Derale 1" Aluminium Fan Spacer with 5/8" Pilot — Clear Anodized, Includes 5/16" Hardware

If you need a reliable way to move your engine-driven fan away from accessories, pulleys, or aftermarket components, the Derale 31510 fan spacer provides a simple, durable solution. Machined from aluminum and finished with clear anodizing, this spacer combines light weight with corrosion resistance. It ships complete with a bushing and both fine and coarse 5/16" threaded hardware so you can install it on a range of popular crankshaft and water pump setups.

How does this spacer create the clearance my engine needs?

The spacer adds one full inch between the water pump/crankshaft and the fan, shifting the fan blade plane outward to avoid contact with brackets, pulleys, or shrouds. The 5/8" female pilot centers the spacer for precise alignment and steady operation. Because it's machined from aluminum, it keeps rotating mass low while remaining stiff enough for fan loads.

• 1" total length increases fan-to-engine clearance
• 5/8" female pilot ensures concentric mounting
• Aluminum body reduces added weight compared with steel

Will this fit my Chevy V8 or Ford V8 setup?

The Derale 31510 is designed to be compatible with common Chevy V8 and Ford V8 fan hubs and water pump configurations that accept a 5/8" pilot and 5/16" fan hardware. Because it includes both fine and coarse 5/16" threaded fasteners, the kit works with a wider range of factory and aftermarket pulleys. Confirm thread pitch and pilot dimensions on your application before installation.

• Works with many Chevy V8 and Ford V8 factory and aftermarket arrangements
• Includes 5/16" fine and coarse threaded hardware for fit flexibility
• Verify 5/8" pilot compatibility with your hub or pump before purchase

What materials and finish does the spacer use, and why does that matter?

The spacer is machined from aluminum and finished with a clear anodized coating. Aluminum offers an excellent strength-to-weight ratio, minimizing added rotational mass while resisting deformation. The anodized surface improves wear and corrosion resistance, helping the spacer keep a clean appearance in engine bays exposed to moisture and road salts.

• Aluminum construction for low weight and good stiffness
• Clear anodized finish enhances corrosion and wear resistance
• Precision machining ensures accurate pilot fit and fastener alignment

How easy is installation and what hardware is included?

Installation is straightforward for experienced DIYers and professional mechanics: center the spacer on the 5/8" pilot, secure with the supplied bushing and chosen 5/16" fasteners, and torque to manufacturer specifications. Derale includes both fine- and coarse-threaded 5/16" bolts so you can match the spacer to the thread pattern on your fan or pulley. No additional spacers or sleeves are required for standard compatible setups.

• Comes with a bushing and both 5/16" fine and coarse threaded hardware
• Simple bolt-on installation using the 5/8" pilot for alignment
• No extra adapters needed for typical Chevy/Ford V8 fan hubs

Who is this for: The Derale 31510 fan spacer is aimed at car enthusiasts, restoration shops, and anyone fitting aftermarket accessories (radiators, intercoolers, custom pulleys) that require additional fan clearance on Chevy V8 or Ford V8 engines. It suits owners who want a lightweight, durable spacer that simplifies fitment without fabricating custom parts. Always check your engine’s pilot diameter and thread pitch to ensure compatibility before ordering.