Hex Socket Screw Sizes & Hexagon Socket Head Cap Screw | Factory
Hex Socket Screw Sizes & Hexagon Socket Head Cap Screw – Factory Direct
Stop overpaying for standard & custom hexagon socket head cap screw dimensions – get ISO/ASME-certified fasteners at factory prices, with 10‑day lead times and full traceability.
📸 Handan Boen – 100,000 m² smart factory
Why most buyers get frustrated with hex socket screw suppliers
- ❌ Inconsistent dimensions – 22% of imported hexagon socket head cap screws fail on head height/flank angle (source: 2024 BIFMA report).
- ❌ Hidden costs – 34% higher total cost due to rework, delayed shipments, and minimum order quantities.
- ❌ Long lead times – average 45–60 days from Asian suppliers, killing your production schedule.
- ❌ No traceability – 1 in 3 buyers receive mixed grades (e.g., 8.8 vs 10.9) without certificate.
- ❌ Zero customization support – non-standard hex socket screw sizes for OEM projects are either rejected or priced at 3x.
- ❌ Communication barriers – 6+ emails just to confirm a thread pitch, causing 2–3 week delays.
📊 68% of procurement managers in our 2025 survey said they changed suppliers due to dimensional inconsistency and poor after-sales support.
🔍 Every batch is 100% dimension-checked
⚙️ Precision hexagon socket head cap screw – engineered for industrial buyers
At Handan Boen Fastener (est. 2010), we deliver ASME B18.3 / ISO 4762 compliant hex socket screws in all standard sizes from M1.6 to M64, plus custom dimensions. Our factory-direct model eliminates the 30–50% distributor markup.
- ✅ 100% dimensional traceability – CMM reports for every lot, free upon request.
- ✅ 10–15 day lead time for standard sizes; 20 days for custom.
- ✅ Alloy steel, stainless 304/316, 17-4PH, duplex, titanium – grades 8.8, 10.9, 12.9.
- ✅ OEM/ODM – non-standard hex socket screw sizes, drive types, and coatings (Zn-Ni, Dacromet, Xylan).
- ✅ ERP integration – EDI, SAP, or CSV export for seamless PO management.
🏭 Factory footprint: 100,000 m² | 30+ export countries | 12,000+ tons annual output
📐 Popular hex socket screw sizes
- M3 × 0.5 – 6 mm / 8 mm / 10 mm length
- M4 × 0.7 – 8 mm / 10 mm / 12 mm / 16 mm
- M5 × 0.8 – 10 mm / 12 mm / 16 mm / 20 mm
- M6 × 1.0 – 12 mm / 16 mm / 20 mm / 25 mm
- M8 × 1.25 – 16 mm / 20 mm / 25 mm / 30 mm
- M10 × 1.5 – 20 mm / 25 mm / 30 mm / 40 mm
- M12 × 1.75 – 25 mm / 30 mm / 40 mm / 50 mm
- M16 × 2.0 / M20 × 2.5 / M24 × 3.0 – custom lengths
🔧 Non-standard? We do it. Send your drawing.
🗂 Hexagon socket head cap screw dimensions – technical reference
Full compliance with ISO 4762 and ASME B18.3. All dimensions in mm (inches for #0–#12 sizes on request).
| Thread size | Pitch (mm) | Head Ø (max) | Head height (max) | Hex socket size (mm) | Yield strength (min) |
|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 3.0 | 2.5 | 640 MPa (10.9) |
| M4 | 0.7 | 7.0 | 4.0 | 3.0 | 640 MPa (10.9) |
| M5 | 0.8 | 8.5 | 5.0 | 4.0 | 640 MPa (10.9) |
| M6 | 1.0 | 10.0 | 6.0 | 5.0 | 640 MPa (10.9) |
| M8 | 1.25 | 13.0 | 8.0 | 6.0 | 640 MPa (10.9) |
| M10 | 1.5 | 16.0 | 10.0 | 8.0 | 640 MPa (10.9) |
| M12 | 1.75 | 18.0 | 12.0 | 10.0 | 640 MPa (10.9) |
| M16 | 2.0 | 24.0 | 16.0 | 14.0 | 640 MPa (10.9) |
🔬 Grade 12.9 available on request | Custom lengths up to 500 mm | Thread tolerance 6g / 6H
🏭 Where precision hexagon socket head cap screws are used
Automotive
Engine blocks, transmission, chassis
Agricultural machinery
Harvesters, tractors, tillers
Construction
Steel structures, formwork, bridges
Industrial machinery
Presses, conveyors, robots
Energy & renewables
Wind turbines, solar frames, battery racks
📋 Case study: A German agricultural OEM reduced fastener failure by 73% after switching to Boen’s 10.9 hex socket screws – read the full report.
💬 What our customers say
Real feedback from procurement and engineering leaders.
Procurement Lead, Italy
“We tested Boen’s M6 hexagon socket head cap screws against three Asian suppliers. Boen had 0.02 mm deviation – best in class. Now our standard supplier.”
Supply Chain Manager, UK
“Custom hex socket screw sizes used to take 8 weeks. Boen delivered in 14 days with full CMM report. Saved us £22k in downtime.”
Technical Director, Germany
“Their hexagon socket head cap screw dimensions match our drawings exactly. We’ve eliminated inspection failures. Highly recommended.”
❓ Frequently asked questions about hex socket screws
📌 What are the standard hex socket screw sizes you produce?
We cover M1.6 to M64 in coarse and fine pitch, plus #0–#12 inch sizes. Full table in the Tech Specs section above. Non-standard sizes are our specialty – just send your drawing.
📌 What is the difference between hex socket screw and hexagon socket head cap screw?
The terms are used interchangeably. Hexagon socket head cap screw is the official ASME/ISO name for a socket head cap screw (SHCS). Hex socket screw is a common trade name. Both refer to the same product: a threaded fastener with a cylindrical head and a hexagonal drive.
📌 Can you provide custom hexagon socket head cap screw dimensions?
Yes. We offer full OEM/ODM for non-standard head diameters, lengths, drive depths, and undercut geometries. Minimum order quantity: 2,000 pcs for custom sizes. Lead time: 16–20 days.
📌 What grades and materials are available?
Grades 8.8, 10.9, 12.9 in alloy steel; stainless 304, 316, 17-4PH; duplex; titanium; and brass. Coatings: black oxide, zinc-nickel, Dacromet, Xylan, and hot-dip galvanizing.
📌 How do you ensure quality and traceability?
Every batch is tested for hardness, tensile strength, and dimensional accuracy with a CMM. We provide a certificate of conformity (EN 10204 3.1) and material traceability reports free of charge.
📌 What are your shipping terms and lead times?
Standard sizes: 10–15 days ex-works. Custom: 16–20 days. We ship via FOB Tianjin, CIF to major ports, or DDP for high-volume contracts. Full logistics tracking via ERP portal.
📌 What is the minimum order quantity (MOQ)?
For standard hex socket screw sizes: 1,000 pcs per size. For custom dimensions: 2,000 pcs. Sample orders (50–200 pcs) are available at sample cost, refundable with first bulk order.
📌 Do you offer free samples for evaluation?
Yes. Qualified buyers can request free samples (up to 20 pcs per size) for technical evaluation. You pay only shipping. Request yours now.
✍️ Written by Zhang Wei – Senior Fastener Engineer, Handan Boen
Zhang Wei has 18 years of experience in cold heading and thread rolling, with 12 patents in fastener design. He leads Boen’s R&D team and has helped 40+ global OEMs optimize their hex socket screw specifications. He is a member of the Chinese Fastener Standards Committee.
⚡ Get your exact hexagon socket head cap screw dimensions – quoted in 4 hours
Send us your drawing or size list. We’ll reply with a firm price, lead time, and free sample offer within 24 hours.
📧 shuan@fastenboen.com | 📞 +86 15630072814 | 🕐 09:00–17:00 (GMT+8)
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