2.344

2.156

3.844

3.656

0.125

0.015

9/64

0.1406

0.1391

0.1593
0.1566

0.891

0.703

2.469

2.281

4.031

3.844

0.141

0.016

5/32

0.1562

0.1547

0.1774
0.1745

0.938

0.750

2.594

2.406

4.219

4.031

0.156

0.016

3/16

0.1875

0.1860

0.2135

0.2105

1.031

0.844

2.844

2.656

4.594

4.406

0.188

0.022

7/32

0.2187

0.2172

0.2490

0.2460

1.125

0.938

3.094

2.906

4.969

4.781

0.219

0.024

1/4

0.2500
0.2485

0.2845
0.2815

1.219

1.031

3.344

3.156

5.344

5.156

0.250

0.030

5/16

0.3125

0.3110

0.3570

0.3531

1.344

1.156

3.844

3.656

6.094

5.906

0.312

0.032

3/8

0.3750

0.3735

0.4300

0.4238

1.469

1.281

4.344

4.156

6.844

6.656

0.375

0.044

7/16

0.4375
0.4355

0.5018

0.4944

1.594

1.406

4.844

4.656

7.594

7.406

0.438

0.047

1/2

0.5000

0.4975

0.5735

0.5650

1.719

1.531

5.344

5.156

8.344

8.156

0.500

0.050

9/16

0.5625

0.5600

0.6452

0.6356

1.844
1.656

5.844

5.656

9.094

8.906

0.562

0.053

5/8

0.6250

0.6225

0.7169

0.7080

1.969

1.781

6.344

6.156

9.844

9.656

0.625

0.055

3/4

0.7500

0.7470

0.8603

0.8512

2.219

2.031

7.344

7.156

11.344

11.156

0.750

0.070

7/8

0.8750

0.8720

1.0036

0.9931

2.469

2.281

8.344

8.156

12.844

12.656

0.875

0.076

1

1.0000

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

1.2500

1.2430

---

---

3.250

2.750

11.500

11.000

---

---

1.250

0.092

1 1/2

1.5000

1.4930

---

---

3.750

3.250

13.500

13.000

---

---

1.500

0.104

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