81X Connecting / Master Link for 81X Roller Chain - 2.609" Pitch - 4 PackOur 81X connecting links are also commonly referred to as 81X master links. This connecting link is manufactured to ANSI same standards and specifications and is extremely durable and high quality.Used in heavy-duty operations and conveying applications in severe environments. Compatible with Forest Industry Requirements. Pitch: 2.609" Fits Chain Number: 81X Chain Standard: ANSI Link Type: Connecting Link Material: Carbon Steel Chain Construction: Cottered Link Plate Height: 1.126 in Link Plate Thickness: 0.159 in Pin Diameter: 0.437 in Corrosion Resistant: Not Resistant to Corrosion Chain Construction: Cottered Plate Height: 1.126 in Plate Thickness: 0.159 in