M12 Cap Head Bolt & M4 Cap Head Bolt | Supplier
M12 Cap Head Bolt & M4 Cap Head Bolt
Precision Fasteners for Industrial Demands
๐จ๐ณ China-based factory delivering ISO 9001 cap head bolts with 30% cost savings โ no minimum order quantity, global logistics, and full traceability.
โ 10,000+ bolts in stock ยท โ 10+ years export ยท โ 30+ countries served
๐ธ Real production line โ Handan, China
โ ๏ธ Why Your Current M12 Cap Head Bolt & M4 Cap Head Bolt Supply Hurts Your Bottom Line
Procurement teams across automotive, agriculture, and construction sectors face three repeating nightmares:
Price Volatility & Hidden Costs
Global steel prices swung ยฑ22% in 2025. Middlemen inflate M4 cap head bolt costs by 35โ50%. Your current supplier may not pass down savings.
Inconsistent Quality & Failures
A single batch of substandard m12 cap head bolt can halt your assembly line. 17% of buyers report thread galling or head shearing below rated torque.
Shipping Delays & Minimum Order Traps
Waiting 8โ12 weeks for MOQ of 10,000 pcs? Small-to-mid buyers get deprioritized. 43% of operations managers report stockouts due to inflexible supply.
๐ The result: higher TCO, missed deadlines, and frustrated engineering teams.
โ Our M12 Cap Head Bolt & M4 Cap Head Bolt โ Engineered for 2026
Factory-direct, fully traceable, and built to international standards. No middlemen, no surprises.
Powerful Factory
10+ lines, 15M+ pcs/year capacity. We control the full process from raw material to packaging.
Quality Assurance
ISO 9001, RoHS, CE. 100% dimensional inspection, hardness test, and salt spray test on every batch.
OEM/ODM Design
Custom head marking, coating (zinc, Dacromet, Geomet), and packaging. Your brand, our precision.
High-Speed Delivery
Stock items ship in 7โ12 days. Custom orders in 20โ25 days. Air freight available for emergencies.
๐ Technical Specifications โ M12 Cap Head Bolt & M4 Cap Head Bolt
| Parameter | M12 Cap Head Bolt | M4 Cap Head Bolt |
|---|---|---|
| Thread Diameter | 12 mm | 4 mm |
| Thread Pitch | 1.75 mm (coarse) | 0.7 mm (coarse) |
| Head Style | Socket cap / Hex cap | Socket cap |
| Grade / Material | 8.8 / 10.9 / 12.9 โ Alloy Steel, SS304, SS316 | 8.8 / 10.9 โ Alloy Steel, SS304 |
| Surface Finish | Black oxide, Zinc plated, HDG, Dacromet | Zinc plated, Ni plated, Passivated |
| Tensile Strength (min) | 800โ1,200 MPa (depending on grade) | 800โ1,040 MPa |
| Hardness (HRC) | 22โ38 HRC | 22โ32 HRC |
| Standard Compliance | DIN 912, ISO 4762, ANSI B18.3 | DIN 912, ISO 4762 |
๐ง Real-World Applications
- ๐ Agricultural Machinery โ M12 cap head bolt for harvester frames, M4 for control panel mounts
- ๐ Automotive Components โ M12 used in engine brackets, M4 in electronics enclosures
- ๐๏ธ Construction Equipment โ High-strength m12 cap head bolt for structural joints
- โ๏ธ Industrial Automation โ Precision M4 for sensor brackets and rail systems
๐ก Case in point: A German tractor OEM switched to our m12 cap head bolt and cut fastener costs by 31% while improving torque consistency.
๐ฌ Real Conversations with Our Clients
๐ฑ Direct WhatsApp communication โ fast, transparent, and binding.
โ Frequently Asked Questions โ M12 Cap Head Bolt & M4 Cap Head Bolt
๐น What grade of m12 cap head bolt do you recommend for heavy structural loads?
For structural applications we recommend grade 10.9 or 12.9 alloy steel with zinc or Dacromet coating. These offer tensile strength up to 1,200 MPa and are compliant with ISO 4762. We also supply SS316 for corrosive environments.
๐น Can you provide custom head marking on m4 cap head bolt?
Yes. We offer OEM/ODM custom head stamping with your brand or grade mark. Minimum order for custom marking is 5,000 pcs. Lead time 20โ25 days.
๐น What is the minimum order quantity (MOQ) for m12 cap head bolt?
For standard sizes and materials, our MOQ is 1,000 pcs. For non-standard or custom coatings, MOQ is 3,000 pcs. We welcome small trial orders to qualify our quality.
๐น How do you ensure quality consistency across batches?
Every batch undergoes dimensional inspection, hardness test (HRC), tensile test, and salt spray test. We provide a Certificate of Conformance (CoC) with each shipment. Third-party inspection (SGS, TรV) is available upon request.
๐น What shipping options do you offer to USA/Europe?
We ship via sea freight (FOB/CIF/DDP) and air freight for urgent orders. Typical transit time: sea 25โ35 days to US/Europe, air 5โ8 days. We handle all customs documentation.
๐น Do you offer free samples for m4 cap head bolt?
Yes, we provide free samples for standard items. You only pay shipping. Sample delivery takes 3โ5 days via express. Contact us with your requirements.
๐น What payment terms do you accept?
We accept T/T (30% deposit, 70% before shipment), L/C, and PayPal for small orders. For long-term contracts, we can negotiate net 30/60 terms subject to credit approval.
๐น How do I start a procurement inquiry?
Simply click the "Get Free Quote in 24h" button below, or email us directly. Provide your target quantity, grade, and delivery timeline. We'll respond with a detailed quotation within 24 hours.
โญ What Our Customers Say About M12 Cap Head Bolt & M4 Cap Head Bolt
Real reviews from real buyers โ no fake testimonials.
"We use 12.9 grade m12 cap head bolt for our chassis jigs. Boen's quality is on par with European brands at 40% lower cost. The batch traceability is excellent."
"The M4 cap head bolt is perfect for our PCB mounting fixtures. Zero thread galling in 50,000 units. Fast sample delivery too."
"Ordered 20,000 pcs of m12 cap head bolt. Delivered in 11 days to Manchester. The DDP shipping made customs hassle-free. Will order again."
Chen has overseen over 1,200 fastener export projects to 30+ countries. He specializes in bolt material science, coating technology, and cost-optimized sourcing. His technical audits have helped clients reduce fastener-related assembly failures by up to 60%.
Ready to Secure Your M12 Cap Head Bolt & M4 Cap Head Bolt Supply?
Get a factory-direct quote, free samples, and a dedicated account manager within 24 hours. No pressure, no hidden fees.
๐ Your information is secure. We never share your data. Privacy Policy
๐ Trusted by Engineers & Procurement Teams Worldwide
ISO 9001:2015
CE / RoHS
UL Recognized
"We switched our m12 cap head bolt supply to Boen. 28% cost reduction and zero defects in 6 months. Their traceability reports are a lifesaver for our ISO audit."
"The M4 cap head bolt from Boen fits our precision jigs perfectly. Consistent thread quality, and the Dacromet coating passes our 720h salt spray test."
"Fastest delivery from China to Dubai โ 9 days for 50,000 pcs of m12 cap head bolt. Custom packaging with our logo included. Highly recommended."