Wire No. Size |
Diameter in mm |
Diameter in inches |
Max Book Thickness |
Approx. number of 80gsm sheets |
Pitch |
Number of Loops |
4 |
6.9mm |
1/4” |
4.8mm |
45 |
3:1 |
24 |
5 |
8mm |
5/16” |
6.4mm |
60 |
3:1 |
24 |
6 |
9.5mm |
3/8” |
7.9mm |
75 |
3:1 |
24 |
7 |
11mm |
7/16” |
9.5mm |
85 |
3:1 |
24 |
8 |
12.7mm |
1/2” |
11.1mm |
100 |
3:1 |
24 |
9 |
14.3mm |
9/16” |
12.7mm |
120 |
3:1 |
24 |
10 |
16mm |
5/8” |
14.3mm |
135 |
2:1 |
16 |
12 |
19mm |
3/4" |
17.5mm |
155 |
2:1 |
16 |
14 |
22mm |
7/8” |
20.6mm |
180 |
2:1 |
16 |
16 |
25.4mm |
1” |
23.8mm |
210 |
2:1 |
16 |
20 |
32mm |
1 ¼” |
28mm |
255 |
2:1 |
16 |
24 |
38mm |
1 ½” |
32.2mm |
280 |
2:1 |
16 |