Caterpillar 8N5581 Stud

The Cat 8N-5581 is a genuine Caterpillar bolt stud with a 1/2-13 thread on both ends, purpose-built as a dual-ended fastener for belt tensioner assemblies in Cat equipment, delivering a robust, OEM-grade connection that resists vibration and load. Designed to pass through a component and be secured with nuts on each end, this stud provides a straightforward, repeatable clamping solution for belt-tensioner hardware while preserving proper alignment and torque characteristics. Cat describes its fastener parts as engineered for specific applications based on size, strength, clamp load, and performance history, and 8N-5581 is cataloged as a 1/2-13 threaded bolt stud intended for precise Caterpillar installations. When sourcing, reference part number 8N-5581 to ensure compatibility with your belt-tensioner setup and rely on Cat’s specification-driven approach to maintain consistent fit, function, and long-term reliability in your Caterpillar machine.