Metric Flange Head Bolts & Metric Hex Flange Bolts | Buy
Metric Flange Head Bolts & Metric Hex Flange Bolts — Factory-Direct Quality for Global Industry
⚙️ Stop overpaying for inconsistent fasteners. Boen Fasteners delivers ISO-compliant metric flange head bolts and metric hex flange bolts with 37% lower TCO — engineered for automotive, agriculture & construction buyers who demand reliability + speed.
🏭 Handan Boen Fastener Mfg. Co., Ltd.
Est. 2010 · Hebei, China
❌ The Real Cost of "Cheap" Metric Flange Bolts
Every year, procurement teams lose up to 23% of their fastener budget on hidden costs — rework, downtime, failed inspections. Here’s what we hear from purchasing managers, technical directors, and ops leaders across the US and Europe:
Inflated unit prices
Distributors add 30–50% margins. You pay for middlemen, not quality.
Inconsistent dimensions
Non-conforming hex flange bolts cause assembly line stoppages. 1 hour of downtime = $8,000+.
Shipping & lead time chaos
Ocean freight volatility + slow suppliers = missed deadlines. 65% of buyers report late deliveries.
Compliance headaches
Missing CE, RoHS, or ISO docs can block your shipment at customs. Costly delays + fines.
🔍 You need a trusted metric flange head bolt supplier who combines factory-direct value with certified quality — and that’s exactly what Boen delivers.
✅ Boen Fasteners: Metric Flange Head Bolts & Hex Flange Bolts — Engineered for Performance
Our metric flange head bolts and metric hex flange bolts are manufactured to DIN 6921, ISO 16642, and GB/T 5789 standards. Every batch is tested for hardness, tensile strength, and dimensional accuracy — so your assembly line never stops.
- 🔩 Grades 8.8, 10.9, 12.9 — high-strength alloy steel, stainless steel 304/316, carbon steel
- ⚙️ M6 to M30 diameters, 16–200 mm lengths — wide stock range
- 🔧 Zinc-plated, hot-dip galvanized, Dacromet, black oxide — corrosion resistance up to 720h salt spray
- 📏 Flange diameter tolerance ±0.3 mm — guaranteed fit every time
- 📦 OEM/ODM — custom markings, packaging, and engineered designs
📊 Technical Specifications
| Parameter | Metric Flange Head Bolt | Metric Hex Flange Bolt |
|---|---|---|
| Standard | DIN 6921, ISO 16642 | DIN 6921, GB/T 5789 |
| Grade | 8.8 / 10.9 / 12.9 | 8.8 / 10.9 / A2-70 |
| Material | Alloy steel, SS304, SS316 | Carbon steel, SS304 |
| Size range | M6 – M30 | M6 – M24 |
| Coating | Zn, HDG, Dacromet, Black Oxide | Zn, Yellow Zn, Black Oxide |
| Packaging | Bulk 25kg, export cartons, OEM | Bulk 20kg, poly bags, OEM |
📐 Custom sizes & non-standard threads available — contact our engineering team.
🏗️ Real-World Applications — Where Boen Bolts Deliver
Agricultural Machinery
Metric hex flange bolts used in tractor chassis & harvesters. 10.9 grade, yellow zinc — resists vibration + corrosion.
Automotive Assembly
Flange head bolts for engine mounts & suspension. ISO 16642, 12.9 grade — zero rework in 18-month audit.
Construction Steel Structures
Hot-dip galvanized metric flange bolts for bridges & high-rises. Passed 2000h salt spray test.
Energy & Power Generation
Stainless steel hex flange bolts for wind turbine & solar tracker assemblies. 30% cost saving vs. European supplier.
❓ Frequently Asked Questions
🔹 What sizes of metric flange head bolts do you offer?
We stock M6 to M30 diameters, lengths from 16 mm to 200 mm. Custom sizes up to M42 are available for OEM orders. Contact our team for dimensional drawings.
🔹 Are your metric hex flange bolts compliant with DIN 6921?
Yes. All our metric hex flange bolts meet DIN 6921, ISO 16642, and GB/T 5789. We provide mill certificates with every batch (EN 10204 3.1).
🔹 What is your MOQ for metric flange head bolts?
Standard MOQ is 500 pcs per size. For stock sizes we can ship from 200 pcs. OEM/ODM orders require 2,000 pcs per item. We also offer sample orders (50–100 pcs) for qualification.
🔹 How do you handle shipping to USA / Europe?
We ship via sea freight (FCL/LCL) and air express (DHL, FedEx, UPS). Typical lead time: 25–35 days sea, 5–8 days air. We offer DDP terms for USA and EU buyers — no hidden customs fees.
🔹 Can you provide custom packaging with my brand?
Absolutely. We offer OEM/ODM packaging: private labels, barcode stickers, poly bags, export cartons, and wooden pallets. No extra charge for standard design.
🔹 What payment methods do you accept?
We accept T/T (30% deposit, 70% before shipment), L/C, and PayPal for sample orders. For long-term contracts we offer net 60 terms (subject to credit approval).
🔹 How do you ensure quality consistency?
Every production lot undergoes hardness testing (Rockwell), tensile testing, dimensional inspection (CMM), and salt spray testing. We also provide third-party inspection reports (SGS, TÜV) upon request.
📬 Still have questions? Contact our technical sales team — we reply within 2 hours.
⭐ What Our Customers Say
“We’ve been buying metric hex flange bolts from Boen for 2 years. Quality is consistent, delivery is on time, and pricing is 18% better than our previous supplier.”
— Lars E., Supply Chain Manager, Volvo CE
“The flange head bolts from Boen saved us 3 hours of rework per week. The flange diameter is spot-on every time. Highly recommended.”
— Chen W., Operations Manager, XCMG
“Excellent OEM support. Boen created a custom metric hex flange bolt for our solar tracker system. Fast prototyping, great communication.”
— Sarah K., R&D Engineer, Nextracker
✍️ About the Author — David Liang
David is a senior fastening engineer with 14 years of experience in metric fastener design, manufacturing, and global supply chain. He leads Boen’s technical customer support team and has personally overseen 400+ B2B fastener projects for automotive, agricultural, and energy clients across 30 countries. He writes to help procurement professionals make data-driven, cost-optimized fastening decisions.
🚀 Ready to Reduce Your Fastener Costs by 20–37%?
Get factory-direct pricing on metric flange head bolts & metric hex flange bolts. Free samples for qualified buyers. 24h quote turnaround.
🔒 Risk-free: Free samples · Money-back guarantee on first order · DDP terms available
🏭 Our Factory & Quality Center
📜 Certifications & Compliance
✅ ISO 9001:2015 · CE · FCC · RoHS · REACH · full traceability
🌍 Trusted by Leading Brands
“We switched to Boen’s metric hex flange bolts for our tractor line. 21% cost reduction + zero dimensional rejects in 6 months. Solid partner.”
“Boen’s flange head bolts cut our assembly time by 12% because of consistent flange geometry. ISO 16642 certified — exactly what we needed.”