Product Details
General Standard Hex Bolts are the most widely used fasteners in industrial and construction applications. With a six-sided head and fully threaded or partially threaded shank, they provide secure clamping force for assembly, repair, and structural connections.
At Yuanpai Fastener, we manufacture general standard hex bolts according to DIN 933, GB 5783, ISO 4017, and other international standards. Our bolts are produced with precision, tested for dimensional accuracy, and available in multiple grades, materials, and surface finishes.
Whether you need bulk supply for a construction project, OEM fasteners for machinery, or retail-ready packaging for hardware stores – we have the right hex bolt for you.
Sub-brands available: Qinggang, Jinlu 21, Changgu (for high-strength)
Key Features
Six-sided head design – Easy to tighten with standard wrenches or sockets
Full or partial thread – Choose according to your clamping depth requirements
Precise thread tolerance – 6g for external threads (ISO 965), smooth assembly with standard nuts
Uniform head dimensions – Consistent wrench engagement across batches
Multiple material & grade options – From mild steel to high-strength alloy
Various surface finishes – Plain (black), zinc plated (blue-white/yellow), hot-dip galvanized, Dacromet, color zinc, etc.
Strict quality control – Dimensional inspection, hardness test, thread go/no-go gauge
Technical Specifications
| Parameter | Details |
|---|---|
| Standards | DIN 933, DIN 931, GB 5783, GB 5782, ISO 4017, ISO 4014 |
| Thread size (M) | M4 – M64 (M6 – M36 in stock) |
| Length range | 8mm – 300mm (longer on request) |
| Thread pitch | Coarse (standard) and fine pitch available |
| Grades | 4.6, 4.8, 5.6, 8.8, 10.9 (12.9 via Changgu) |
| Materials | Mild steel (Q235), carbon steel (35#/45#), alloy steel (40Cr, 35CrMo, 42CrMo), stainless steel (on request) |
| Surface finishes | Plain (black oxide), zinc plated (blue-white/yellow), hot-dip galvanized (HDG), Dacromet, color zinc, mechanical zinc, phosphate |
| Thread tolerance | 6g (standard) |
| Packaging | 25kg carton, 25kg kraft paper bags, steel pallets, small retail boxes (Changheng sub-brand) |
Available Grades & Their Applications
| Grade | Tensile Strength (MPa) | Typical Application |
|---|---|---|
| 4.6 / 4.8 | 400 MPa | Light-duty assembly, furniture, non-critical structures, household applications |
| 8.8 | 800 MPa | General machinery, steel structures, automotive components, construction (most common) |
| 10.9 | 1000 MPa | Heavy machinery, high-load connections, wind power, mining equipment (via Changgu) |
For Grade 8.8 and above, heat treatment and strict quality control are applied. For Grade 10.9 and 12.9, please refer to our Changgu high-strength sub-brand.
Surface Finish Options & Benefits
| Finish | Appearance | Corrosion Resistance | Best Use |
|---|---|---|---|
| Plain (black) | Dark grey/black | Low (oil coating prevents short-term rust) | Indoor, dry environments, temporary assembly |
| Zinc plated (blue-white) | Bright silver-blue | Moderate (72–120 hrs salt spray) | General hardware, machinery, export finished goods |
| Zinc plated (yellow) | Golden yellow | Moderate to good | Automotive, decorative applications |
| Hot-dip galvanized (HDG) | Matte grey | High (500–1000+ hrs salt spray) | Outdoor, bridges, power towers, solar farms |
| Dacromet | Silver-grey | Very high (500–1000 hrs) | High-strength, hydrogen embrittlement-sensitive, eco-friendly |
| Color zinc | Yellow/blue/black glossy | Moderate | Furniture, visible assemblies, home appliances |
Related sub-brands: Wolf Warrior (HDG), Mingyang (Dacromet), Jin'an (blue-white zinc), Steel Screw (color zinc)
Which Sub-Brand Should You Choose?
| If you need... | Choose this sub-brand |
|---|---|
| Standard hex bolts at competitive price, large stock | Jinlu 21 |
| GB/DIN standard, general engineering use | Qinggang |
| High-strength (Grade 8.8/10.9/12.9) | Changgu |
| Hot-dip galvanized for outdoor anti-corrosion | Wolf Warrior |
| Blue-white zinc plating for export quality | Jin'an |
| Dacromet coating for hydrogen-free protection | Mingyang |
| Color zinc for decorative appearance | Steel Screw |
| Small packaging for retail and DIY | Changheng |
Applications
General standard hex bolts are used across almost every industry. Our customers purchase them for:
Construction & Building – Steel frame connections, concrete formwork, structural joints
Machinery Manufacturing – Equipment assembly, motor mounts, gearbox fastening
Automotive – Chassis components, engine brackets, suspension systems (Grade 8.8/10.9)
Bridges & Infrastructure – Highway guardrails, rail fastening, tower connections
Solar Energy – Mounting structures, panel frames (often with HDG or Dacromet)
Hardware Retail – Bulk or small-pack sales to end users
Maintenance & Repair – General replacement bolts for field service
Quality Assurance
All our general standard hex bolts are produced and tested under our ISO 9001, ISO 14001, and ISO 45001 certified management systems.
Inspection includes:
Dimensional check (head height, width across flats, thread length)
Thread gauge testing (go/no-go)
Hardness test (Rockwell or Brinell)
Tensile test for Grade 8.8 and above
Coating thickness measurement (for plated finishes)
Salt spray test (upon request)
We can provide EN 10204 Type 3.1 material certificates, batch test reports, and third-party inspection (SGS, BV, etc.) upon request.
Packaging & Delivery
Standard export packaging:
Small cartons (25kg) → steel pallet → stretch-wrapped → container loading
Option: Kraft paper bags + pallets
Option: Small retail boxes with label (Changheng sub-brand)
Label information: Product spec, grade, size, quantity, heat number (if required), country of origin
Delivery:
Stock items: 7–15 days
Custom production (non-stock size/grade/finish): 20–30 days
Daily output capacity: 800 tons → large orders welcome
Ordering Information
To request a quote, please provide the following:
Standard (e.g., DIN 933, GB 5783, ISO 4017)
Size (e.g., M10 × 40mm)
Grade (e.g., 4.8, 8.8, 10.9)
Finish (e.g., zinc plated blue-white, HDG, plain)
Quantity (pieces or tons)
Packaging requirement (bulk carton, small box, pallet)
Example: *DIN 933 hex bolt, M12 × 50mm, Grade 8.8, hot-dip galvanized, 20 tons, bulk pallet packaging.*
Why Buy General Standard Hex Bolts from Yuanpai Fastener?
✅ Massive inventory – 70,000 tons in stock ensures fast shipment
✅ High daily output – 800 tons/day, no capacity issues
✅ Multi-brand specialization – Right coating and quality for every need
✅ Certified quality – ISO 9001, ISO 14001, ISO 45001
✅ Full traceability – Heat numbers and test reports available
✅ One-stop sourcing – Bolts, nuts, washers, screws – all from one supplier
✅ Export experience – Shipping to USA, Europe, Southeast Asia, Middle East, Africa
Request a Quote
Contact our sales team for competitive pricing and technical support.
📧 Email: yuanpaifastener@gmail.com
📞 Phone / WhatsApp: +86 18531009807 | +86 18531007875
Yuanpai Manufacturing – Fasten the World. From Source to Global.