The 12B D3 extended pin connecting links are great for making quick repairs or building your own extended pin roller chain.
12B D3 Extended Pin Dimensions
Pin Diameter (d2):5.72mm
Pin Length From Centerline (L2):30.48mm
Extended Pin Length (L3):20.70mm
Connecting Link Clip Type:Spring Clip
Chain Material:Carbon/Alloy Steel
Industry Standard:ISO 606, DIN 8187, BS 228
Connecting Link Installation Tips
Spring Clip Connecting Links: The spring clip should be installed where the opening is facing away from the direction of travel. This will help prevent the spring clips from coming off. Like shown in the diagram to the right. Careful not spread the clip opening too far apart. This can make the clip more prone to falling off.
Cotter Pin Connecting Links: Cotter Pin Connecting Links The cotter pins pin legs should be spread about 60° apart. Like shown in the diagram to the left. Never reuse cotter pins that have been taken off. Never use commercial cotter pins as these are usually not hardened.