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New applications should use BL series chain. AL series was removed from the A.N.S.I. B29.8 Leaf chain standard in 1975.
AL Series Leaf Chain
AL Series Chains-2
Unit of Measure
1 

Item #

P - Pitch

Lacing

Min. Tensile Strength

D

L

T

AL422 N/A 0.500 in N/A 2x2 N/A 3700 lb N/A 0.156 in N/A 0.331 in N/A 0.060 in
AL444 N/A 0.500 in N/A 4x4 N/A 7500 lb N/A 0.156 in N/A 0.585 in N/A 0.060 in
AL466 N/A 0.500 in N/A 6x6 N/A 11200 lb N/A 0.156 in N/A 0.839 in N/A 0.060 in
AL522 N/A 0.625 in N/A 2x2 N/A 6200 lb N/A 0.200 in N/A 0.427 in N/A 0.080 in
AL544 N/A 0.625 in N/A 4x4 N/A 12300 lb N/A 0.200 in N/A 0.762 in N/A 0.080 in
AL566 N/A 0.625 in N/A 6x6 N/A 18500 lb N/A 0.200 in N/A 1.094 in N/A 0.080 in
AL622 N/A 0.750 in N/A 2x2 N/A 8600 lb N/A 0.234 in N/A 0.498 in N/A 0.094 in
AL644 N/A 0.750 in N/A 4x4 N/A 17200 lb N/A 0.234 in N/A 0.888 in N/A 0.094 in
AL666 N/A 0.750 in N/A 6x6 N/A 25800 lb N/A 0.234 in N/A 1.278 in N/A 0.094 in
AL822 N/A 1.000 in N/A 2x2 N/A 14600 lb N/A 0.311 in N/A 0.644 in N/A 0.125 in
AL844 N/A 1.000 in N/A 4x4 N/A 29100 lb N/A 0.311 in N/A 1.173 in N/A 0.125 in
AL866 N/A 1.000 in N/A 6x6 N/A 43600 lb N/A 0.311 in N/A 1.701 in N/A 0.125 in
AL1022 N/A 1.250 in N/A 2x2 N/A 22000 lb N/A 0.373 in N/A 0.789 in N/A 0.156 in
AL1044 N/A 1.250 in N/A 4x4 N/A 44000 lb N/A 0.373 in N/A 1.445 in N/A 0.156 in
AL1066 N/A 1.250 in N/A 6x6 N/A 66000 lb N/A 0.373 in N/A 2.098 in N/A 0.156 in
AL1222 N/A 1.500 in N/A 2x2 N/A 31700 lb N/A 0.437 in N/A 0.953 in N/A 0.187 in
AL1244 N/A 1.500 in N/A 4x4 N/A 63400 lb N/A 0.437 in N/A 1.732 in N/A 0.187 in
AL1266 N/A 1.500 in N/A 6x6 N/A 95000 lb N/A 0.437 in N/A 2.514 in N/A 0.187 in
AL1444 N/A 1.750 in N/A 4x4 N/A 83600 lb N/A 0.500 in N/A 2.020 in N/A 0.219 in
AL1466 N/A 1.750 in N/A 6x6 N/A 125400 lb N/A 0.500 in N/A 2.935 in N/A 0.219 in
AL1644 N/A 2.000 in N/A 4x4 N/A 105800 lb N/A 0.562 in N/A 2.285 in N/A 0.250 in
AL1666 N/A 2.000 in N/A 6x6 N/A 158000 lb N/A 0.562 in N/A 3.325 in N/A 0.250 in
Unit of Measure
1