Page 673 Penn Tool Co. Precision Tooling Buyer's Guide 2019
P. 673
671
Drill #
Letter Inch
mm
0.497
12.6238
0.498
12.6492
0.499
12.6746
1

2
0.5000
12.7000
0.501
12.7254
0.502
12.7508
0.503
12.7762
0.504
12.8016
0.505
12.8270
0.506
12.8524
0.507
12.8778
0.508
12.9032
0.509
12.9286
0.510
12.9540
0.511
12.9794
0.5118
13.0000
0.512
13.0048
0.513
13.0302
0.514
13.0556
0.515
13.0810
33 ⁄
64
0.5156
13.0962
0.516
13.1064
0.517
13.1318
0.518
13.1572
0.519
13.1826
0.520
13.2080
0.521
13.2334
0.522
13.2588
0.523
13.2842
0.524
13.3096
0.525
13.3350
0.526
13.3604
0.527
13.3858
0.528
13.4112
0.529
13.4366
0.530
13.4620
0.531
13.4874
17 ⁄
32
0.5312
13.4925
0.532
13.5128
0.533
13.5382
0.534
13.5636
0.535
13.5890
0.536
13.6144
0.537
13.6398
0.538
13.6652
0.539
13.6906
0.540
13.7160
0.541
13.7414
0.542
13.7668
0.543
13.7922
0.544
13.8176
0.545
13.8430
0.546
13.8684
35 ⁄
64
0.5469
13.8913
0.547
13.8938
0.548
13.9192
0.549
13.9446
0.550
13.9700
0.551
13.9954
0.5512
14.0000
0.552
14.0208
0.553
14.0462
0.554
14.0716
0.555
14.0970
0.556
14.1224
0.557
14.1478
0.558
14.1732
0.559
14.1986
0.560
14.2240
0.561
14.2494
0.562
14.2748
9

16
0.5625
14.2875
0.563
14.3002
0.564
14.3256
0.565
14.3510
0.566
14.3764
0.567
14.4018
0.568
14.4272
0.569
14.4526
Drill #
Letter Inch
mm
0.570
14.4780
0.571
14.5034
0.572
14.5288
0.573
14.5542
0.574
14.5796
0.575
14.6050
0.576
14.6304
0.577
14.6558
0.578
14.6812
37 ⁄
64
0.5781
14.6837
0.579
14.7066
0.580
14.7320
0.581
14.7574
0.582
14.7828
0.583
14.8082
0.584
14.8336
0.585
14.8590
0.586
14.8844
0.587
14.9098
0.588
14.9352
0.589
14.9606
0.590
14.9860
0.5906
15.0000
0.591
15.0114
0.592
15.0368
0.593
15.0622
19 ⁄
32
0.5937
15.0800
0.594
15.0876
0.595
15.1130
0.596
15.1384
0.597
15.1638
0.598
15.1892
0.599
15.2146
0.600
15.2400
0.601
15.2654
0.602
15.2908
0.603
15.3162
0.604
15.3416
0.605
15.3670
0.606
15.3924
0.607
15.4178
0.608
15.4432
0.609
15.4686
39 ⁄
64
0.6094
15.4788
0.610
15.4940
0.611
15.5194
0.612
15.5448
0.613
15.5702
0.614
15.5956
0.615
15.6210
0.616
15.6464
0.617
15.6718
0.618
15.6972
0.619
15.7226
0.620
15.7480
0.621
15.7734
0.622
15.7988
0.623
15.8242
0.624
15.8496
5

8
0.6250
15.8750
0.626
15.9004
0.627
15.9258
0.628
15.9512
0.629
15.9766
0.6299
16.0000
0.630
16.0020
0.631
16.0274
0.632
16.0528
0.633
16.0782
0.634
16.1036
0.635
16.1290
0.636
16.1544
0.637
16.1798
0.638
16.2052
0.639
16.2306
0.640
16.2560
41 ⁄
64
0.6406
16.2712
0.641
16.2814
0.642
16.3068
Drill #
Letter Inch
mm
0.643
16.3322
0.644
16.3576
0.645
16.3830
0.646
16.4084
0.647
16.4338
0.648
16.4592
0.649
16.4846
0.650
16.5100
0.651
16.5354
0.652
16.5608
0.653
16.5862
0.654
16.6116
0.655
16.6370
0.656
16.6624
21 ⁄
32
0.6562
16.6675
0.657
16.6878
0.658
16.7132
0.659
16.7386
0.660
16.7640
0.661
16.7894
0.662
16.8148
0.663
16.8402
0.664
16.8656
0.665
16.8910
0.666
16.9164
0.667
16.9418
0.668
16.9672
0.669
16.9926
0.6693
17.0000
0.670
17.0180
0.671
17.0434
43 ⁄
64
0.6719
17.0663
0.672
17.0688
0.673
17.0942
0.674
17.1196
0.675
17.1450
0.676
17.1704
0.677
17.1958
0.678
17.2212
0.679
17.2466
0.680
17.2720
0.681
17.2974
0.682
17.3228
0.683
17.3482
0.684
17.3736
0.685
17.3990
0.686
17.4244
0.687
17.4498
11

16
0.6875
17.4625
0.688
17.4752
0.689
17.5006
0.690
17.5260
0.691
17.5514
0.692
17.5768
0.693
17.6022
0.694
17.6276
0.695
17.6530
0.696
17.6784
0.697
17.7038
0.698
17.7292
0.699
17.7546
0.700
17.7800
0.701
17.8054
0.702
17.8308
0.703
17.8562
45 ⁄
64
0.703
17.8587
0.704
17.8816
0.705
17.9070
0.706
17.9324
0.707
17.9578
0.708
17.9832
0.7087
18.0000
0.709
18.0086
0.710
18.0340
0.711
18.0594
0.712
18.0848
0.713
18.1102
0.714
18.1356
0.715
18.1610
Drill #
Letter Inch
mm
0.716
18.1864
0.717
18.2118
0.718
18.2372
23 ⁄
32
0.7187
18.2550
0.719
18.2626
0.720
18.2880
0.721
18.3134
0.722
18.3388
0.723
18.3642
0.724
18.3896
0.725
18.4150
0.726
18.4404
0.727
18.4658
0.728
18.4912
0.729
18.5166
0.730
18.5420
0.731
18.5674
0.732
18.5928
0.733
18.6182
0.734
18.6436
47 ⁄
64
0.7344
18.6538
0.735
18.6690
0.736
18.6944
0.737
18.7198
0.738
18.7452
0.739
18.7706
0.740
18.7960
0.741
18.8214
0.742
18.8468
0.743
18.8722
0.744
18.8976
0.745
18.9230
0.746
18.9484
0.747
18.9738
0.7480
19.0000
0.749
19.0246
3

4
0.7500
19.0500
0.751
19.0754
0.752
19.1008
0.753
19.1262
0.754
19.1516
0.755
19.1770
0.756
19.2024
0.757
19.2278
0.758
19.2532
0.759
19.2786
0.760
19.3040
0.761
19.3294
0.762
19.3548
0.763
19.3802
0.764
19.4056
0.765
19.4310
49 ⁄
64
0.7656
19.4462
0.766
19.4564
0.767
19.4818
0.768
19.5072
0.769
19.5326
0.770
19.5580
0.771
19.5834
0.772
19.6088
0.773
19.6342
0.774
19.6596
0.775
19.6850
0.776
19.7104
0.777
19.7358
0.778
19.7612
0.779
19.7866
0.780
19.8120
0.781
19.8374
25 ⁄
32
0.7812
19.8425
0.782
19.8628
0.783
19.8882
0.784
19.9136
0.785
19.9390
0.786
19.9644
0.787
19.9898
0.7874
20.0000
0.788
20.0152
0.789
20.0406
Drill #
Letter Inch
mm
0.790
20.0660
0.791
20.0914
0.792
20.1168
0.793
20.1422
0.794
20.1676
0.795
20.1930
0.796
20.2184
51 ⁄
64
0.7969
20.2413
0.797
20.2438
0.798
20.2692
0.799
20.2946
0.800
20.3200
0.801
20.3454
0.802
20.3708
0.803
20.3962
0.804
20.4216
0.805
20.4470
0.806
20.4724
0.807
20.4978
0.808
20.5232
0.809
20.5486
0.810
20.5740
0.811
20.5994
0.812
20.6248
13 ⁄
16
0.8125
20.6375
0.813
20.6502
0.814
20.6756
0.815
20.7010
0.816
20.7264
0.817
20.7518
0.818
20.7772
0.819
20.8026
0.820
20.8280
0.821
20.8534
0.822
20.8788
0.823
20.9042
0.824
20.9296
0.825
20.9550
0.826
20.9804
0.8268
21.0000
0.827
21.0058
0.828
21.0312
53 ⁄
64
0.8281
21.0337
0.829
21.0566
0.830
21.0820
0.831
21.1074
0.832
21.1328
0.833
21.1582
0.834
21.1836
0.835
21.2090
0.836
21.2344
0.837
21.2598
0.838
21.2852
0.839
21.3106
0.840
21.3360
0.841
21.3614
0.842
21.3868
0.843
21.4122
27 ⁄
32
0.8437
21.4300
0.844
21.4376
0.845
21.4630
0.846
21.4884
0.847
21.5138
0.848
21.5392
0.849
21.5646
0.850
21.5900
0.851
21.6154
0.852
21.6408
0.853
21.6662
0.854
21.6916
0.855
21.7170
0.856
21.7424
0.857
21.7678
0.858
21.7932
0.859
21.8186
55 ⁄
64
0.8594
21.8288
0.860
21.8440
0.861
21.8694
0.862
21.8948
Drill #
Letter Inch
mm
0.863
21.9202
0.864
21.9456
0.865
21.9710
0.866
21.9964
0.8661
22.0000
0.867
22.0218
0.868
22.0472
0.869
22.0726
0.870
22.0980
0.871
22.1234
0.872
22.1488
0.873
22.1742
0.874
22.1996
7

8
0.8750
22.2250
0.876
22.2504
0.877
22.2758
0.878
22.3012
0.879
22.3266
0.880
22.3520
0.881
22.3774
0.882
22.4028
0.883
22.4282
0.884
22.4536
0.885
22.4790
0.886
22.5044
0.887
22.5298
0.888
22.5552
0.889
22.5806
0.890
22.6060
57 ⁄
64
0.8906
22.6212
0.891
22.6314
0.892
22.6568
0.893
22.6822
0.894
22.7076
0.895
22.7330
0.896
22.7584
0.897
22.7838
0.898
22.8092
0.899
22.8346
0.900
22.8600
0.901
22.8854
0.902
22.9108
0.903
22.9362
0.904
22.9616
0.905
22.9870
0.9055
23.0000
0.906
23.0124
29 ⁄
32
0.9062
23.0175
0.907
23.0378
0.908
23.0632
0.909
23.0886
0.910
23.1140
0.911
23.1394
0.912
23.1648
0.913
23.1902
0.914
23.2156
0.915
23.2410
0.916
23.2664
0.917
23.2918
0.918
23.3172
0.919
23.3426
0.920
23.3680
0.921
23.3934
59 ⁄
64
0.9219
23.4163
0.922
23.4188
0.923
23.4442
0.924
23.4696
0.925
23.4950
0.926
23.5204
0.927
23.5458
0.928
23.5712
0.929
23.5966
0.930
23.6220
0.931
23.6474
0.932
23.6728
0.933
23.6982
0.934
23.7236
0.935
23.7490
0.936
23.7744
Drill #
Letter Inch
mm
0.937
23.7998
15 ⁄
16
0.9375
23.8125
0.938
23.8252
0.939
23.8506
0.940
23.8760
0.941
23.9014
0.942
23.9268
0.943
23.9522
0.944
23.9776
0.9449
24.0000
0.945
24.0030
0.946
24.0284
0.947
24.0538
0.948
24.0792
0.949
24.1046
0.950
24.1300
0.951
24.1554
0.952
24.1808
0.953
24.2062
61 ⁄
64
0.9531
24.2087
0.954
24.2316
0.955
24.2570
0.956
24.2824
0.957
24.3078
0.958
24.3332
0.959
24.3586
0.960
24.3840
0.961
24.4094
0.962
24.4348
0.963
24.4602
0.964
24.4856
0.965
24.5110
0.966
24.5364
0.967
24.5618
0.968
24.5872
31 ⁄
32
0.9687
24.6050
0.969
24.6126
0.970
24.6380
0.971
24.6634
0.972
24.6888
0.973
24.7142
0.974
24.7396
0.975
24.7650
0.976
24.7904
0.977
24.8158
0.978
24.8412
0.979
24.8666
0.980
24.8920
0.981
24.9174
0.982
24.9428
0.983
24.9682
0.984
24.9936
0.9843
25.0000
63 ⁄
64
0.984
25.0038
0.985
25.0190
0.986
25.0444
0.987
25.0698
0.988
25.0952
0.989
25.1206
0.990
25.1460
0.991
25.1714
0.992
25.1968
0.993
25.2222
0.994
25.2476
0.995
25.2730
0.996
25.2984
0.997
25.3238
0.998
25.3492
0.999
25.3746
1
1.0000
25.4000
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