XZ Fastener | Dacromet Coated Flange Fasteners
dacromet flange bolts supplier China
XZ Fastener supplies Dacromet flange bolts from China for automotive, machinery, construction steelwork, equipment assembly, and outdoor fastening projects. Flange bolts combine a hex drive head with an integrated washer face, helping distribute load and simplify assembly where separate washers are not preferred. Dacromet coating is often selected for corrosion resistance and lower hydrogen embrittlement concern compared with many electroplated finishes. Sizes, grades, serrated or non-serrated flange styles, coating thickness, packing, and inspection documents can be arranged according to drawing or order requirement.
Quick Specs
What Buyers Should Know Before Sourcing Dacromet Flange Bolts
Dacromet flange bolts should be purchased with clear information on flange diameter, bearing surface type, thread pitch, thread length, head dimensions, strength class, coating requirement, and mating part design. Serrated flange bolts can provide extra resistance to loosening, while non-serrated flange bolts are often preferred when the mating surface must not be marked. For a wider comparison of flange bolt use cases, buyers can review XZ Fastener’s flange bolt buying considerations.
Because the flange works as an integrated washer face, the under-head bearing surface should match the assembly requirement. Buyers should confirm whether the bolt is used against steel, coated parts, aluminum, slotted holes, or a bracket surface. For project-based supply, XZ Fastener can help compare standard fastener products with drawing-based flange bolt requirements.
Procurement Checks
- Confirm DIN, ISO, IFI, or drawing-based dimensional requirement.
- Specify serrated or non-serrated flange face before quotation.
- Define strength class, material, and heat treatment requirement.
- State Dacromet coating thickness, color tone, and corrosion test expectation.
- Confirm packing method, label format, carton weight, and inspection documents.
Common Purchasing Descriptions
International buyers may describe the same item as Dacromet flange bolts, zinc flake flange bolts, Dacromet coated hex flange bolts, serrated flange bolts, non-serrated flange bolts, high tensile flange bolts, automotive flange bolts, or custom flange bolts supplied from China. For buyers combining several bolt lines in one shipment, XZ Fastener also supplies related DIN 933 coated hex bolt items, including 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.
Detailed Specifications Table
| Предмет | Typical Options | Buyer Notes |
|---|---|---|
| Тип продукта | Dacromet flange bolts, hex flange bolts, serrated flange bolts, non-serrated flange bolts | Confirm whether the flange face should lock into the mating surface or protect it. |
| Стандарт | DIN 6921, ISO 4162, EN 1665, IFI, or custom drawing | Send the exact standard version or drawing when tolerance is important. |
| Thread Size | M5 to M24 and custom metric sizes; inch sizes available upon request | Confirm pitch, thread length, tolerance, and thread fit after coating. |
| Strength Class | 4.8, 8.8, 10.9, 12.9, or project-specific requirement | High tensile grades should match the assembly load and safety requirement. |
| Материал | Carbon steel, medium carbon steel, alloy steel, 35CrMo, 40Cr, or equivalent | Material can be selected according to strength, forming process, and cost target. |
| Обработка поверхности | Dacromet zinc-aluminum flake coating; Geomet, zinc, black oxide, and HDG available for comparison | State coating thickness, friction requirement, salt spray expectation, and color preference. |
| Inspection | Dimensional check, thread gauge, hardness, tensile test, coating thickness, visual check | Inspection reports can be supplied according to order requirement. |
| Packing | Bulk carton, small box, pallet, label, barcode, or buyer-specified export packing | Provide carton weight limits and label format before quotation when needed. |
Material and Grade Explanation
Flange bolts are frequently used where assembly speed, bearing surface control, and vibration resistance matter. Carbon steel can be used for lower or moderate duty fastening, while medium carbon steel and alloy steel are often selected for grade 8.8, 10.9, and 12.9 flange bolts. The correct choice depends on clamp load, mating material, service environment, and whether the bolt is used in automotive, structural, or machinery applications.
For high tensile flange bolts, heat treatment and thread quality should be controlled carefully. Buyers should state the required grade, test method, and whether the flange face must be serrated or smooth. For assemblies exposed to weather, coating performance should be discussed together with grade and torque requirements.
Surface Finish Selection Guide
Dacromet is a zinc-aluminum flake coating often used when buyers need corrosion resistance on high strength fasteners. It is not an electrolytic coating, which makes it a practical option for many high tensile bolt projects. Buyers comparing finishes can review XZ Fastener’s Dacromet coated bolts information and the fastener coating guide before confirming the specification.
Surface finish should be selected with the whole assembly in mind. A flange bolt may contact painted steel, galvanized steel, aluminum, or another coated component. To avoid assembly issues, confirm coating thickness, friction coefficient, thread fit, storage conditions, and corrosion test requirement before placing the order.
Manufacturing and Quality Control
Manufacturing Focus
- Raw material review according to grade and order requirement.
- Cold forming or hot forging route depending on size, flange diameter, and head geometry.
- Thread rolling with attention to pitch, tolerance, and coating allowance.
- Heat treatment for high tensile grades where required by the drawing or standard.
- Dacromet coating arranged according to required coating performance and appearance.
Quality Control Items
- Dimensional checks for head, flange diameter, thread length, shank, and overall length.
- Go/no-go thread gauge inspection before and after coating when required.
- Hardness and mechanical property testing according to order requirement.
- Coating thickness, adhesion, appearance, and corrosion test arrangement when specified.
- Export packing verification, label check, and batch identification.
For inspection planning, buyers can use the fastener quality inspection checklist before sending an RFQ.
Приложения
Dacromet flange bolts are used in automotive brackets, chassis components, machinery frames, outdoor equipment, construction connections, guardrail systems, agricultural machinery, and general industrial assemblies. The integrated flange helps distribute pressure under the head and can reduce the need for a separate washer in suitable designs. Serrated flange bolts are often selected for vibration-prone assemblies, while non-serrated flange bolts are used where the surface should remain less marked.
Typical Markets
- Automotive and truck component assembly
- Machinery and equipment production
- Outdoor steel structures and brackets
- Agricultural and construction machinery
Common Order Concerns
- Correct flange diameter and under-head bearing surface
- Corrosion resistance for outdoor use
- Thread fit after Dacromet coating
- Packing labels for warehouse and batch traceability
How to Get a Faster Quotation
To quote accurately, please provide the standard or drawing, thread size, bolt length, flange diameter, serrated or non-serrated face, strength class, Dacromet coating requirement, order quantity, packing method, destination country, and inspection documents needed. If the bolt is used with a matching nut, bracket, or slotted hole, include the mating part details so bearing surface and thread fit can be reviewed before production.
For direct purchasing support, send the project details through the XZ Fastener request a quote page.
Часто задаваемые вопросы
Can XZ Fastener supply Dacromet flange bolts from China according to drawing?
Yes. Dacromet flange bolts can be supplied according to drawing, sample, or detailed specification. Please provide thread size, length, flange diameter, serrated or non-serrated face, strength class, coating requirement, quantity, and packing details.
What is the difference between serrated and non-serrated flange bolts?
Serrated flange bolts have teeth under the flange to improve resistance to loosening, while non-serrated flange bolts have a smoother bearing face that is usually better when the mating surface should not be marked.
Is Dacromet suitable for grade 10.9 flange bolts?
Dacromet is often used on high tensile fasteners because it is a non-electrolytic zinc-aluminum flake coating. Final suitability depends on the grade, coating specification, friction requirement, and service environment.
Can coating thickness and salt spray test requirements be specified?
Yes. Coating thickness, corrosion test expectation, color tone, and related inspection requirements can be discussed before order confirmation. These requirements should be stated clearly in the RFQ or drawing notes.
Can Dacromet flange bolts be packed for bulk export orders?
Yes. Bulk carton, small box, pallet, label, barcode, and buyer-specific export packing can be arranged according to order requirement. Please provide carton weight limits and label format if required.
Can XZ Fastener supply matching nuts or washers with flange bolts?
Matching nuts, washers, hex bolts, threaded rods, and other coated fasteners can be discussed as part of one sourcing project. Mating finish and thread fit should be confirmed together when parts are assembled together.
Send Your Dacromet Flange Bolt Inquiry
For a practical quotation, send your size list, drawing or sample photo, finish requirement, quantity, packaging method, and inspection requirements. XZ Fastener will review the details and respond with available supply options according to your order requirement.
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