Husqvarna Hex Bolt 3/8-16 OEM #596564404

Husqvarna Hex Bolt 3/8-16 OEM #596564404 — Genuine Fin Hex Head Bolt 3/8-16 UNC x 2-1/4″ for Husqvarna Riding Mowers & Lawn Tractors

Keep your Husqvarna riding mower and lawn tractor components securely fastened with the genuine Hex Bolt, OEM part number 596564404. This factory-original fastener is officially designated Bolt Fin Hex 3/8-16 UNC X 2-1/4″ — a flanged hexagon head bolt used throughout the deck, chassis, and drivetrain assemblies of Husqvarna riding mowers and lawn tractors.

The 3/8-16 UNC (Unified National Coarse) thread specification is one of the most common fastener standards used in Husqvarna outdoor power equipment. The hexagon fin head design provides greater bearing surface area than a standard hex bolt, distributing clamping load more effectively and resisting pull-through in softer materials. At 2-1/4″ in length, this bolt is sized for specific assembly depths across a wide range of Husqvarna mower deck, chassis, and accessory attachment applications. This bolt is generally used in securing pulleys and other structural components where a reliable, vibration-resistant fastener is critical to equipment safety and performance.

Using the exact OEM-specification bolt is essential — incorrect thread pitch, length, or head style can result in inadequate clamping force, stripped threads, component loosening during operation, or structural failures that create safety hazards.

Compatible Equipment: This part works with Husqvarna lawn tractors, lawn mowers, and lawn tractor accessories. Fits a wide range of Husqvarna riding mowers and lawn tractors including the 2246 LS, 2346 XLS, GT 180, GT 2254, GTH 2254 XP, GTH 2654, GTH 2754, YTH21K46, WH and WHF series commercial walk-behinds, and many more. Manufactured by Husqvarna for Husqvarna, Craftsman, Jonsered, Poulan, Weed Eater, RedMax, American Yard Products, and Bluebird.

Replaces: Replaces obsolete part numbers 539130011, 539990629, 583614801, 874520636, and 874780636.

Always verify compatibility with your specific model and serial number before ordering. Consult your parts diagram to confirm the correct application location and required quantity.