Products Description
Chainsaw Guide Bar Screw & Nut – Essential Clamping Hardware
Complete Bar Mounting Set for Chain Saw Guide Bar Installation
This guide bar screw and nut set provides the essential mounting hardware required to secure the guide bar and chain assembly to your chainsaw. The guide bar nuts clamp the bar and clutch cover firmly against the saw body, while the guide bar screws (studs) provide the threaded mounting posts that the nuts fasten onto. This hardware is critical for maintaining proper bar alignment and chain tension, ensuring safe and efficient cutting performance. Available as individual replacement parts or in complete hardware kits, these fasteners feature durable galvanized carbon steel construction with corrosion-resistant treatment for long service life. Fits most major chainsaw brands including Husqvarna, Stihl, Echo, Poulan, and Craftsman.
Technical Profiles & Materials
Clamping and Tensioning Function – The guide bar nuts tighten against the clutch cover to clamp the guide bar securely in position, while also working with the chain tensioning system to hold the bar at the correct adjustment. A properly secured bar is essential for safe operation and clean cutting .
Durable Corrosion-Resistant Construction – Manufactured from medium carbon steel with galvanized surface treatment or zinc plating for excellent corrosion resistance and long service life under demanding outdoor conditions .
Standardized M8 Thread Compatibility – The most common thread size for chainsaw guide bar nuts is M8 (8mm), with many kits including nuts in 8mm x 1.25 thread pitch. A 13mm (1/2 inch) socket or scrench is used to tighten them .
OEM-Spec Direct Replacement – Replaces genuine OEM part numbers including 1129 664 2401 for Stihl models, 530015917 for Poulan/Craftsman models, and others. Available as both OEM and quality aftermarket options .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Thread Size | M8 (8mm) x 1.25 |
| 2 | Nut Diameter | 17mm |
| 3 | Nut Height | 9.5mm |
| 4 | Stud Length | 42mm |
| 5 | Stud Thread Length | 12mm |
| 6 | Stud Diameter | 7.5mm |
| 7 | Material | Carbon Steel / Galvanized |
| 8 | Wrench Size | 13mm (1/2 inch) or 19mm |
| 9 | Kit Contents | 2 Nuts + 2 Studs |
Products Application
Guide Bar Installation & Replacement
The guide bar studs provide the mounting posts on the saw body, while the nuts secure the bar and chain assembly. When installing a new bar or chain, the nuts are tightened finger-tight initially to allow for chain tension adjustment, then fully tightened after tension is set . This hardware set provides all necessary components for a complete bar installation.
Chain Tension Adjustment
The guide bar nuts must be loosened slightly before adjusting chain tension via the tensioning screw. Once the correct tension is achieved, the nuts are tightened securely while the bar tip is held upward . Common sizes like M8 x 1.25 nuts are used on models including Poulan Pro 5020 and similar saws .
Preventative Maintenance & Hardware Replacement
Replacing worn or damaged bar nuts and studs prevents bar slippage, misalignment, and potential kickback hazards. Regular inspection of the guide bar mounting hardware is recommended as part of routine chainsaw maintenance. Multi-brand compatible kits are available, fitting Craftsman, Echo, Homelite, Husqvarna, Poulan, and Stihl models .
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm which guide bar screw and nut fits my chainsaw?
A:Check your chainsaw model number and the existing hardware. Most chainsaws use M8 thread size for guide bar nuts, with common thread pitches including 8mm x 1.25 . The nut diameter is typically 17mm and requires a 13mm wrench or scrench for tightening . For specific model compatibility, refer to OEM part numbers such as 1129 664 2401 (Stihl) or 530015917 (Poulan/Craftsman) .
Q: What are the symptoms of worn or damaged guide bar hardware?
A: Common symptoms include the guide bar slipping or moving during operation, difficulty maintaining chain tension, stripped threads on nuts or studs, and visible corrosion or wear on the hardware. Worn nuts may not hold the bar securely, leading to chain derailment or kickback hazards.
Q: What is the MOQ and lead time?
A: MOQ: 100 PCS. Delivery: 7-14 days. Neutral export carton packaging. OEM and aftermarket options are available upon request.
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