Husqvarna Bolt 3/8-16X3.5″ OEM #539108271
Scratch ’n’ Dent means you’re getting a brand-new working machine with a tiny cosmetic hiccup—nothing that keeps it from doing the job, just enough to save you a little money.
Keep your Husqvarna riding lawn tractor’s mower deck assembly securely fastened with this Genuine OEM Bolt (Part #539108271). Identified as an HCS 3/8-16 x 3-1/2 Grade 5 zinc-plated bolt used in the mower deck assembly on select Husqvarna riding tractors, this factory-authorized hardware is precision-manufactured to exact Husqvarna thread, length, grade, and finish specifications — ensuring the correct clamping force, corrosion resistance, and structural integrity required for reliable mower deck performance season after season.
Bolt Specifications:
- Thread Size: 3/8-16 UNC (Unified National Coarse)
- Length: 3-1/2 inches (3.5″)
- Grade: Grade 5 — medium-strength heat-treated steel
- Finish: Zinc-plated (ZD) for corrosion resistance
- Head Style: Hex Cap Screw (HCS)
Why Grade 5 OEM Bolts Matter:
Not all bolts are created equal. Grade 5 designation means this bolt is manufactured from medium-carbon steel and heat-treated to achieve a minimum tensile strength of 120,000 PSI — far stronger than common hardware store Grade 2 fasteners. In mower deck applications, bolts are subjected to constant vibration, impact loads from blade strikes, seasonal temperature cycling, and outdoor moisture exposure. Using an incorrect grade, length, or thread specification can result in fastener failure, deck misalignment, or dangerous component detachment during operation. The zinc plating provides an additional layer of corrosion protection essential for components exposed to grass, moisture, and outdoor conditions year-round.
Signs This Bolt Needs Replacement:
- Visible thread stripping, deformation, or corrosion
- Bolt sheared, bent, or broken from blade strike or impact
- Fastener unable to achieve or maintain proper torque specification
- Rounded hex head making installation or removal difficult
- Routine deck service, removal, or rebuild requiring fresh hardware
Key Features:
- Genuine Husqvarna OEM part — not an aftermarket or generic hardware store substitute
- 3/8-16 x 3-1/2″ Grade 5 hex cap screw — factory-correct thread, length, and strength grade
- Zinc-plated finish for superior corrosion resistance in outdoor mower deck environments
- Manufactured to exact Husqvarna dimensional and material specifications for proper fit and torque
- Maintains secure mower deck assembly, reducing vibration-induced loosening during operation
- Direct OEM replacement — installs to factory specification without modification
Compatibility:
This bolt fits select Husqvarna riding lawn tractor models including the YTH2648 TF series and other compatible models that use this deck hardware specification. Always confirm fitment using your Husqvarna model and serial number — found on a label under the seat or on the equipment frame — and cross-reference against your unit’s Illustrated Parts List (IPL) before ordering to verify this is the correct bolt length, thread, and grade for your specific assembly point.
Part Details:
- Part Number: 539108271
- OEM Brand: Husqvarna
- Part Type: Hex Cap Screw (HCS) Bolt
- Thread: 3/8-16 UNC
- Length: 3-1/2″ (3.5″)
- Grade: Grade 5
- Finish: Zinc-Plated (ZD)
- Application: Mower Deck Assembly
- Condition: New / Genuine OEM
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| Weight | 1 lbs |
|---|---|
| Dimensions | 4 × 4 × 2 in |
| MPN |
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