3M
4.2mm
4.5M
4.5mm
5M
6mm
8M
7.5mm
10M
8.5mm
The zippers are designated, based on width of chain, breaking strength and the duty it performs. For general guidelines the following table is given.
Type of Application
Nos.
Normally referred Chain
(width in mm.)
Light duty
# 3
4 to 4.5
Light Special duty
# 4
4.5 to 5
Medium duty
# 5
5.5 to 6.5
Medium heavy duty
# 6 / # 7
6.5 to 7.0
Heavy duty
# 8 / # 10
7.5 to 9.0
For clarity, it is always better to specify chain width, while placing the order. For your reference, we have given the chain width along with product designation codes below the image of each product.