This 4mm x 4mm hex socket screw is a practical spare fastener for sewing machine upkeep. Whether a screw has been lost or worn, having a replacement on hand keeps your machine running without delays. Its compact hex socket design allows for secure tightening with the appropriate hex key or driver.

• Useful spare for routine machine maintenance
• Hex socket head for a secure, precise fit
• Affordable to stock alongside your sewing supplies