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العربية DIN 6921 hex flange bolts exporter
XZ Fastener exports DIN 6921 hex flange bolts for international buyers who need metric flange head fasteners with clear specifications, reliable packing, and practical document support. The integrated flange provides a wider bearing surface and can simplify assembly where the joint design allows it. These bolts are used in machinery, automotive brackets, equipment frames, metal enclosures, guard assemblies, and OEM production. Orders can be discussed by size list, material, grade, finish, packaging, and inspection requirements. Buyers may also review related industrial bolts and complete fastener products for mixed export purchasing plans.
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Quick Specs
| Standard | DIN 6921 hex flange bolts. Related ISO or drawing-controlled requirements can be reviewed when interchangeability is critical. |
|---|---|
| Strength | Common metric property classes include 8.8, 10.9, and 12.9 according to order requirement; stainless steel A2-70 or A4-70 available upon request. |
| Material | Carbon steel, alloy steel, stainless steel 304/A2, stainless steel 316/A4, or specified material according to application requirement. |
| Finish | Plain, black oxide, zinc plated, hot dip galvanized where suitable, zinc flake, nickel plated, or passivated stainless steel. |
| Application | Machinery, automotive components, steel brackets, frames, equipment housings, guard assemblies, maintenance stock, and OEM production. |
What Buyers Should Know Before Sourcing DIN 6921 Hex Flange Bolts
DIN 6921 hex flange bolts combine a hex head and a built-in flange. The flange can provide a wider bearing area than a standard hex head, which may reduce the need for a separate washer in suitable joints. However, the buyer should still check hole size, bearing surface, coating condition, and tightening method.
For export orders, product descriptions should match across the quotation, invoice, packing list, carton labels, and inspection documents. If the same shipment includes several metric fastener standards, this DIN and ISO fastener standards guide can help buyers separate standard references, mechanical grades, and finish requirements correctly.
Common Purchasing Descriptions
A complete description helps prevent wrong production, mixed packing, and document disputes at import clearance or warehouse receiving.
| Incomplete Description | Better Export Purchasing Description |
|---|---|
| M8 flange bolt | DIN 6921 hex flange bolt, M8 x 25, Class 8.8, zinc plated, serrated flange, export carton packing |
| Black flange bolt | DIN 6921 hex flange bolt, M10 x 30, Class 10.9, black oxide, non-serrated flange, inspection report upon request |
| Stainless flange bolt | DIN 6921 hex flange bolt, M6 x 20, A2-70 stainless steel, passivated, small box packing |
| Custom flange bolt | Hex flange bolt made to drawing, specified flange diameter, material, finish, tolerance, and buyer label |
Many buyers purchase DIN 6921 together with DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts. These items should be quoted and packed separately because their head forms, bearing areas, and applications are different.
Detailed Specifications Table
| Specification Item | Typical Export Requirement | Buyer Checkpoint |
|---|---|---|
| Product type | Hex flange bolt | Confirm DIN 6921 or drawing-controlled flange bolt requirement. |
| Thread system | Metric thread, commonly coarse pitch | State fine pitch clearly if required by machinery or automotive assemblies. |
| Common size range | M5, M6, M8, M10, M12, M14, M16, and larger sizes upon request | Send a size list with quantity for each diameter and length. |
| Flange type | Serrated or non-serrated flange depending on application | Check whether serration is acceptable on coated, painted, aluminum, or soft surfaces. |
| Thread length | Full or partial thread according to size and order requirement | Confirm thread engagement, grip length, and mating nut or tapped hole. |
| Strength class | 8.8, 10.9, 12.9, A2-70, A4-70, or order-specific grade | Match strength to load, tightening method, and application safety requirement. |
| Surface finish | Zinc plated, black oxide, zinc flake, plain, hot dip galvanized where suitable, or stainless passivation | Confirm corrosion exposure, thread fit, and coating appearance requirements. |
| Export documents | Packing list, inspection report, material certificate, coating report, or Certificate of Origin available upon request | Define document requirements before production and shipment. |
For buyers comparing related standard products, the standard fasteners page provides a wider view of bolts, screws, nuts, washers, anchors, and threaded components available for industrial purchasing.
Material and Grade Explanation
Carbon Steel and Alloy Steel
Carbon steel and alloy steel DIN 6921 hex flange bolts are commonly used in machinery, automotive brackets, equipment frames, and general industrial assemblies. Property Class 8.8 is common for general high-strength use, while 10.9 and 12.9 may be selected for higher-load applications.
For load-sensitive assemblies, compare the requirement with related high-strength fasteners. The flange design affects bearing area, but bolt grade, thread engagement, and tightening method still control joint performance.
Stainless Steel
A2 stainless steel flange bolts are suitable for many indoor and mild outdoor applications. A4 stainless steel is more suitable for coastal, marine, chemical, or high-humidity environments. Stainless flange bolts should be matched with compatible nuts or tapped holes.
Stainless steel threads can gall during installation, especially under high speed or dry assembly. Buyers should confirm lubrication and torque practice when stainless bolts are used in repeated assembly.
Surface Finish Selection Guide
Surface finish affects corrosion resistance, appearance, thread fit, friction behavior, and storage life. For export orders, finish should also be described consistently in documents and labels.
| Finish | Suitable Use | Export Buyer Note |
|---|---|---|
| Zinc plated | General industrial use and light corrosion protection | Common for machinery and stock supply. Confirm color, coating thickness, and salt spray expectation. |
| Black oxide | Indoor machinery and equipment assemblies | Clean dark appearance; limited corrosion resistance unless protected by oil or controlled storage. |
| Zinc flake | Outdoor equipment and higher corrosion resistance applications | Useful where corrosion protection and controlled coating thickness are both important. |
| Hot dip galvanized | Outdoor steel structures where suitable for the thread and size | Check coating thickness, thread fit, and matching nut requirements before approval. |
| Stainless passivation | A2 or A4 stainless steel flange bolts | Recommended when corrosion resistance and clean surface condition are important. |
For corrosion-sensitive applications, buyers can review XZ Fastener’s coated fasteners before confirming the final finish.
Manufacturing and Quality Control
DIN 6921 hex flange bolts require control of head forming, flange geometry, thread quality, strength, coating, and packing. For export orders, label accuracy and document consistency are also important because the same shipment may contain multiple sizes and finishes.
Material grade, wire or bar diameter, heat number, and batch separation should be confirmed before forming and threading.
Across-flat size, head height, flange diameter, flange thickness, serration condition, and bearing surface should be checked against the order requirement.
Carton labels, package quantity, net weight, gross weight, pallet marks, and packing list details should match the shipment documents.
For special flange diameter, non-standard serration, modified thread length, or private-label packing, XZ Fastener can discuss custom fasteners based on drawings, samples, or technical descriptions.
Applications
DIN 6921 hex flange bolts are used where a bolt head with a wider bearing surface is useful. They are common in production lines, repair kits, and maintenance stock because they can simplify assembly when the joint design allows it.
| Application Area | Why DIN 6921 Is Used | Selection Reminder |
|---|---|---|
| Machinery and equipment frames | Integrated flange supports faster assembly and wider bearing contact | Confirm flange clearance and tightening method. |
| Automotive and vehicle brackets | Flange head can reduce washer handling in suitable joints | Check grade, coating, and vibration conditions. |
| Electrical and metal enclosures | Clean assembly with stable contact surface | Choose finish according to indoor or outdoor exposure. |
| Guard assemblies and brackets | Wider bearing surface helps distribute load on plates and brackets | Check whether serrated flange is acceptable on coated surfaces. |
| OEM and distributor export orders | Common metric sizes support repeat consumption | Use clear labels by size, finish, material, grade, and batch. |
If the order requires modified flange dimensions, private-label packing, or drawing-based production, the customized service process can help define requirements before manufacturing.
How to Get a Faster Quotation
A complete export inquiry helps reduce follow-up time and allows the supplier to check production, packing, and document requirements at the same time.
- Confirm standard: DIN 6921 or drawing-controlled hex flange bolt.
- Send size list: diameter, length, thread pitch, flange type, and quantity for each line.
- State material and grade: carbon steel, alloy steel, Class 8.8, 10.9, 12.9, A2 stainless, A4 stainless, or specified material.
- Define finish: zinc plated, black oxide, zinc flake, hot dip galvanized where suitable, passivated stainless, or other coating.
- Confirm packaging: bulk carton, small box, plastic bag, buyer label, barcode, pallet, or line-side packing.
- List inspection requirements: dimensional report, material certificate, coating report, packing list details, or Certificate of Origin.
- Share destination country, destination port, and preferred trade term if shipment support is required.
For current quotation support, contact XZ Fastener with your size list, finish, quantity, packaging, and inspection requirements.
FAQ
What is DIN 6921 used for?
DIN 6921 hex flange bolts are used in machinery, automotive brackets, equipment frames, enclosures, guard assemblies, and other applications where an integrated flange head can provide a wider bearing surface.
Can DIN 6921 flange bolts replace hex bolts with washers?
Sometimes, but not always. The flange can distribute load, but the joint design, bearing surface, hole size, coating, and tightening method should be checked before replacing a separate washer arrangement.
Are DIN 6921 flange bolts serrated?
DIN 6921 flange bolts may be requested with serrated or non-serrated flange depending on the buyer requirement. Serration can affect locking behavior and surface damage, so it should be confirmed clearly.
What materials and grades can be supplied?
Common options include carbon steel, alloy steel, stainless steel A2, and stainless steel A4. Metric property classes such as 8.8, 10.9, and 12.9 can be discussed according to application and order requirement.
Which finishes are common for DIN 6921 hex flange bolts?
Zinc plated, black oxide, zinc flake, plain, hot dip galvanized where suitable, and stainless steel passivation are common options. The finish should match corrosion exposure, thread fit, and appearance requirements.
What information is needed for an accurate export quotation?
Send the standard, size list, thread pitch, flange type, material, grade, finish, quantity, packing method, destination country, and inspection requirements. A drawing is recommended for special flange dimensions or non-standard serration.
Send Your DIN 6921 Export Inquiry
For an accurate quotation, send your size list, finish, quantity, packaging, and inspection requirements. If the bolt is used in a load-sensitive or surface-sensitive assembly, include the drawing or application note with the inquiry.
- Size list: diameter, length, thread pitch, flange type, and quantity
- Material and grade: carbon steel, alloy steel, Class 8.8, 10.9, 12.9, A2, A4, or specified material
- Finish: zinc plated, black oxide, zinc flake, hot dip galvanized where suitable, passivated stainless, or other requirement
- Packaging: small box, bulk carton, bag, buyer label, barcode label, pallet, or line-side packing
- Inspection: dimensional report, material certificate, coating report, Certificate of Origin, or project documents