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العربية Dacromet coated bolts supplier
XZ Fastener supplies Dacromet coated bolts for buyers who need corrosion-resistant fastening without the thick thread build-up of hot dip galvanizing. Dacromet, often described as zinc flake coating, is commonly requested for automotive, machinery, outdoor equipment, solar brackets, and assemblies exposed to humidity or salt spray. Bolts can be supplied in carbon steel or alloy steel, with DIN, ISO, ASTM, ASME, or drawing-based dimensions according to order requirement. For a stable quotation, send size list, grade, coating color or thickness request, salt spray target if any, quantity, packaging, and inspection requirements.
Dacromet coating is often selected where corrosion resistance, thread fit, and lower hydrogen embrittlement risk must be considered together.
Quick Specs
What Buyers Should Know Before Sourcing Dacromet Coated Bolts
Dacromet coated bolts are usually chosen when buyers need corrosion resistance with better thread control than thick galvanized coatings. The coating is commonly used on carbon steel and alloy steel fasteners for equipment exposed to moisture, road conditions, outdoor storage, or salt spray requirements. It is important to confirm coating color, coating thickness range, friction expectation, and salt spray target before order confirmation.
XZ Fastener can review standard metric hex head bolts, custom bolts, and complete bolt-nut-washer sets with Dacromet or other zinc flake finishes. Buyers can also compare related options on the Dacromet coated fasteners page.
Procurement Notes
- Confirm whether the application requires neutral salt spray hours, coating thickness, or coefficient of friction control.
- Specify if bolts will be supplied alone or with matching nuts and washers in the same coating system.
- For high-strength bolts, discuss coating process and hydrogen embrittlement risk before production.
- Ask for sample approval when surface color, thread feel, or assembly torque is important.
Common Purchasing Descriptions
Buyers may describe Dacromet coated bolts by coating system, corrosion target, bolt standard, or application. XZ Fastener can quote individual bolt lines or broader fastener products packages according to project requirements.
- Dacromet coated hex bolts, carbon steel, metric and inch sizes
- Zinc flake coated bolts, Grade 8.8, Grade 10.9, or Grade 12.9
- Dacromet metric hex head bolts with matching nuts and washers
- Coated bolts for automotive brackets, solar mounting, outdoor machinery, and construction hardware
- Related purchasing terms: DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts
Detailed Specifications Table
| Item | Common Options | Buyer Confirmation Points |
|---|---|---|
| Product type | Hex bolts, flange bolts, carriage bolts, structural bolts, anchor bolts, custom bolts | Confirm head style, thread length, shank type, and mating parts. |
| Standards | DIN 931, DIN 933, ISO 4014, ISO 4017, ASTM, ASME, EN, JIS, or drawing | Send exact standard or drawing revision used in the purchase order. |
| Thread | Metric coarse, metric fine, UNC, UNF, or custom thread | Confirm pitch and tolerance because coating can affect assembly feel. |
| Size range | Metric and inch sizes can be reviewed according to order requirement | Provide diameter, length, pitch, thread length, and quantity per line item. |
| Material | Carbon steel, medium carbon steel, alloy steel | Confirm chemistry and mechanical requirement for high-load or safety-related applications. |
| Strength | 4.8, 8.8, 10.9, 12.9, ASTM grades, or drawing-specified grade | Match bolt grade with nut grade, washer hardness, and tightening method. |
| Coating | Dacromet, zinc flake, Geomet-type finishes, or custom coating system | Confirm color, salt spray target, thickness range, and friction requirement if specified. |
| Inspection | Dimension, thread gauge, coating appearance, hardness, tensile, salt spray when required | Inspection documents and sample approval should be agreed before production. |
Material and Grade Explanation
Dacromet coated bolts are often made from carbon steel or alloy steel because the coating helps improve corrosion performance while the base material provides mechanical strength. Grade 8.8 carbon steel hex bolts are common for machinery and construction hardware, while 10.9 and 12.9 grades are used where higher tensile strength is required.
For high-strength bolts, buyers should check whether the coating process is suitable for the grade and whether post-treatment, baking, or hydrogen embrittlement control is required. Dacromet is often considered when electroplated zinc is not preferred for high-strength fasteners, but the final choice should match the project standard and application environment.
Grade Selection Tips
- Use 4.8 or 8.8 for general fastening when the design allows.
- Use 10.9 or 12.9 only when mating parts and tightening conditions are suitable.
- For structural or dynamic loads, confirm the complete bolt-nut-washer assembly.
- Request relevant tests before production if the bolts are used in critical equipment.
Surface Finish Selection Guide
Dacromet / Zinc Flake
Dacromet is a zinc flake coating used when corrosion resistance, controlled coating build-up, and high-strength bolt compatibility must be considered. The broader fastener coating guide explains how it compares with other common finishes.
Zinc Plated and Black Oxide
Zinc plating is common for indoor or light-duty corrosion protection, while black oxide is mainly selected for dark appearance and controlled indoor use. These finishes are often used when cost, appearance, and thread fit are the main concerns.
Hot Dip Galvanized
Hot dip galvanizing provides a thicker zinc layer for outdoor steelwork but can affect thread fit more than zinc flake coatings. Buyers can compare options in the corrosion resistance comparison guide.
Manufacturing and Quality Control
Production usually includes wire or bar preparation, cutting, heading or forging, thread rolling, heat treatment when required, cleaning, coating preparation, Dacromet coating, curing, inspection, and packing. Key control points include dimensional accuracy before coating, thread fit after coating, coating coverage, surface appearance, hardness, and batch separation during packing.
Inspection can be arranged according to order requirement, including dimensional checks, go/no-go thread gauge testing, hardness testing, coating appearance review, thickness checks, and salt spray testing when specified. Buyers can also review coating inspection requirements and XZ Fastener’s quality control process before confirming inspection terms.
Applications
Typical Use Areas
- Automotive brackets, chassis parts, and equipment assemblies
- Outdoor machinery, agricultural equipment, and construction hardware
- Solar mounting systems, frames, clamps, and support structures
- Marine-adjacent equipment, road equipment, and humid storage environments
Assembly Considerations
- Confirm whether friction coefficient or torque-tension behavior is specified.
- Check nut and washer compatibility when bolts are supplied as an assembly.
- Use packaging that protects coated surfaces during long-distance shipment.
- Store coated fasteners in a dry area before installation to protect surface condition.
How to Get a Faster Quotation
Send a full RFQ with bolt type, standard, diameter, length, thread pitch, thread length, material grade, strength class, Dacromet coating requirement, salt spray target if any, quantity, packaging method, delivery destination, and inspection requirements. If the coating has a specified color, friction value, or thickness range, include that information in the purchase request.
For assemblies, send matching nut and washer details together with the bolt list. XZ Fastener can review finish compatibility, thread fit, grade matching, carton weight, pallet packing, and requested documents before quotation. For non-standard parts, drawings or samples are recommended.
FAQ
Can XZ Fastener supply Dacromet coated bolts with matching nuts and washers?
Yes. Dacromet coated bolts can be supplied with matching nuts, washers, or complete assemblies according to size, grade, coating, packaging, and inspection requirements.
What is the advantage of Dacromet coating for bolts?
Dacromet coating is commonly selected for corrosion resistance with controlled coating build-up. It is often considered for carbon steel or alloy steel bolts used in automotive, machinery, outdoor equipment, and solar applications.
Is Dacromet the same as hot dip galvanizing?
No. Hot dip galvanizing creates a thicker zinc coating, while Dacromet is a zinc flake coating system. The right choice depends on corrosion target, thread fit, application environment, and project specification.
Can high-strength bolts be supplied with Dacromet coating?
High-strength bolts can be reviewed with Dacromet coating. Buyers should confirm strength class, coating requirement, hydrogen embrittlement concerns, and inspection standards before production.
Can salt spray testing be arranged?
Salt spray testing can be arranged when required by the order. Buyers should specify the target hours, test standard, sample quantity, and whether a report is needed before shipment.
What information is needed for a Dacromet coated bolt quotation?
Please send the size list, standard, grade, coating requirement, quantity, packaging method, delivery destination, matching parts, and inspection requirements. Drawings are recommended for non-standard bolts.
Send Your Dacromet Coated Bolt RFQ
For a faster quotation, send your size list, Dacromet finish requirement, quantity, packaging method, matching nut and washer details, and inspection requirements. XZ Fastener can review standard bolts, coated assemblies, and custom fasteners according to your project or stock order plan.