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Chart for Determining Open Areas (All figures are presented in percentages of open area)
Example:
If you desire 1/2mm opening with C 3/32 wire, the chart will show you that this would be 18.2% open area. To determine this percentage, read down the Conn-Weld column at left to 1/2mm. (or .020 inches) then read straight across to the "C" profile section under "A" dimension for 3/32.
 Openings   Microns                Openings   Round
Hole 		  Square
Hole 		  Ref.
Tyler
Mesh 		  Inches
 Conn-Weld  "A" Dim.   "A" Dim.   "A" Dim.      "A" Dim.  Conn-Weld
MM Inches .030 .045 .030 1/16 3/32 1/16 3/32 1/8 3/32 .110 1/8 5/32 3/16 1/4 MM Inches
  .001 25 3.2 2.2 3.2 1.6 1.1 1.6 1.1 0.8 1.1 0.9 0.8 0.6 0.5 0.4   .001     400 .0015
  .002 50 6.3 4.3 6.3 3.2 2.2 3.2 2.2 1.6 2.2 1.8 1.6 1.3 1.1 0.8   .002     250 .0024
  .003 75 9.1 6.3 9.1 4.8 3.2 4.8 3.2 2.4 3.2 2.7 2.4 1.9 1.6 1.2   .003     200 .0029
  .004 100 11.8 8.2 11.8 6.2 4.3 6.2 4.3 3.2 4.3 3.5 3.2 2.5 2.1 1.6   .004     150 .0041
1/8 .005 125 14.3 10.0 14.3 7.7 5.3 7.7 5.3 4.0 5.3 4.3 4.0 3.1 2.6 2.0 1/8 .005     100 .0058
  .006 150 16.7 11.8 16.7 9.1 6.3 9.1 6.3 4.8 6.3 5.2 4.7 3.7 3.1 2.3   .006     80 .0069
  .007 177 18.9 13.5 18.9 10.4 7.2 10.4 7.2 5.5 7.2 6.0 5.5 4.3 3.6 2.7   .007     65 .0082
1/5 .008 200 21.1 15.1 21.1 11.8 8.2 11.8 8.2 6.2 8.2 6.8 6.2 4.9 4.1 3.1 1/5 .008     60 .0097
1/4 .010 250 25.0 18.2 25.0 14.3 10.0 14.3 10.0 7.7 10.0 8.3 7.6 6.0 5.1 3.8 1/4 .010     48 .0116
1/3 .013 330 30.2 22.4 30.2 17.8 12.6 17.8 12.6 9.8 12.6 10.6 9.7 7.7 6.6 4.9 1/3 .013     42 .0138
2/5 .016 400 34.8 26.2 34.8 21.1 15.1 21.1 15.1 11.8 15.1 12.7 11.7 9.3 8.0 6.0 2/5 .016     35 .0164
  .018 450 37.5 28.6 37.5 23.1 16.7 23.1 16.7 13.0 16.7 14.1 12.9 10.3 8.9 6.7   .018     32 .0195
1/2 .020 500 40.0 30.8 40.0 25.0 18.2 25.0 18.2 14.3 18.2 15.4 14.2 11.4 9.8 7.4 1/2 .020 1/32   28 .0232
3/5 .024 620 44.4 34.8 44.4 28.6 21.1 28.6 21.1 16.7 21.1 17.9 16.6 13.3 11.5 8.8 3/5 .024     24 .0276
3/4 .030 750 50.0 40.0 50.0 33.3 25.0 33.3 25.0 20.0 25.0 21.4 19.9 16.1 14.0 10.7 3/4 .030 3/64   20 .0328
1 .040 1000 57.1 47.1 57.1 40.0 30.8 40.0 30.8 25.0 30.8 26.7 24.8 20.4 17.8 13.8 1 .040     16 .0390
1-1/4 .050 1250 62.5 52.6 62.5 45.5 35.7 45.5 35.7 29.4 35.7 31.3 29.2 24.3 21.3 16.7 1-1/4 .050 1/16   14 .0460
1-3/8 .055 1410 64.7 55.0 64.7 47.8 37.9 47.8 37.9 31.4 37.9 33.3 31.2 26.1 22.9 18.0 1-3/8 .055     12 .0555
1-1/2 .060 1500 66.7 57.1 66.7 50.0 40.0 50.0 40.0 33.3 40.0 35.3 33.1 27.8 24.5 19.4 1-1/2 .060 5/64   10 .0650
1-5/8 .065   68.4 59.1 68.4 52.0 41.9 52.0 41.9 35.1 41.9 37.1 34.9 29.4 26.0 20.6 1-5/8 .065 3/32   9 .0780
1-3/4 .070   70.0 60.9 70.0 53.8 43.8 53.8 43.8 36.8 43.8 38.9 36.6 31.0 27.5 21.9 1-3/4 .070 7/64   8 .0930
2 .080   72.7 64.0 72.7 57.1 47.1 57.1 47.1 40.0 47.1 42.1 39.8 33.9 30.2 24.2 2 .080 1/8   7 .1100
2-1/4 .090   75.0 66.7 75.0 60.0 50.0 60.0 50.0 42.9 50.0 45.0 42.7 36.6 32.7 26.5 2-1/4 .090 9/64 3/32    
2-1/2 .100   76.9 69.0 76.9 62.5 52.6 62.5 52.6 45.5 52.6 47.6 45.2 39.1 35.1 28.6 2-1/2 .100 5/32   6 .1310
2-3/4 .110   78.6 71.0 78.6 64.7 55.0 64.7 55.0 47.8 55.0 50.0 47.6 41.4 37.3 30.6 2-3/4 .110 11/64      
3 .120   80.0 72.7 80.0 66.7 57.1 66.7 57.1 50.0 57.1 52.2 49.8 43.5 39.3 32.4 3 .120 3/16 5/32 5 .1560
  9/64   82.4 76.0 82.4 70.1 61.0 70.1 61.0 54.0 61.0 56.1 53.8 47.5 43.3 36.1   9/64 7/32   4 .1850
  3/16   86.2 81.0 86.2 75.8 67.6 75.8 67.6 61.0 67.6 63.0 60.8 54.6 50.3 42.9   3/16 1/4 3/16    
  7/32   88.0 83.0 88.0 78.5 70.9 78.5 70.9 64.6 70.9 66.5 64.4 58.4 54.2 46.7   7/32 5/16 1/4 3 .2630
  1/4   89.3 84.7 89.3 80.6 73.5 80.6 73.5 67.6 73.5 69.4 67.4 61.6 57.5 50.0   1/4 3/8 5/16 2-1/2 .3120
  5/16   91.2 87.4 91.2 83.9 77.6 83.9 77.6 72.3 77.6 74.0 72.1 66.7 62.8 55.6   5/16 7/16      
  3/8   92.6 89.3 92.6 86.2 80.6 86.2 80.6 75.8 80.6 77.3 75.6 70.6 67.0 60.0   3/8 1/2 3/8    
  7/16   93.6 90.7 93.6 87.9 82.9 87.9 82.9 78.5 82.9 79.9 78.3 73.7 70.3 63.6   7/16 9/16      
  1/2   94.3 91.7 94.3 89.3 84.7 89.3 84.7 80.6 84.7 82.0 80.5 76.2 73.0 66.7   1/2 5/8 1/2    
  9/16   94.9 92.6 94.9 90.4 86.2 90.4 86.2 82.4 86.2 83.6 82.3 78.3 75.3 69.2   9/16 11/16      
  5/8   95.4 93.3 95.4 91.2 87.4 91.2 87.4 83.9 87.4 85.0 83.8 80.0 77.2 71.4   5/8 3/4 5/8    
  11/16   95.8 93.8 95.8 92.0 88.4 92.0 88.4 85.1 88.4 86.2 85.0 81.5 78.8 73.3   11/16 13/16      
  3/4   96.2 94.3 96.2 92.6 89.3 92.6 89.3 86.2 89.3 87.2 86.1 82.8 80.2 75.0   3/4 7/8 3/4    
  7/8   96.7 95.1 96.7 93.6 90.7 93.6 90.7 87.9 90.7 88.8 87.9 84.9 82.5 77.8   7/8 1 7/8    
  1   97.1 95.7 97.1 94.3 91.7 94.3 91.7 89.3 91.7 90.1 89.2 86.5 84.4 80.0   1 1-1/4 1    
  1-1/4   97.7 96.5 97.7 95.4 93.3 95.4 93.3 91.2 93.3 91.9 91.2 88.9 87.1 83.3   1-1/4 1-1/2 1-1/4    
  1-1/2   98.0 97.1 98.0 96.2 94.3 96.2 94.3 92.6 94.3 93.2 92.5 90.6 89.0 85.7   1-1/2 1-3/4 1-1/2    
  1-3/4   98.3 97.5 98.3 96.7 95.1 96.7 95.1 93.6 95.1 94.1 93.5 91.8 90.4 87.5   1-3/4 2 1-3/4    
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Conn-Weld Industries, Inc.
U.S. Route 460 & State Route 31
Princeton, WV 24740
Ph: 304-487-1421 :: Fax: 304-487-3761
Email: sales@conn-weld.com
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