Husqvarna 539990591 3/8" x 4-1/2" Hex Cap Screw (HCS) – Replacement Lawn & Garden Equipment Hardware

Part Number: 539990591
Category: Lawn & Garden Equipment Replacement Hardware
Type: 3/8" x 4-1/2" Hex Cap Screw (HCS) – Replacement Lawn & Garden Equipment Hardware

The Husqvarna 539990591 3/8" x 4-1/2" Hex Cap Screw (HCS) is a replacement fastening component designed for compatible Husqvarna lawn and garden equipment. Featuring a specified 3/8-inch diameter and 4-1/2-inch length, this hex cap screw is intended for securing applicable brackets, housings, structural components, and mechanical assemblies. Ideal for replacing a bent, stripped, corroded, worn, damaged, or missing fastener, the 539990591 helps restore secure component attachment within compatible equipment assemblies.

Product Specifications

• Part Number: 539990591
• Brand: Husqvarna
• Product Type: Hex Cap Screw (HCS)
• Fastener Diameter: 3/8"
• Fastener Length: 4-1/2"
• Component Type: Replacement Fastening Hardware
• Application: Lawn & Garden Equipment
• Function: Component Fastening, Mounting & Retention
• Condition: New

Features & Benefits

• Replacement hex cap screw for compatible Husqvarna equipment
• Features a specified 3/8" diameter
• Measures 4-1/2" in length
• Hex-head configuration allows installation and removal using the appropriate wrench or socket
• Designed to secure applicable equipment components and mechanical assemblies
• Helps maintain proper positioning and secure attachment of mating components
• Suitable for replacing bent, stripped, corroded, worn, damaged, or missing fasteners
• Practical replacement hardware for equipment maintenance, repair, and restoration

Applications

• Husqvarna lawn and garden equipment
• Compatible outdoor power equipment
• Equipment mounting assemblies
• Bracket and structural connections
• Housing and frame assemblies
• Mechanical component attachment
• Replacement of worn or missing fasteners
• Equipment repair and restoration
• Routine lawn and garden equipment maintenance

Important Notes

• Verify part number 539990591 before ordering
• Confirm compatibility with your specific Husqvarna equipment model and assembly
• Verify the required 3/8" diameter and 4-1/2" length against the original fastener
• The exact thread pitch is not identified in the supplied product information; confirm the required thread specification before installation
• Compare the original fastener’s thread diameter, thread pitch, overall length, threaded length, head dimensions, grade, finish, and overall configuration
• Do not substitute a fastener based solely on diameter and length
• Verify whether the application requires a specific fastener grade, thread type, finish, washer, nut, spacer, or locking method
• Inspect mating nuts, threaded holes, brackets, washers, spacers, and mounting surfaces for damaged or stripped threads
• Do not force the screw into incompatible, cross-threaded, or damaged threads
• Tighten according to the equipment manufacturer’s specified installation procedure and torque requirements