Strip-outs & Rework

62% of maintenance teams report fastener failure from sub-grade 4mm button head screws, leading to 11+ hours of unplanned downtime per month. Our 12.9-grade alloy eliminates strip-outs.

Inconsistent Supply & Lead Times

Broker-mediated 5/16-18 button head socket cap screws often carry 28-45 day lead times. Our factory ships 90% of orders within 10 working days.

Hidden Cost of Poor Quality

A single batch of non-compliant fasteners can cause $14,000+ in warranty claims and lost contracts. We provide full material certs + traceability.

Compliance & Tariff Confusion

Navigating CE, RoHS, and REACH for the US/EU markets is complex. We handle all documentation — you stay compliant.

Factory-Direct Power

Own tooling & 12 cold-forming lines. 32% lower cost than distributor prices.

Full Traceability

Heat numbers, material certs, and dimensional reports included with every batch.

10-Day Express

Air + sea to US/EU. 30+ countries with real-time tracking.

📸 Hanguang Industrial Park, Handan — 12 cold-forming lines

✅ Certifications & Compliance

ISO 9001:2015 • CE • RoHS • REACH • ASTM F835 compliant. Full documentation package available per shipment.

Markus V. — Procurement Lead, Germany

“We switched to Boen for our 5/16-18 button head socket cap screws. 32% cost savings and zero non-conformances in 8 months. The traceability reports are a game-changer.”

Sarah L. — Operations Manager, UK

“Their 4mm button head screw quality is superior to our previous supplier. Downtime reduced by 19% and the team is incredibly responsive.”

🔹 What grade of steel do you use for 4mm button head screws?

We use 10.9 and 12.9 alloy steel (SCM435) and 304/316 stainless. All material certs are provided with each shipment. Our 12.9 grade achieves HRC 38-44 hardness.

🔹 What is the typical lead time for 5/16-18 button head socket cap screws?

Standard sizes ship within 10 working days. Custom platings or dimensions may take 15-18 days. We offer air freight for urgent orders — typically 5-7 days door-to-door to US/EU.

🔹 Do you offer OEM/private label packaging?

Yes. We custom-brand boxes, poly bags, and kitting with your logo, barcode, and part numbers. MOQ is 10,000 pcs per SKU for custom packaging.

🔹 How do you handle quality control?

Every batch undergoes dimensional inspection, hardness testing, and plating thickness verification. We provide a Certificate of Conformance with each shipment. Third-party inspection (SGS, TÜV) is available at cost.

🔹 What payment terms do you offer?

We accept T/T (30% deposit, 70% before shipment), L/C at sight, and for qualified buyers — net 60 terms after credit evaluation. PayPal is available for samples.

🔹 Do you provide free samples for testing?

Yes. We offer free samples for qualified OEM/ODM projects. You only pay shipping. Request a sample kit via the form below or email us directly.

🔹 How do you handle shipping to the USA or Europe?

We ship via FOB Tianjin/CIF Hamburg or DDP terms. Our logistics team handles all customs documentation. Typical ocean freight: 25-30 days to US West Coast, 30-35 days to EU.

Andrei P. — Machinery OEM, Poland

“We use 4mm button head screws in our packaging line. Boen’s product is consistently within tolerance and the black oxide finish holds up perfectly. 5/5.”

James T. — Supply Chain Mgr, USA

“The 5/16-18 button head socket cap screws are a perfect fit for our heavy equipment. Delivery was 9 days early and the documentation was flawless.”

Lena W. — Purchasing Specialist, Netherlands

“We compared three suppliers and Boen offered the best TCO by 27%. The sample kit arrived in 4 days. Highly recommended for European buyers.”