Fastener Coating and Packaging Services

Fastener Coating, Packaging & More

TUHU Fasteners delivers more than just premium bolts and nuts. Our value-added fasteners services include protective coatings (zinc plating, hot-dip galvanizing, Teflon), specialized packaging (wooden cases, steel pails), and third-party testing—each tailored to ensure strength and consistency. Contact us at sales@tuhufasteners.com or Request a Quote. We’re here to help you find the perfect fastener solution for your project needs.

Quick Navigation

Fastener Coating

Fastener Packaging

In-House Testing

MTC & Inspection Reports

Fastener Coating Options

TUHU Fasteners offers corrosion-resistant coatings including zinc plating, hot-dip galvanizing, black oxide, and stainless steel. These protective layers enhance durability and help fasteners perform reliably in harsh industrial environments.

Zinc Plating

A thin zinc layer applied through electroplating, providing moderate corrosion resistance.

✅ Advantages: Cost-effective, smooth finish, suitable for indoor and dry environments.
✅ Common Applications: General hardware, construction, household items, automotive components.

Black Oxide

A chemical oxidation process creates a thin black oxide layer that offers limited corrosion resistance and reduced glare.

✅ Advantages: Improved wear resistance, lower friction, retains dimensional accuracy.
✅ Common Applications: Firearms, automotive components, tools, aerospace fasteners.

Plain (Uncoated Finish)

No protective coating, leaving the fastener in its raw metal state, which may be prone to oxidation and corrosion.

✅ Advantages: Cost-effective, suitable for welding, additional plating, or temporary applications.
✅ Common Applications: Secondary processing, indoor dry environments, short-term projects.

Teflon Coating

A PTFE (Polytetrafluoroethylene) coating that reduces friction, enhances chemical resistance, and withstands high temperatures.

✅ Advantages: Non-stick, smooth finish, anti-corrosion.
✅ Common Applications: Chemical processing, automotive, marine, food-grade fasteners.

Zn-Ni & Magni Coating

• Zn-Ni (Zinc-Nickel Coating): A zinc-nickel alloy layer with superior corrosion resistance and better adhesion than traditional zinc coatings.

• Magni Coating: A multi-layer corrosion-resistant system commonly used in high-stress environments.

✅ Advantages: Enhanced corrosion protection, chemical resistance, high durability.
✅ Common Applications: Aerospace, automotive, military, industrial machinery.

Hot-Dip Galvanizing (HDG)

The fastener is submerged in molten zinc, forming a thicker zinc coating (≥50μm) for enhanced corrosion resistance.

✅ Advantages: Long-lasting protection, withstands harsh weather conditions, ideal for outdoor use.
✅ Common Applications: Bridges, steel structures, infrastructure, marine equipment.

Stainless Steel

Naturally corrosion-resistant material due to chromium oxide film, eliminating the need for additional coatings.

✅ Advantages: Rust-proof, high-strength, ideal for extreme environments.
✅ Common Applications: Marine construction, food processing, medical devices, outdoor structures.

Nickel & Chrome Plating

Electroplated nickel and chrome layers provide increased corrosion resistance, hardness, and a polished appearance.

✅ Advantages: Durable, aesthetic, wear-resistant.
✅ Common Applications: Decorative hardware, automotive parts, industrial machinery.

Dacromet & Geomet

A non-electrolytic zinc-aluminum-based coating, offering high corrosion resistance and no risk of hydrogen embrittlement.

✅ Advantages: Eco-friendly (no hexavalent chromium), heat-resistant, long-term durability.
✅ Common Applications: Automotive fasteners, wind energy, bridges, heavy machinery.

Nylok & Patch Coatings

• Nylok Coating: A pre-applied nylon patch that improves thread locking and prevents loosening under vibration.

• Patch Coatings: Pre-applied thread sealants (e.g., Precote, Loctite) that enhance fastener grip and prevent leaks.

✅ Advantages: Vibration resistance, enhanced thread security, eliminates need for additional adhesives.
✅ Common Applications: Automotive, aerospace, precision electronics, structural fasteners.

Black fasteners with anti-corrosion coating used in industrial packaging applications

Zinc and black oxide coated nuts for fastener packaging and corrosion resistance

Machine screws with zinc coating used in fastener packaging and protection

Washers with galvanized and zinc coatings for fastener packaging and assembly

Brass fasteners offering corrosion resistance in specialty packaging applications

Zinc-coated self-tapping screws used in fastener packaging for structural use

Looking for fasteners that support these coating options?

Explore our full product range to find the right bolts, rods, and nuts for your project.

View All Fastener Products

Fastener Packaging Methods

Our packaging services include wooden cases, steel pails, and palletized cartons—designed to ensure safe, efficient delivery for bulk fasteners and meet diverse shipping requirements.

Carton Boxes on Wooden Pallets

Fasteners are packed in sturdy carton boxes, then securely stacked and shrink-wrapped on wooden pallets for easy transportation.

✅ Advantages: Cost-effective, forklift-friendly, suitable for large shipments.
✅ Best For: Standard fasteners, industrial bulk packaging, export shipments.

Fully Enclosed Wooden Crates

Fasteners are stored in strong wooden crates, providing enhanced protection against impact and moisture.

✅ Advantages: Durable, stackable, ideal for long-distance shipping and high-weight loads.
✅ Best For: Heavy-duty fasteners, international transport, corrosion-sensitive materials.

Steel Pails with Palletized Crates

Fasteners are packed in sealed steel pails, then placed inside palletized wooden crates for added stability.

✅ Advantages: Protects against rust, contamination, and physical damage.
✅ Best For: High-precision fasteners, automotive & aerospace parts, heavy industrial applications.

Steel Pails Secured in Wooden Crates

Fasteners are first stored in steel pails, then enclosed within reinforced wooden crates to provide maximum protection.

✅ Advantages: Double-layer protection, ideal for marine & offshore applications.
✅ Best For: Corrosion-resistant fasteners, high-value shipments, long-term storage.

Plastic-Wrapped Bundles with Steel Support Frames

Fasteners are wrapped in heavy-duty plastic film to prevent moisture and dust, then secured with steel support frames to maintain stability.

✅ Advantages: Lightweight yet strong, prevents deformation, suitable for oversized or irregularly shaped fasteners.
✅ Best For: Long-threaded rods, structural bolts, customized fastener assemblies.

Hot-dip galvanized steel washers stacked in bulk for industrial use

Shipping container loaded with pallets of industrial fasteners secured for export

Industrial fastener pallets wrapped and secured with straps inside shipping container

Heavy-duty wooden boxes designed to protect fasteners during transport

Stacked export-ready cartons for organized warehouse fastener dispatch

Finished bolts sorted in crates for final quality check and value-added fastener services

Pre-packed bolt assemblies for infrastructure use, export, and value-added fastener services

Wondering what makes TUHU a reliable export partner?

Discover our commitment to quality, consistency, and fastener readiness for global buyers.

Why Choose TUHU

In-House Testing

These tools ensure fasteners meet mechanical performance, corrosion resistance, dimensional accuracy, and industry standards before shipment.

Tensile Testing Machine

Measures the tensile strength and elongation of fasteners, ensuring compliance with ASTM, ISO 898-1, and DIN standards.

Hardness Testing Machine

Determines material hardness using Rockwell (HRC, HRB), Brinell (HBW), or Vickers (HV) scales, essential for fastener durability assessment.

Salt Spray Corrosion Test Chamber

Evaluates corrosion resistance of coatings and finishes under ISO 9227 and ASTM B117 standards, ensuring long-term fastener durability in harsh environments.

Digital & Vernier Calipers

Ensures precise measurement of fastener dimensions, including thread pitch and diameters, in line with ISO 965 and ASME B1.1 specifications.

GO/NO-GO Thread Gauges

Verifies thread tolerance and fitment of fasteners according to ISO 1502, ASME B1.2, and DIN 13-50 standards.

Measuring bolt diameter with caliper as part of value-added fastener services

Using a pitch gauge to inspect thread accuracy for value-added fastener services

Fastener tensile testing equipment for value-added fastener services and quality assurance

Corrosion resistance testing for zinc and coated fasteners in value-added fastener services

Thread measurement tools used in value-added fastener services for pitch verification

Hardness test equipment used in value-added fastener services to verify material strength

Precision plug gauges used in value-added fastener services to verify internal thread tolerance

Measuring nut diameter with caliper as part of value-added fastener services for quality control

Need specific testing like salt spray or tensile strength validation?

Get in touch to discuss your project’s performance requirements with our team.

Contact TUHU

Material Certificates & Quality Reports

All fasteners are manufactured in accordance with ASTM, DIN, and other international standards. Material test certificates (MTCs) and third-party inspection reports from SGS, TUV, or equivalent agencies are available upon request to meet specific project requirements.

Require SGS, MTC, or third-party quality certifications?

Contact us to confirm available documentation and quality assurance processes.

Contact TUHU

Complete Fastener Solutions

Why TUHU

With years of expertise in fastening solutions, we are committed to quality, innovation, and customer satisfaction. Discover our journey and what sets us apart.

About TUHU

TUHU’s Fasteners Range

Explore our full range of high-quality fasteners, from bolts and nuts to industry-standard solutions. No matter the application, we have the right fastening products to meet your needs.

Explore All Products

Industry Expertise

With years of manufacturing and export experience, we help customers navigate fastener standards, coatings, export expectations, and documentation needs.

Learn More

Trusted Fastener Manufacturer

As a trusted name in the fastener industry, TUHU Fasteners supplies high-quality standard fasteners—including bolts, nuts, washers,, threaded rods, bent bolts, and cutting plates. Our expertly manufactured products serve industries worldwide with strength, durability, and reliability.

Request a Quote

All Products