Industrial Black Finish Fastener Supply
black zinc plated fasteners manufacturer
XZ Fastener manufactures and supplies black zinc plated fasteners for B2B buyers who need dark appearance, controlled dimensions, and practical corrosion protection for assembled products. The range can include screws, bolts, nuts, washers, studs, and made-to-drawing parts according to order requirement. Black zinc plating is often selected for hardware kits, electrical enclosures, machinery covers, furniture fittings, automotive accessories, and visible assemblies where a clean black finish matters. Buyers can review related fastener products and send drawings, size lists, finish targets, quantity, packaging, and inspection requirements for a practical quotation.
Quick Specs
What Buyers Should Know Before Sourcing Black Zinc Plated Fasteners
Black zinc plating is different from black oxide, black phosphate, and painted finishes. It uses a zinc coating with black passivation to provide a dark appearance plus zinc-based corrosion protection. For accurate production, buyers should define base material, grade, thread standard, dimensional tolerance, coating thickness, passivation color, salt spray target, and whether sealing treatment is required.
If your project includes non-standard dimensions, mixed product types, or special packing, XZ Fastener can review custom fasteners based on drawings, samples, or an assembly requirement. Clear drawings help confirm whether the part should be machined, cold formed, stamped, threaded, or assembled with washers and nuts.
Important RFQ Details
- Fastener type: bolt, screw, nut, washer, stud, anchor, clamp, pin, or custom part.
- Standard or drawing: DIN, ISO, ANSI, JIS, GB, or buyer-specific design.
- Material and grade: carbon steel, alloy steel, stainless steel, class 8.8, 10.9, 12.9, or other requirement.
- Black zinc specification: coating thickness, passivation, sealing, appearance sample, and corrosion target.
- Packing: bulk carton, inner box, polybag, kit packing, pallet, label, and shipping mark.
Common Purchasing Descriptions
Buyers may describe these parts as black zinc plated bolts, black zinc screws, black zinc nuts, black zinc washers, black passivated fasteners, black zinc coated hardware, black electroplated fasteners, or dark zinc plated assembly parts. If the same project also includes DIN 933 full thread hex bolts, metric hex head bolts, matching nuts, and washers, each item should be listed separately with standard, size, grade, and finish.
Black zinc is often requested for appearance consistency across visible assemblies. However, it should not be mixed up with black oxide DIN 933 bolts, which use a different surface treatment. If corrosion resistance is the priority, the finish selection should be reviewed carefully before bulk ordering.
Detailed Specifications Table
| Specification Item | Common Options | Buyer Notes |
|---|---|---|
| Gama de productos | Hex bolts, socket screws, machine screws, self tapping screws, nuts, washers, studs, anchors, custom fasteners | Mixed fastener orders can be quoted when the size list and finish requirement are clear. |
| Estándares | DIN, ISO, ANSI, ASME, ASTM, JIS, GB, or made-to-drawing | Provide the exact standard number or drawing revision to avoid dimensional mismatch. |
| Tipo de hilo | Metric coarse, metric fine, UNC, UNF, self tapping, self drilling, custom thread | Thread fit should be checked after plating, especially for small threads and high coating thickness. |
| Material | Low carbon steel, medium carbon steel, alloy steel, stainless steel, brass, or other material upon request | Material choice affects strength, forming method, heat treatment, coating behavior, and cost. |
| Fuerza | Class 4.8, 8.8, 10.9, 12.9, nut class 8/10/12, washer hardness, custom hardness | High strength electroplated parts may require additional risk review and post-plating baking. |
| Finish | Black zinc plated, white zinc, yellow zinc, black oxide, phosphate, hot dip galvanized, zinc flake | Finish should be selected according to appearance, corrosion exposure, thread fit, and assembly requirements. |
| Inspection | Dimension, thread gauge, hardness, coating thickness, appearance, packing count, salt spray test if required | Inspection requirements should be stated before production and confirmed in the purchase order. |
| Packing | Bulk carton, small box, polybag, kit packing, wooden pallet, export carton, custom label | Specify carton weight limit, barcode, label language, and moisture protection for long-distance shipment. |
For bolt-heavy orders, buyers often compare black zinc plated fasteners with zinc plated DIN 933 bolts when appearance, corrosion resistance, and unit cost must be balanced.
Material and Grade Explanation
Carbon Steel and Alloy Steel
Carbon steel is commonly used for commercial screws, nuts, washers, and general-purpose bolts. Medium carbon steel and alloy steel are selected when higher tensile strength, heat treatment, or fatigue resistance is required. For example, Grade 8.8 carbon steel hex bolts should be quoted with the correct standard, thread length, coating, and inspection requirement.
High Strength Coating Considerations
Electroplating high strength fasteners requires attention to hydrogen embrittlement risk, especially for hardened bolts and screws. Buyers should state grade, hardness, coating thickness, baking requirement, and final application conditions. For critical parts, sample testing and assembly verification are recommended before mass production.
Surface Finish Selection Guide
Black zinc plated fasteners are chosen when the buyer needs a dark finish with zinc-based protection. The final appearance may vary slightly by material, plating thickness, passivation chemistry, sealing treatment, and part geometry. For visible hardware, buyers should confirm an approved sample before bulk production.
| Finish | Typical Use | Purchasing Consideration |
|---|---|---|
| Black Zinc Plated | Visible hardware, electrical cabinets, furniture fittings, automotive accessories, machinery covers | Combines black appearance with zinc coating; define color sample, coating thickness, and salt spray target. |
| Black Oxide | Tooling, machinery parts, indoor fasteners where dark appearance is needed | Not the same as black zinc; corrosion resistance depends heavily on oiling and application environment. |
| White or Blue Zinc | General hardware, appliances, electrical parts, indoor assemblies | Common finish when a bright silver-blue appearance is acceptable. |
| Yellow Zinc | Hardware kits, repair parts, and industrial assemblies requiring yellow chromate appearance | Confirm accepted passivation chemistry and market requirements before ordering. |
| Hot Dip Galvanized | Outdoor construction, structural bolting, guardrails, and heavier corrosion exposure | hot dip galvanized DIN 933 bolts are normally quoted separately because coating thickness and thread fit differ from electroplated parts. |
If corrosion resistance, color uniformity, or torque behavior is critical, confirm finish requirements through samples before placing a full production order.
Manufacturing and Quality Control
Manufacturing routes depend on the part type. Bolts and screws may be cold headed and thread rolled; washers may be stamped; nuts may be formed and tapped; custom parts may require machining or secondary processing. After forming and heat treatment, black zinc plating is applied according to the finish requirement, followed by inspection and packing.
Common checks include material confirmation, dimensional inspection, thread gauge testing, hardness testing when required, coating appearance, coating thickness, and packing count. Buyers can review XZ Fastener’s fastener quality control guidance to understand typical inspection points from raw material to packing.
Inspection Points for Black Zinc Orders
- Thread fit after plating, especially on small screws, nuts, and fine threads.
- Color consistency between bolts, nuts, washers, and screws in the same kit.
- Coverage inside recesses, under heads, and around threaded areas.
- Surface defects such as peeling, stains, white rust, heavy marks, or rough plating.
- Carton label, quantity count, pallet condition, and moisture protection for export shipment.
Aplicaciones
Industrial Assembly
- Machinery covers, sheet metal housings, control cabinets, and equipment frames.
- Automotive accessories, motorcycle parts, brackets, clamps, and repair hardware.
- Furniture fittings, display racks, lighting fixtures, consumer equipment, and appliance parts.
- Hardware kits requiring consistent dark appearance across screws, nuts, washers, and bolts.
Distribution and Project Supply
- Bulk packed black zinc fasteners for wholesalers, importers, and repacking operations.
- Mixed size shipments with unified labels, carton marks, and pallet packing.
- Project fastener lists requiring metric hex head bolts, washers, nuts, screws, and custom parts.
- Repeat orders where finish consistency and packing stability are important.
How to Get a Faster Quotation
To quote black zinc plated fasteners accurately, XZ Fastener needs a clear product list with size, standard, material, grade, finish, quantity, packaging, and inspection requirements. If drawings are available, include the drawing revision, tolerance, surface finish note, and any assembly test requirement. If samples are available, photos and measurements can help identify the correct production method.
- Send a size list with product name, standard, diameter, length, thread, and quantity per item.
- Confirm material and grade, such as carbon steel, alloy steel, stainless steel, class 8.8, 10.9, or 12.9.
- State black zinc plating requirements, including coating thickness, passivation, sealing, color sample, and salt spray target.
- Define packaging: bulk carton, small box, polybag, kit packing, pallet, label, barcode, and shipping mark.
- List inspection requirements, such as dimensional report, thread gauge, hardness, coating thickness, packing photos, or shipment documents.
Preguntas frecuentes
Is black zinc plating the same as black oxide?
No. Black zinc plating uses zinc coating with black passivation, while black oxide is a different surface conversion process. Black zinc is often selected when buyers need dark appearance with zinc-based corrosion protection.
Can black zinc plated fasteners be supplied as mixed bolts, nuts, screws, and washers?
Yes. Mixed fastener orders can be supplied according to the buyer’s size list and packing requirement. Each item should include standard, size, material, grade, finish, and quantity.
What should buyers confirm before ordering black zinc plated fasteners in bulk?
Buyers should confirm base material, strength grade, drawing or standard, thread type, black zinc finish requirement, coating thickness, salt spray target, packaging, and inspection documents needed with shipment.
Can XZ Fastener match a black zinc color sample?
A color sample or approved reference can be reviewed before production. Because black zinc appearance may vary by material, geometry, and process conditions, sample confirmation is recommended for visible parts.
Are black zinc plated high strength bolts suitable for all applications?
Not always. High strength electroplated fasteners may require hydrogen embrittlement risk review and post-plating baking. Buyers should state grade, hardness, application, and testing requirements before ordering.
What packing options are available for black zinc plated fasteners?
Common options include bulk cartons, small boxes, polybags, kit packing, customer labels, barcode labels, export cartons, and pallet packing. Packing can be arranged according to order requirement.
Send Your Black Zinc Fastener RFQ
For a faster quotation, please contact XZ Fastener with your size list, finish, quantity, packaging, and inspection requirements. Drawings, samples, approved color references, destination port, and delivery terms will help the team confirm production feasibility and prepare a clearer offer.
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