J Perkins 4.0mm Model Boat Insert Coupling 5511862

The J Perkins 4.0mm Insert Coupling, part number 5511862, is a solid brass marine coupling for model boat drive systems. This precision-machined insert has a ribbed, splined shaft section designed to press securely into flexible universal joint couplings or rubber drives.

Suggested for model boat applications, the coupling provides a link between the motor and propeller shaft. Its splined profile helps resist drive slip when torque is applied, while the brass construction provides corrosion resistance in wet environments, including fresh and salt water. The insert is designed to support power transfer through the drivetrain and help reduce unwanted movement between connected components.

Features

• 4.0mm insert coupling for model boat drive systems
• Ribbed, splined shaft section for pressing into flexible universal joint couplings or rubber drives
• Solid brass construction for corrosion resistance in wet environments

The coupling is intended to create a secure mechanical connection within a marine drivetrain. Its compact insert design suits installations where a flexible universal joint or rubber drive receives the splined section. By linking the motor output with the propeller shaft, it helps deliver consistent power through the drive system while limiting drivetrain slop.