Useful Tables, Data & Material Specifications

 

BA Standard Threads - Tapping & Clearance Drill Table

Metric Threads - Tapping & Clearance Drill Table

Piano Wire - SWG & AWG

Sheet Metal - SWG & Metric Equivalent

Measurement - mm to inches

___________________________________________________________

BA Standard Threads

B.A.
O.Dia
Tap Drill
Clearance
0
0.2362"
5.10mm
6.00mm
1
0.2087"
4.50mm
5.40mm
2
0.1850"
4.00mm
4.80mm
3
0.1614"
3.45mm
4.20mm
4
0.1417"
3.00mm
3.70mm
5
0.1260"
2.65mm
3.30mm
6
0.1102"
2.30mm
2.85mm
7
0.0984"
2.05mm
2.55mm
8
0.0866"
1.80mm
2.25mm
9
0.0784"
1.55mm
1.95mm
10
0.0669"
1.40mm
1.80mm
11
0.0591"
1.20mm
1.50mm
12
0.0511"
1.05mm
1.30mm

 

Metric Threads

O. Dia
Tap Drill
Clearance
1.6mm
1.25mm
1.65mm
1.8mm
1.45mm
1.85mm
2.0mm
1.60mm
2.05mm
2.2mm
1.75mm
2.25mm
2.5mm
2.05mm
2.60mm
3.0mm
2.50mm
3.10mm
3.5mm
2.90mm
3.60mm
4.0mm
3.30mm
4.10mm
4.5mm
3.80mm
4.60mm
5.0mm
4.20mm
5.10mm
6.0mm
5.00mm
6.10mm
7.0mm
6.00mm
7.20mm
8.0mm
6.80mm
8.20mm
10.0mm
8.50mm
10.20mm

 

Piano Wire

SWG
Wire Number
AWG
inches
mm
mm
inches
0.3000
7.6200
1
7.3481
0.2893
0.2760
7.0104
2
6.5437
0.2576
0.2520
6.4008
3
5.8273
0.2294
0.2320
5.8928
4
5.1892
0.2043
0.2120
5.3848
5
4.6203
0.1819
0.1920
4.8768
6
4.1148
0.1620
0.1760
4.4704
7
3.6652
0.1443
0.1600
4.0640
8
3.2639
0.1285
0.1440
3.6576
9
2.9058
0.1144
0.1280
3.2512
10
2.5883
0.1019
0.1160
2.9464
11
2.3038
0.0907
0.1040
2.6416
12
2.0523
0.0808
0.0920
2.3368
13
1.8288
0.0720
0.0800
2.0320
14
1.6281
0.0641
0.0720
1.8288
15
1.4503
0.0571
0.0640
1.6256
16
1.2903
0.0508
0.0560
1.4224
17
1.1506
0.0453
0.0480
1.2192
18
1.0236
0.0403
0.0400
1.0160
19
0.9119
0.0359
0.0360
0.9144
20
0.8128
0.0320
0.0320
0.8128
21
0.7239
0.0285
0.0280
0.7112
22
0.6426
0.0253
0.0240
0.6096
23
0.5740
0.0226
0.0220
0.5588
24
0.5105
0.0201
0.0200
0.5080
25
0.4547
0.0179
0.0180
0.4572
26
0.4039
0.0159
0.0164
0.4166
27
0.3607
0.0142
0.0148
0.3759
28
0.3200
0.0126
0.0136
0.3454
29
0.2870
0.0113
0.0124
0.3150
30
0.2540
0.0100

 

Sheet Metal

Metal Gauges
Imperial
Imperial Gauge
Metric Equivalent
inches
mm
mm
inches
0.1280
3.2512
10
3.00
0.1181
0.1040
2.6416
12
2.50
0.0984
0.0800
2.0320
14
2.00
0.0787
0.0640
1.6256
16
1.50
0.0591
0.0480
1.2192
18
1.20
0.0472
0.0360
0.9144
20
0.90
0.0354
0.0280
0.7112
22
0.70
0.0276
0.0220
0.5588
24
0.60
0.0236
0.0180
0.4572
26
0.50
0.0197

 

mm to inches

mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
                         
0.05 0.00197 9.00 0.35433 18.00 0.70866 27.00 1.06299   33.00 1.29921   42.00 1.65354   51.00 2.00787   57.00 2.24409
0.10 0.00394 9.10 0.35827 18.10 0.71260 27.10 1.06693   33.10 1.30315   42.10 1.65748   48.10 1.89370   57.10 2.24803
0.20 0.00787 9.20 0.36220 18.20 0.71654 27.20 1.07087   33.20 1.30709   42.20 1.66142   48.20 1.89764   57.20 2.25197
0.30 0.01181 9.30 0.36614 18.30 0.72047 27.30 1.07480   33.30 1.31102   42.30 1.66535   48.30 1.90157   57.30 2.25591
0.40 0.01575 9.40 0.37008 18.40 0.72441 27.40 1.07874   33.40 1.31496   42.40 1.66929   48.40 1.90551   57.40 2.25984
0.50 0.01969 9.50 0.37402 18.50 0.72835 27.50 1.08268   33.50 1.31890   42.50 1.67323   48.50 1.90945   57.50 2.26378
0.60 0.02362 9.60 0.37795 18.60 0.73228 27.60 1.08661   33.60 1.32283   42.60 1.67717   48.60 1.91339   57.60 2.26772
0.70 0.02756 9.70 0.38189 18.70 0.73622 27.70 1.09055   33.70 1.32677   42.70 1.68110   48.70 1.91732   57.70 2.27165
0.80 0.03150 9.80 0.38583 18.80 0.74016 27.80 1.09449   33.80 1.33071   42.80 1.68504   48.80 1.92126   57.80 2.27559
0.90 0.03543 9.90 0.38976 18.90 0.74409 27.90 1.09843   33.90 1.33465   42.90 1.68898   48.90 1.92520   57.90 2.27953
1.00 0.03937 10.00 0.39370 19.00 0.74803 28.00 1.10236   34.00 1.33858   43.00 1.69291   49.00 1.92913   58.00 2.28346
1.10 0.04331 10.10 0.39764 19.10 0.75197 28.10 1.10630   34.10 1.34252   43.10 1.69685   49.10 1.93307   58.10 2.28740
1.20 0.04724 10.20 0.40157 19.20 0.75591 28.20 1.11024   34.20 1.34646   43.20 1.70079   49.20 1.93701   58.20 2.29134
1.30 0.05118 10.30 0.40551 19.30 0.75984 28.30 1.11417   34.30 1.35039   43.30 1.70472   49.30 1.94094   58.30 2.29528
1.40 0.05512 10.40 0.40945 19.40 0.76378 28.40 1.11811   34.40 1.35433   43.40 1.70866   49.40 1.94488   58.40 2.29921
1.50 0.05906 10.50 0.41339 19.50 0.76772 28.50 1.12205   34.50 1.35827   43.50 1.71260   49.50 1.94882   58.50 2.30315
1.60 0.06299 10.60 0.41732 19.60 0.77165 28.60 1.12598   34.60 1.36220   43.60 1.71654   49.60 1.95276   58.60 2.30709
1.70 0.06693 10.70 0.42126 19.70 0.77559 28.70 1.12992   34.70 1.36614   43.70 1.72047   49.70 1.95669   58.70 2.31102
1.80 0.07087 10.80 0.42520 19.80 0.77953 28.80 1.13386   34.80 1.37008   43.80 1.72441   49.80 1.96063   58.80 2.31496
1.90 0.07480 10.90 0.42913 19.90 0.78346 28.90 1.13780   34.90 1.37402   43.90 1.72835   49.90 1.96457   58.90 2.31890
2.00 0.07874 11.00 0.43307 20.00 0.78740 29.00 1.14173   35.00 1.37795   44.00 1.73228   50.00 1.96850   59.00 2.32283
2.10 0.08268 11.10 0.43701 20.10 0.79134 29.10 1.14567   35.10 1.38189   44.10 1.73622   50.10 1.97244   59.10 2.32677
2.20 0.08661 11.20 0.44094 20.20 0.79528 29.20 1.14961   35.20 1.38583   44.20 1.74016   50.20 1.97638   59.20 2.33071
2.30 0.09055 11.30 0.44488 20.30 0.79921 29.30 1.15354   35.30 1.38976   44.30 1.74409   50.30 1.98031   59.30 2.33465
2.40 0.09449 11.40 0.44882 20.40 0.80315 29.40 1.15748   35.40 1.39370   44.40 1.74803   50.40 1.98425   59.40 2.33858
2.50 0.09843 11.50 0.45276 20.50 0.80709 29.50 1.16142   35.50 1.39764   44.50 1.75197   50.50 1.98819   59.50 2.34252
2.60 0.10236 11.60 0.45669 20.60 0.81102 29.60 1.16535   35.60 1.40157   44.60 1.75591   50.60 1.99213   59.60 2.34646
2.70 0.10630 11.70 0.46063 20.70 0.81496 29.70 1.16929   35.70 1.40551   44.70 1.75984   50.70 1.99606   59.70 2.35039
2.80 0.11024 11.80 0.46457 20.80 0.81890 29.80 1.17323   35.80 1.40945   44.80 1.76378   50.80 2.00000   59.80 2.35433
2.90 0.11417 11.90 0.46850 20.90 0.82283 29.90 1.17717   35.90 1.41339   44.90 1.76772   50.90 2.00394   59.90 2.35827
3.00 0.11811 12.00 0.47244 21.00 0.82677 27.00 1.06299   36.00 1.41732   45.00 1.77165   51.00 2.00787   60.00 2.36220
3.10 0.12205 12.10 0.47638 21.10 0.83071 27.10 1.06693   36.10 1.42126   45.10 1.77559   51.10 2.01181   60.10 2.36614
3.20 0.12598 12.20 0.48031 21.20 0.83465 27.20 1.07087   36.20 1.42520   45.20 1.77953   51.20 2.01575   60.20 2.37008
3.30 0.12992 12.30 0.48425 21.30 0.83858 27.30 1.07480   36.30 1.42913   45.30 1.78346   51.30 2.01969   60.30 2.37402
3.40 0.13386 12.40 0.48819 21.40 0.84252 27.40 1.07874   36.40 1.43307   45.40 1.78740   51.40 2.02362   60.40 2.37795
3.50 0.13780 12.50 0.49213 21.50 0.84646 27.50 1.08268   36.50 1.43701   45.50 1.79134   51.50 2.02756   60.50 2.38189
3.60 0.14173 12.60 0.49606 21.60 0.85039 27.60 1.08661   36.60 1.44094   45.60 1.79528   51.60 2.03150   60.60 2.38583
3.70 0.14567 12.70 0.50000 21.70 0.85433 27.70 1.09055   36.70 1.44488   45.70 1.79921   51.70 2.03543   60.70 2.38976
3.80 0.14961 12.80 0.50394 21.80 0.85827 27.80 1.09449   36.80 1.44882   45.80 1.80315   51.80 2.03937   60.80 2.39370
3.90 0.15354 12.90 0.50787 21.90 0.86220 27.90 1.09843   36.90 1.45276   45.90 1.80709   51.90 2.04331   60.90 2.39764
4.00 0.15748 13.00 0.51181 22.00 0.86614 28.00 1.10236   37.00 1.45669   46.00 1.81102   52.00 2.04724   61.00 2.40157
4.10 0.16142 13.10 0.51575 22.10 0.87008 28.10 1.10630   37.10 1.46063   46.10 1.81496   52.10 2.05118   61.10 2.40551
4.20 0.16535 13.20 0.51969 22.20 0.87402 28.20 1.11024   37.20 1.46457   46.20 1.81890   52.20 2.05512   61.20 2.40945
4.30 0.16929 13.30 0.52362 22.30 0.87795 28.30 1.11417   37.30 1.46850   46.30 1.82283   52.30 2.05906   61.30 2.41339
4.40 0.17323 13.40 0.52756 22.40 0.88189 28.40 1.11811   37.40 1.47244   46.40 1.82677   52.40 2.06299   61.40 2.41732
4.50 0.17717 13.50 0.53150 22.50 0.88583 28.50 1.12205   37.50 1.47638   46.50 1.83071   52.50 2.06693   61.50 2.42126
4.60 0.18110 13.60 0.53543 22.60 0.88976 28.60 1.12598   37.60 1.48031   46.60 1.83465   52.60 2.07087   61.60 2.42520
4.70 0.18504 13.70 0.53937 22.70 0.89370 28.70 1.12992   37.70 1.48425   46.70 1.83858   52.70 2.07480   61.70 2.42913
4.80 0.18898 13.80 0.54331 22.80 0.89764 28.80 1.13386   37.80 1.48819   46.80 1.84252   52.80 2.07874   61.80 2.43307
4.90 0.19291 13.90 0.54724 22.90 0.90157 28.90 1.13780   37.90 1.49213   46.90 1.84646   52.90 2.08268   61.90 2.43701
5.00 0.19685 14.00 0.55118 23.00 0.90551 29.00 1.14173   38.00 1.49606   47.00 1.85039   53.00 2.08661   62.00 2.44094
5.10 0.20079 14.10 0.55512 23.10 0.90945 29.10 1.14567   38.10 1.50000   47.10 1.85433   53.10 2.09055   62.10 2.44488
5.20 0.20472 14.20 0.55906 23.20 0.91339 29.20 1.14961   38.20 1.50394   47.20 1.85827