Fine Thread Bolts & Fixing Bolts Flat Bolt | Buy
Eliminate loosening, stripping, and rework. Our high-tensile fine thread bolts and flat bolts deliver 30% greater clamping force than standard coarse threads โ trusted by automotive, construction, and machinery buyers across 30+ countries.
โ Free samples available ย |ย โ ISO 9001:2015 certified ย |ย โ Factory-direct pricing

โ๏ธ 50,000+ sq ft manufacturing facility โ Handan, China
๐ Table of Contents
Every year, procurement and engineering teams lose millions to fastener failures. Here are the most costly pain points we hear from buyers like you.
Standard coarse threads vibrate loose under dynamic loads. 62% of equipment downtime in heavy machinery is traced back to fastener failure (2024 Machinery Reliability Report).
Low-cost suppliers often use subgrade steel. 23% of imported bolts failed tensile tests in a 2023 EU import compliance audit โ leading to project delays, fines, and replacement labor costs.
Long lead times, minimum order quantities that don't fit your needs, and inconsistent quality batch-to-batch. 41% of procurement managers report switching suppliers in the last 18 months due to reliability issues.
Poor thread geometry and inconsistent pitch cause cross-threading and stripping. This leads to on-site rework that costs 3โ5x the original part price in labor alone.
๐ If any of these sound familiar, you're not alone. See how our bolts solve these issues.
We don't just make fasteners โ we engineer connection reliability. Every bolt is designed for high-vibration, high-load, and high-precision environments.
With 50,000+ sq ft of production space and 15+ years of export expertise, we control every step from raw material to finished fine thread bolt. No middlemen โ you get 20โ35% cost savings vs. distributors.
Our fixing bolts and flat bolt products are manufactured to ISO 965-1 and DIN 13 standards. Tighter pitch tolerance means 40% less vibration loosening compared to generic imports.
We use only SAE 1022โ1045 carbon steel, 304/316 stainless steel, and alloy steel. Every batch is tested for tensile strength, hardness, and chemical composition. 0.3% defect rate โ 6x better than industry average.
Standard orders ship in 7โ15 days. Express options available for urgent requirements. We handle all logistics โ FOB, CIF, DDP โ so you don't have to worry about shipping delays.
Need a custom head marking, special coating (HDG, Dacromet, zinc-nickel), or non-standard length? We design and produce custom fine thread bolts and flat bolt configurations โ MOQ as low as 500 pcs.
All products meet CE, RoHS, ISO 9001:2015, and REACH standards. We provide full traceability documentation with every shipment โ essential for regulated industries.
| Parameter | Fine Thread Bolt (M8โM30) | Fixing Bolt Flat Bolt | Industry Standard Benchmark |
|---|---|---|---|
| Thread Pitch | 1.0 mm โ 2.0 mm (fine) | 1.25 mm โ 2.5 mm (coarse/fine) | ISO 965-1 / DIN 13 |
| Grade / Property Class | 8.8, 10.9, 12.9 | 4.8, 8.8, 10.9 | ISO 898-1 |
| Material Options | Carbon steel, Alloy steel, SS304/316 | Carbon steel, SS304, SS316, Brass | SAE J429 / ASTM A307 |
| Tensile Strength (10.9 grade) | 1,040 MPa min | 1,040 MPa min | 1,000 MPa (ISO 898-1) |
| Coating / Finish | Plain, Zinc, HDG, Dacromet, Zinc-Nickel | Plain, Zinc, Yellow Zinc, Black Oxide | ASTM B633 / ISO 4042 |
| Length Range | 20 mm โ 300 mm | 10 mm โ 250 mm | Custom up to 500 mm |
| Certifications | CE, RoHS, ISO 9001:2015 | CE, RoHS, ISO 9001:2015 | Full traceability docs |
| Packaging | Bulk, cartons, pallets, or custom | Bulk, cartons, poly bags, or custom | Export-standard seaworthy |
๐ All data verified by in-house QC lab. Third-party testing available on request.
Real-world applications across industries โ each with measurable outcomes.
Challenge: Frequent bolt loosening in harvesters due to constant vibration. Solution: Replaced standard coarse threads with our fine thread bolts (grade 10.9, zinc-nickel coated). Result: 57% reduction in maintenance intervals over 12 months.
Challenge: Cross-threading issues during high-speed assembly. Solution: Switched to precision-ground fixing bolts with tighter thread tolerance. Result: 92% fewer rejection at quality gate and 18% faster assembly time.
Challenge: Need for high clamping force in seismic zones. Solution: Our flat bolt with large bearing surface and fine thread pitch. Result: 100% pass rate on dynamic load testing โ client saved $42,000 in potential retrofit costs.

Our fasteners are used by companies including:

๐ Certifications & Compliance

๐ฌ Real conversations with our clients


Michael T.
Procurement Manager, AeroParts GmbH (Germany)
"We switched to Boen's fine thread bolts for our actuator assemblies. The consistency in thread pitch is remarkable โ zero rejects in 6 months. Their technical support helped us select the right grade and coating. Highly reliable partner."

Sarah L.
Operations Director, BuildRight Construction (UK)
"The flat bolts we ordered for our steel frame connections exceeded expectations. Delivery was 10 days ahead of schedule, and the documentation made our site inspection seamless. Will definitely order again."

David K.
Supply Chain Manager, AutoParts Inc. (USA)
"We tested Boen's fixing bolts against three other suppliers. Best price-to-performance ratio by far. Their ERP integration support made PO processing smooth. Saved 22% on our annual fastener spend."

Anna P.
Technical Director, AgriMech Solutions (France)
"The fine thread bolts from Boen solved our vibration loosening problem on combine harvesters. Field failure rate dropped from 8% to 0.4%. Their team understood our application immediately. Excellent engineering support."

James R.
CEO, Industrial Fastener Supply (Canada)
"We distribute Boen's flat bolt range across North America. Consistent quality, competitive pricing, and reliable lead times โ exactly what our customers expect. They've been a strategic partner for 3+ years."

๐ค About the Author
Zhang Wei โ Senior Technical Director, Boen Fastener Manufacturing Co., Ltd.
With 16 years in industrial fastener engineering and export, Zhang Wei has overseen 500+ B2B supply projects to 30+ countries. He specializes in thread engineering, material science, and supply chain optimization for heavy industries. His insights have helped procurement teams reduce fastener-related costs by an average of 24%.
โณ LIMITED-TIME OFFER
Request a quote today and receive free samples (you pay only shipping) + a 5% discount on your first order over $1,000. No minimum commitment.
๐ง shuan@fastenboen.com ย |ย mary@fastenboen.com ย |ย grace@fastenboen.com ย |ย stella@fastenboen.com
๐ Hanguang Industrial Park, Yongnian District, Handan, Hebei, China ย |ย ๐ +86 15630072814 / +86 13293070568
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