Chain dimensions form

We ask for the outer width and outer length of the chain link because it is easier for you to measure. You can submit either measurements or photos through the below form. If submitting photos if digital calipers please ensure the screen is visible.

Chain Size Grade 30 BBB

Width Length
Chain size Diameter
wd
Outer
ow
Inner
iw
Outer
ol
Pitch
il
mm in mm in mm in mm in mm in
1/4in 7.1 0.281 25.1 0.990 10.9 0.430 36.3 1.430 22.1 0.870
5/16in 8.7 0.343 30.2 1.190 12.7 0.500 43.0 1.691 25.4 1.000
3/8in 10.3 0.406 36.3 1.430 15.7 0.620 48.3 1.901 27.7 1.090
1/2in 13.5 0.531 46.0 1.810 19.1 0.750 61.0 2.401 34.0 1.340

Source: http://coxeng.co.uk/anchoring/chain/