High Price, Low Value

Stop paying premium prices for mid-grade 10.9 screws. Western distributors often mark up standard fasteners by 200-300%. You deserve 12.9 grade strength at factory-direct prices.

Inconsistent Quality & Failures

Poor heat treatment and loose tolerances lead to stripping, galling, and catastrophic assembly failures. A single field failure costs 10x more than a quality fastener.

High Shipping Costs & Delays

Unreliable suppliers miss deadlines and inflate logistics costs. We offer consolidated shipping and flexible terms (FOB, CIF, DDP) to protect your margins.

Vibration Loosening Risks

Standard bolts fail under dynamic loads. Our drilled metric socket head cap screws allow for critical safety wiring, eliminating the risk of loosening in aerospace, automotive, and heavy machinery.

Powerful Factory

Est. 2010. 30+ countries served. Vertical integration from raw material to finished product.

Quality Assurance

ISO 9001 certified. 100% dimensional inspection. MILL CERT provided with every shipment.

High-Speed Delivery

15-25 days lead time for standard metric sizes. OEM/ODM prototypes in 7 days.

John M. - Procurement Manager, US Automotive Tier 1

"We switched to Boen's drilled socket head screws for our engine assembly. The consistent torque specs and precise metric threading reduced our rework rate by 18%. The 12.9 grade is real."

Klaus D. - Technical Director, German Machine Tools

"Finally, a Chinese supplier that understands metric precision. The DIN 912 compliant cylinder head screws fit perfectly in our robotic arms. Excellent corrosion resistance."

Sarah L. - Supply Chain Manager, UK Agricultural Equipment

"Boen's drilled metric socket head cap screws withstood our extreme vibration tests. The safety wire hole is precisely drilled. We have reduced our fastener budget by 25%."

Marco R. - Operations Manager, Italian Motorsports Supplier

"The quality of the 12.9 grade hexagon socket screws is outstanding. Perfect for high-torque applications. DDP shipping made the logistics seamless."

A: The primary advantage is safety. The precision-drilled hole allows for safety wiring, which physically locks the screw in place. Combined with the hexagon socket drive (which allows for higher torque and reduces cam-out), it provides superior vibration resistance compared to standard external hex bolts.

A: Yes, we specialize in drilled metric socket head cap screws. We offer a full range of metric sizes from M3 to M36, in both coarse and fine thread pitches, fully compliant with DIN 912 and ISO 4762 standards.

A: For standard metric sizes (M3-M20), our MOQ is 1,000 pieces. Lead time is typically 15-25 days. For high-volume or custom OEM orders, please contact us for optimized scheduling.

A: Absolutely. We provide OEM/ODM services for custom lengths, exotic materials (316 Stainless Steel, Inconel), and specialty coatings (Geomet, Delta Tone). Send us your drawings or samples for a tailored engineering quote.

A: We are ISO 9001 certified. Every batch of cylinder head screw with hexagon socket undergoes hardness testing, tensile testing, and dimensional inspection. We provide a full inspection report (MILL CERT) with every shipment.

A: Yes, we export to 30+ countries, including USA, Germany, UK, and France. We handle all logistics, including customs clearance. Our standard shipping terms are FOB, CIF, or DDP (Delivered Duty Paid) for full cost control.

A: The primary method is safety wiring. After torquing the screw to the specified value, thread a stainless steel safety wire through the drilled hole. This creates a tensioned system that prevents any rotation, making it mandatory in aerospace, motorsports, and high-speed machinery.