Price ≠ Value

A UK-based machinery buyer saved 12% on a bulk order of cap in the head bolts, only to face a 23% rejection rate due to inconsistent thread pitch. Rework cost: £4,700.

Shipping Delays Eat Margins

A US distributor lost a $120k contract because their head cap supplier missed the window by 3 weeks. We ship 95% of orders within 18 days.

Inconsistent Heat Treatment

A German automotive parts manufacturer reported that 1 in 50 cap of head sockets failed torque testing. We test every batch to ASTM A574.

Documentation Gaps

Without proper mill certs and traceability, your compliance team rejects the shipment. We provide full MTR + COC with every order.

Powerful Factory — 50,000 sqm

Our facility in Handan, China runs 120+ cold-forging presses, 80 CNC lathes, and automated heat treatment lines. Annual capacity: 30,000+ tons of 3 head socket and other fasteners.

Quality Assurance You Can Trust

Every head cap screw batch undergoes: hardness testing (HRC 38-44), thread gauging, tensile strength verification, and 24h salt spray testing. Defect rate < 0.08%.

High-Speed Delivery — 18 Days Average

From PO to port: standard cap in head socket screws ship in 12-18 days. Express options available. We manage all logistics: FOB, CIF, DDP — you choose.

OEM/ODM Design Expertise

Need a customized cap on head with a specific drive, coating, or thread length? Our engineering team delivers prototypes in 7 days and production within 21 days.

Factory-Direct Pricing — Save 15-35%

No middlemen. No markup. Compare our cap of head socket screw pricing against any distributor. We guarantee the best cost-performance ratio in the industry.

Global Compliance — ISO, CE, RoHS, REACH

All cap in the head products meet ASTM A574, ISO 4762, DIN 912, and ASME B18.3. Complete documentation for your QA team.

Agricultural Machinery

High-vibration joints in tractors, harvesters, irrigation systems

Automotive Assembly

Engine components, chassis, braking systems — cap in head socket screws used in critical torque applications

Construction & Structural

Steel framing, heavy equipment anchoring, formwork systems

Industrial Machinery

Presses, conveyors, robotic arms, and production line tooling

Marcus Weber Procurement Manager, Germany

"We switched to Boen for our 3 head socket fasteners. The consistency is remarkable — zero defects in 6 months. 18% cost savings vs our previous supplier."

Jennifer Chen Supply Chain Director, USA

"The head cap screws arrived 4 days early. Full traceability, perfect documentation. Our compliance team is impressed. Boen is now our primary fastener supplier."

David O'Brian Operations Manager, UK

"We needed custom cap in head socket screws for a special project. Boen delivered prototypes in 6 days. Production quality was flawless."

Q1: What is the difference between a cap in head socket screw and a standard bolt?

A cap in head (socket head cap screw) has a cylindrical head with a hexagon socket drive, designed for high-torque applications where a low-profile, clean appearance is required. Standard bolts typically have external hex heads. Socket cap screws offer better torque control and are ideal for tight spaces.

Q2: What grades of cap on the head socket screws do you offer?

We stock 10.9 and 12.9 grade alloy steel as standard, plus stainless steel 304/316 and 17-4PH. For custom requirements, we can match any grade specification. All cap on head products meet ASTM A574 and ISO 4762.

Q3: What is the minimum order quantity (MOQ) for head cap socket screws?

For standard sizes (M3-M16), our MOQ is 5,000 pieces per size. For larger diameters or custom designs, we can negotiate. We also offer sample orders (50-100 pcs) for qualification at a nominal cost.

Q4: How do you handle shipping for cap in the head socket screws to the USA or Europe?

We offer FOB, CIF, and DDP terms. Typical sea freight to US West Coast takes 18-22 days, to Europe (Rotterdam) 25-30 days. Express air freight is available for urgent orders. We handle all customs documentation and provide tracking.

Q5: Can you produce custom 3 head socket designs for my application?

Absolutely. Our OEM/ODM team can design and produce custom head with cap socket screws with specific drive types, head shapes, thread lengths, and coatings. Send us your drawing or sample, and we'll provide a prototype within 7 days.

Q6: What certifications do you provide with each shipment?

Every shipment includes Mill Test Reports (MTR), Certificate of Conformance (COC), heat treatment records, and dimensional inspection reports. We also provide third-party inspection reports upon request (SGS, TÜV, or Bureau Veritas).

Q7: Do you offer free samples of cap of head socket screws for testing?

Yes! We provide free samples (up to 20 pieces per size) for qualified buyers. You only pay shipping. This allows you to test our cap of head quality in your own application before committing to a bulk order.

Q8: What payment methods do you accept for international orders?

We accept T/T (wire transfer), L/C (Letter of Credit), and for established customers, net 30/60 terms. All payments are processed through our corporate bank accounts with full invoice documentation.