American Wrench Size Chart

American wrenches are also sometimes called end wrenches. So this can also be considered an end wrench size chart. Generally, you will have to consider socket sizes and wrench sizes if your hobby or business requires a need for these tools. The next, also the well-known fact is that wrench sizes are much easier and simpler to understand. There is no difference in ratchet size which simply makes this process even easier. The secret here is that you need to adapt the wrench size according to your business. For instance, if you are a car mechanic, you will generally need bigger wrenches. If you are a bicycle repairman you will need smaller ones.

Wrench sizes are commonly displayed in SAE which is a standard size or in Metric size. To make the chart as useful as possible, we will present you with both variations and therefore assist you in choosing the wrench you actually need. Keep in mind that the NOTE section of the table is used to explain the ‘’close enough’’ size between SAE and metrics.

Size/SAE in inchesSize in mm (metric)InchesNotes
5/32"0.1565/32 inches are close to 4mm
4mm0.157
4.5mm0.177
3/16"0.188
5mm0.197
5.5mm0.216
7/32"0.219
6mm0.236
1/4"0.25
6.5mm0.256
7mm0.276
9/32"0.281
5/16"0.3135/16 inches wrench is close to 8mm in size
8mm0.315
11/32"0.344
9mm0.354
3/8"0.375
10mm0.394
13/32"0.406
11mm0.4337/16 inches SAE size is simillar to 8mm, Metric size
7/16"0.438
15/32"0.46915/32 inches SAE size is simillar to 12mm, Metric size
12mm0.472
1/2"0.5
13mm0.512
17/32"0.531
14mm0.551
9/16"0.563
15mm0.59119/32 inches SAE size is simillar to 15 mm, Metric size
19/32"0.594
5/8"0.625
16mm0.63
21/32"0.656
17mm0.669
11/16"0.688
18mm0.709
23/32"0.719
19mm0.7483/4 inches SAE size is simillar to 19mm, Metric size
3/4"0.75
25/32"0.781
20mm0.787
13/16"0.813
21mm0.827
27/32"0.844
22mm0.866
7/8"0.875
23mm0.90629/32 inches in SAE size is simillar or close enouvgh to 23 mm (Metric size)
29/32"0.906
15/16"0.938
24mm0.945
25mm0.984
1"1
26mm1.024
1-1/16"1.0631-1/16 inches is simillar to 27 mm
27mm1.063
28mm1.102
1-1/8"1.125
29mm1.142
30mm1.181
31mm1.221
1-1/4"1.251-1/4 inches is close to 32 mm
32mm1.256
33mm1.299
1-5/16"1.313
34mm1.339
1-3/8"1.3751-3/8 inches and 35mm are close
35mm1.378
36mm1.417
1-7/16"1.438
37mm1.457
38mm1.496
1-1/2"1.5
39mm1.535
40mm1.575
41mm1.614
1-5/8"1.625
42mm1.654
1-11/16"1.6881-11/16 inches in SAE size is simillar to 43mm in Metric
43mm1.693
44mm1.733
1-3/4"1.75
45mm1.772
46mm1.811
1-13/16"1.813
47mm1.85
1-7/8"1.875
48mm1.89
49mm1.923
50mm1.969
2"22" and 52mm are almost identical
51mm2.008
52mm2.047
2-1/16"2.063
53mm2.087
2-1/8"2.1252-1/8 SAE inches and 54mm Metric are close enough
54mm2.126
55mm2.165
2-3/16"2.188
56mm2.205
57mm2.244
2-1/4"2.25
58mm2.283
59mm2.323
60mm2.362
2-3/8"2.375
61mm2.402
62mm2.441
63mm2.48
2-1/2"2.5

 

Bolt and wrench sizes

The next main thing to consider is the bolts you will do or undo using your wrenches. There are several differences in this case scenario so we will explain to them using a table. Here you can see the diameter of a bolt, SAE size of a wrench you need for that particular bolt and also Metric size wrench.

Diameter of a bolt (inches)SAE wrench size in inchesMetric wrench size in mm
1/85/168
3/163/810
1/47/1611
5/161/213
3/89/1615
7/165/816
1/23/419
9/1613/1621
5/815/1624
3/41-1/829
7/81-5/1634
11-1/238
1-1/81-11/1643
1-1/41-7/848
1-3/82-1/1653
1-1/22-1/458
1-5/82-7/1662
1-3/42-5/867
1-7/82-13/1672
2377
2-1/43-3/886
2-1/23-3/496
2-3/44-1/8105
34-1/2115
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