A-OL140H-AI 140H Offset Link, USAOne New Aftermarket Replacement #140H Heavy Roller Chain Offset Link This #140H heavy series offset link (also known as a half link) is used for repairing, adjusting the length of, or adding links to ANSI #140H heavy single strand roller chain. The offset link adds half a pitch to the chain assembly, making it essential when a chain strand requires an odd number of pitches. This link is manufactured in the USA to ANSI B29. 1 dimensional standards and