ROUND ALLEN Bolts
ROUND ALLEN bolts create a secure connection between the crank and bottom bracket. They feature a round-head design on the outside and an internal Allen interface for controlled and repeatable tightening during assembly
Both Silver Lock and Black Lock variants include thread-lock. This reduces the risk of loosening under vibration and repeated load. ROUND ALLEN bolts fit cranksets with M8x1 interfaces. They hold the crank securely in place and deliver consistent assembly results.
Key Benefits at a Glance
- Controlled Assembly: The round-head exterior and internal Allen interface allow precise, repeatable tightening during assembly.
- Thread-Lock for Secure Fastening: Thread-lock reduces the risk of loosening under vibration and repeated load.
This helps maintain a secure crank connection over time. - Surface Variants for Different Requirements: Choose silver or black coated variants based on corrosion protection needs or design preferences.
- Standardized Sizing: M8x1 thread size and strength class 10.9 fit cranksets designed for this interface.
Technical Specifications
FAQ
ROUND ALLEN bolts use a round-head exterior with an internal Allen interface for controlled and repeatable tightening during assembly.
All variants use an M8x1 thread for cranksets designed for this interface.
The difference is the surface finish. Silver Lock is silver ZN-FE-coated, while Black Lock is black ZN-FE-coated.
Thread-lock reduces the risk of loosening under vibration and repeated load. This ensures a secure crank and bottom bracket connection.
ROUND ALLEN bolts are designed for cranksets with M8x1 interfaces. Compatibility depends on the specific crank and bottom bracket.
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Our B2B Process
We work step by step to clarify what fits before it reaches your assembly line.
1. Tell Us What You Need: Share your crankset interface, bottom bracket configuration and application profile. Our experts help define the right bolt variant, including surface finish.
2. Check the Fit in Your System: We review the selected bolt within your crank and bottom bracket interface. This confirms fit and tightening conditions so it integrates smoothly into your assembly process.
3. Produce with Confidence: You receive clear specifications for assembly and production. This keeps variability low and supports consistent results across your series.
