Hexagon Bolts Sizes & Self Tapping Hexagon Bolts DIN931 Hex Bolts | Supplier
Hexagon Bolts Sizes & Self Tapping Hexagon Bolts DIN931 Hex Bolts | Supplier
Precision Hexagon Bolts Sizes & Self Tapping DIN931 Hex Bolts | Factory Supplier
Reduce Procurement TCO by 37% with Boen Fastener's Certified Hex Bolts â M3 to M64, Grades 4.8 to 12.9
đ Table of Contents
âď¸ The Hidden Cost of Substandard Hex Bolts
In 2026, supply chain resilience and total cost of ownership (TCO) are non-negotiable. Yet, many procurement teams still face recurring failures from low-quality fasteners. Here are the critical pain points we solve daily:
â Sizing Inconsistencies
A major automotive Tier 1 supplier scrapped 2 full batches due to hexagon bolt head heights varying by 0.5mm. Our hexagon bolts sizes are held to DIN tolerance standards, ensuring interchangeability every time.
â High TCO & Frequent Strip-outs
Using under-specified self tapping hexagon bolts on a production line led to a 15% failure rate during assembly. The hidden costs of rework, downtime, and emergency sourcing added 22% to the annual fastener budget.
â Supply Chain Delays
Waiting 8-12 weeks for standard din931 hex bolts is unacceptable in today's fast-paced manufacturing environment. Our factory-direct model ensures 2-4 week lead times for standard sizes, with expedited options available.
â Lack of Certified Materials
Without proper material traceability (ISO, CE, RoHS), your company faces liability risks. We provide full mill test reports and batch traceability for every shipment of self tapping hexagon bolts and structural fasteners.
đ Boen Fastener: Engineering-Grade Hex Bolts (DIN931, DIN933, ASTM)
With over a decade of export expertise, Handan Boen Fastener Manufacturing Co., Ltd. provides precision hexagon bolts sizes M3 through M64, in strength classes 4.8, 8.8, 10.9, and 12.9. Our self tapping hexagon bolts and din931 hex bolts are trusted by automotive, construction, and agricultural machinery OEMs across 30+ countries.
We combine factory-direct pricing with a rigorous Quality Management System (ISO 9001:2015) to deliver a total cost of ownership that is 37% lower than traditional European suppliers, without compromising on reliability.
đ¨âđ 10,000+ sqm manufacturing facility in Hebei, China
đ Technical Specifications: Hexagon Bolts Sizes & Materials
Below is a comprehensive breakdown of our hexagon bolts sizes, material grades, and coatings. This data is critical for engineering verification and procurement compliance.
| Parameter | Specification / Range | Application / Benefit |
|---|---|---|
| Size Range (DIN931/DIN933) | M3, M4, M5, M6, M8, M10, M12, M16, M20, M24, M30, M36, M42, M48, M56, M64 | Covers all standard industrial applications from light machinery to heavy structural steel. |
| Strength Grades | 4.8, 5.8, 8.8, 10.9, 12.9 (Alloy Steel) A2-70, A4-80 (Stainless Steel) | 8.8 for general machinery, 10.9/12.9 for high-stress automotive/structural joints. |
| Standards Compliance | DIN931, DIN933, ISO 4014, ISO 4017, ASTM A307, ASTM A325, ASTM A490 | Fully compliant with European and American standards. Essential for international project bids. |
| Coatings & Finishes | Plain (Black/Phosphate), Zinc Plated (Clear/Yellow/Blue), Hot-Dip Galvanized (HDG), Dacromet, Geomet | Zinc plated for indoor use (72h SST). HDG/Dacromet for offshore/chemical (up to 2000h SST). |
| Thread Types | Full Thread, Partial Thread, Self Tapping Hexagon Bolts (Types AB, B, C) | Self tapping hex bolts eliminate the need for tapping operations, reducing installation time by 40%. |
| Packaging & Logistics | 25kg cartons, 1-ton bulk pallets, custom OEM kitting, barcode labeling | Reduces secondary handling. Seamless integration with your ERP/inventory system. |
đŠ Self Tapping Hexagon Bolts
Our self tapping hexagon bolts are engineered for high-speed assembly in steel, aluminum, and plastic substrates. Available in case-hardened steel (surface hardness 450-550 HV) with a core hardness of 32-40 HRC, they provide excellent thread forming without chip generation.
- đ Point Styles: Needle, blunt, and drill point (Type 17).
- âď¸ Drive: Hexagon head (DIN 571 / ISO 1479).
- đĄď¸ Coating: Geomet or Zinc Lamella for corrosion resistance.
- đ ROI: Eliminates pre-tapping, reducing installation cost per joint by up to 40%.
đ§ DIN931 Hex Bolts (Partial Thread)
The din931 hex bolts standard is the go-to for structural applications where shear strength is critical. Unlike DIN933 (fully threaded), DIN931 features a partially threaded shank, providing a larger bearing area and superior shear load capacity.
- đ Lengths: 20mm to 300mm (custom lengths available).
- đŠ Material: Carbon steel 8.8/10.9, Alloy steel 12.9, Stainless A4-80.
- đď¸ Use Case: Steel structure connections, bridge building, heavy machinery.
- đ Quality: 100% dimensional inspection per ISO 3269.
đď¸ Industry Applications & Case Studies
đ Agricultural Machinery
A leading tractor manufacturer switched to our self tapping hexagon bolts for their chassis assembly. Result: 22% faster assembly time and zero warranty claims related to fastener loosening.
đď¸ Construction & Structural Steel
A major infrastructure project specified our din931 hex bolts (Grade 10.9, HDG) for their wind turbine tower connections. Our 4-week lead time saved them 6 weeks compared to their previous European supplier.
đ Automotive Parts & Sub-Assemblies
We supply custom hexagon bolts sizes (M8-M16, 10.9 grade) to a Tier 1 automotive supplier for engine mounting brackets. Our PPM defect rate of < 50 ensures JIT production without line stops.
â Frequently Asked Questions
Q1: What hexagon bolts sizes do you offer?
We offer a comprehensive range from M3 to M64 for standard hex bolts, and up to M30 for self tapping hexagon bolts. Custom sizes are available upon request for OEM projects.
Q2: What is the difference between DIN931 and DIN933 hex bolts?
DIN931 hex bolts have a partially threaded shank, ideal for high-shear applications. DIN933 hex bolts are fully threaded, suitable for general fastening. Both are available in all standard hexagon bolts sizes.
Q3: Can you provide self tapping hexagon bolts for thin metal?
Yes. Our self tapping hexagon bolts are available with needle points and drill points (Type 17) specifically designed for thin metal, aluminum, and plastic applications.
Q4: What is the MOQ for standard hex bolts?
For standard sizes (M6-M20) in 8.8 grade, our MOQ is 500 kg per size for mixed containers. For non-standard sizes or high-strength grades (10.9/12.9), the MOQ is 200 kg per size.
Q5: How do you ensure the quality of your din931 hex bolts?
We operate a 3-stage QC process: incoming raw material inspection (chemical analysis & hardness), in-process dimensional checks, and final inspection (tensile, yield, and proof load tests per ISO 898-1). All shipments are accompanied by a Mill Test Report.
Q6: What are your shipping terms to the USA and Europe?
We ship via FOB, CIF, and DDP terms. Standard sea freight to the USA and Europe takes 25-35 days. Air freight and express (DHL/FedEx) are available for urgent sample orders.
Q7: Do you offer free samples for qualification?
Yes, we provide free samples for standard sizes (M6-M20). You only pay for the shipping cost. This allows you to verify our hexagon bolts sizes and quality before committing to a bulk order.
đ Ready to Optimize Your Fastener Supply Chain?
Get factory-direct pricing, certified quality, and 24/7 engineering support.
âł Limited Time: Free Sample Kit & Fast Shipping on First Order
Call Us
+86 15630072814
+86 13293070568
Email Us
shuan@fastenboen.com
mary@fastenboen.com
+86 15630072814
Fast Response Time < 2h
Address: Hanguang Industrial Park, Yongnian District, Handan City, Hebei Province, China
âď¸ About the Author
David Chen
Senior Fastener Engineer & Supply Chain Consultant at Handan Boen Fastener
With over 15 years in the industrial fastening industry, David specializes in helping global procurement teams reduce TCO while maintaining the highest engineering standards. He has overseen quality systems for projects in 30+ countries.
đ Trusted by Global Industry Leaders
Purchasing Manager, USA
"Boen Fastener's hexagon bolts sizes and quality are exactly as specified. We reduced our fastener TCO by 31% in the first year. Their self tapping hexagon bolts performed flawlessly on our new assembly line."
Technical Director, Germany
"We needed din931 hex bolts with full traceability for our offshore wind project. The ISO 9001 compliance and detailed MTRs provided by Boen gave us the confidence to proceed. Delivery was 3 weeks early!"
Operations Manager, UK
"The OEM kitting and barcode labeling from Boen saved us 10 hours of warehouse sorting per week. The self tapping hexagon bolts are consistently high quality."
đą Real-time feedback from our global clients