Cost Overruns

US/EU suppliers charge 30–50% more for the same grade. With metric serrated flange bolts accounting for 15% of your BOM, savings stack fast.

Loosening & Re-torquing

Serrated flange bolts that lack proper bite cause 12% more field failures. Our partial threaded flange bolt design delivers consistent clamp load.

Supply Chain Delays

Lead times from domestic mills average 14–18 weeks. Boen ships metric serrated flange bolts in 4–6 weeks — even faster for OEM partners.

Compliance Headaches

Missing certifications (CE, RoHS, ISO) hold up customs. Every batch of our partial threaded flange bolt comes with full traceability docs.

Powerful Factory, Direct Pricing

8 production lines, 12,000 m² facility. We produce metric serrated flange bolts in grades 8.8, 10.9, and 12.9 — all at factory-direct prices that beat US/EU distributors by 30–40%.

Quality Assurance, Every Batch

ISO 9001, CE, RoHS, and FCC compliant. Our partial threaded flange bolt undergoes 100% dimensional inspection, hardness testing, and salt spray analysis.

High-Speed Delivery

4–6 weeks standard, 2–3 weeks for OEM rush orders. Air freight available for urgent metric serrated flange bolts. We track every shipment until it clears your dock.

OEM/ODM Customization

Need a specific thread length, serration pattern, or coating? We design partial threaded flange bolt variants to your exact drawing — batch sizes from 5,000 to 500,000 pcs.

Agricultural Machinery

Serrated flange bolts resist vibration in harvesters & tractors.

Automotive Chassis

Partial threaded flange bolt for precise clamp load on suspension.

Construction Steel

High-strength flange bolts for structural connections.

Energy & Solar

Corrosion-resistant serrated flange bolts for solar trackers.

🔹 What is the difference between a metric serrated flange bolt and a partial threaded flange bolt?

A metric serrated flange bolt has serrations under the flange head that bite into the mating surface, preventing loosening from vibration. A partial threaded flange bolt has a smooth flange face with a partially threaded shank, offering precise grip length control for shear applications.

🔹 What grades do you offer for metric serrated flange bolts?

We stock 8.8, 10.9, and 12.9 grades in carbon steel, alloy steel, and stainless steel (304/316). All grades meet or exceed DIN 6921 and ISO 16642 standards.

🔹 Can you customize the thread length on a partial threaded flange bolt?

Absolutely. We produce partial threaded flange bolt variants with custom grip lengths to match your joint design. Just provide a drawing or specify the thread length and shank length.

🔹 What are your typical lead times?

Standard production: 4–6 weeks. OEM/custom orders: 2–3 weeks with express service. Air freight available for urgent needs. We ship to USA, Europe, and Southeast Asia weekly.

🔹 Do you provide free samples for testing?

Yes, we offer free samples of metric serrated flange bolts and partial threaded flange bolt for qualified buyers. You only cover shipping. Request yours via the form below or email us at shuan@fastenboen.com.

🔹 What payment methods do you accept?

We accept T/T (wire transfer), L/C, PayPal (for samples), and Western Union. For long-term contracts, net 30/60 terms are available after credit review.

🔹 Do you have stock in the US or Europe?

We hold buffer stock at our Handan warehouse and can ship directly to your port. We also work with 3PL partners in Rotterdam and Los Angeles for faster regional distribution.

🔹 What certifications do you provide with each shipment?

Every shipment includes ISO 9001, CE, RoHS, and FCC declarations. We also provide mill test certificates, dimensional inspection reports, and salt spray test results upon request.