We are excited to announce the launch of a newly developed heavy-duty flanged bolt with partial thread — a precision-engineered fastener designed for high-load, high-reliability applications across industrial and structural sectors.
Product Overview
🔩 Material
Manufactured from Grade 10.9 / 12.9 alloy steel, this bolt delivers exceptional tensile strength and fatigue resistance, making it suitable for demanding mechanical assemblies where standard carbon steel bolts fall short.
🛡️ Surface Treatment
The bolt features a black oxide (blackening) finish, providing moderate corrosion resistance while maintaining dimensional precision. The dark matte surface also reduces light reflection — ideal for applications where aesthetics and stealth matter alongside function.
💪 Strength Grade
Available in Grade 10.9 and 12.9, with proof load and yield strength values conforming to ISO 898-1 standards. The head is stamped with grade markings and manufacturer identification for full traceability.
🏭 Applications
- Heavy machinery and construction equipment
- Automotive and commercial vehicle chassis assemblies
- Structural steel connections
- Mining and energy equipment
- Hydraulic and pneumatic system mounting
Design & Engineering Highlights
The second image shows the flanged hex head in detail — a critical design feature that sets this bolt apart from standard hex bolts:
- Integrated flange washer: Distributes clamping load over a larger bearing surface, eliminating the need for a separate flat washer and reducing assembly steps.
- Partial thread (grip length shank): The unthreaded shank section provides a precise shear-resistant grip zone, critical for joints subject to lateral forces and vibration.
- Fine thread pitch option: Enables higher preload with less torque and improved resistance to self-loosening in dynamic environments.
- Grade marking on head face: Full traceability with manufacturer code and strength class stamped directly on the flange face — visible even after installation.
- Tight dimensional tolerances: Manufactured to DIN/ISO standards with controlled thread runout and head perpendicularity for consistent assembly performance.
Commercial Terms
| Parameter | Details |
|---|---|
| Minimum Order Quantity (MOQ) | 30,000 pcs |
| Lead Time | 30 days from order confirmation and deposit receipt |
| Packaging | Bulk carton / small box inner packing (customizable) |
| Certification | Material test report, hardness report, dimensional inspection report available |
| Custom Options | Thread size, length, grade, surface treatment, head marking |
Custom Development Capabilities
This bolt is a showcase of our custom fastener development program. If you have a similar application requirement, we can develop equivalent or derivative products based on your drawings or samples, including:
- Non-standard thread forms (UNC, UNF, BSW, metric fine)
- Alternative surface treatments: zinc plating, hot-dip galvanizing, Dacromet, Geomet, phosphate
- Different head styles: hex, hex flange, 12-point, socket head
- Special alloys: stainless steel 304/316, titanium alloy, B7 stud material
- OEM private labeling and custom packaging
Our engineering team works directly with procurement and design engineers to validate specifications before mass production, ensuring first-article approval and zero-defect delivery.
Get a Quote
Interested in this product or a similar custom fastener? Contact the FULLERKREG team with your specifications — thread size, length, grade, quantity, and surface requirement — and we will respond with a competitive quotation within 24 hours.
📧 Email: sales@fullerkr.com
🌐 Website: www.fullerkr.com
FULLERKREG — Precision Fasteners, Engineered for Performance.