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  • Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar
  • Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar
  • Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar
  • Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar
  • Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar
  • Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar
Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar
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Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar

$0.22-$1.80/ Piece|100 Piece/Pieces (1 lot) (Min. Order)

Customization:

Customized logo（Min.Order: 10000 pieces）
Customized packaging（Min.Order: 100000 pieces）
Graphic customization（Min.Order: 10000 pieces）
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Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Secure Assembly Solutions: Hollow external thread bars designed for fastening and connecting components in mechanical systems, offering precise torque and grip due to uniform threading.
  • Versatile Structural Support: Hollow design reduces weight while maintaining strength, ideal for applications requiring lightweight yet durable fastening solutions.

Key features

  • 1. Corrosion-Resistant Zinc-Plated Construction

    • With zinc-plated iron material, ensure long-lasting durability in humid or corrosive environments. Outperforms uncoated iron by reducing rust formation by up to 50%*.

  • 2. Staggered Arrangement for Quick Size Selection

    • With a staggered display design, easily identify and select the correct thread size (M6–M30) at a glance, saving up to 30% of project setup time*.

  • 3. Comprehensive Thread Size Range for Versatile Applications

    • With thread sizes spanning M6 to M30, accommodate diverse project requirements—from fine mechanical assemblies to heavy-duty industrial frameworks.

  • 4. Heavy-Duty Industrial Performance

    • Designed for construction and automotive applications, these bars deliver secure fastening in high-stress scenarios, maintaining structural integrity under continuous load.

  • 5. Compliance with Industrial Corrosion Standards

    • With zinc plating meeting ISO 1461 corrosion-resistance standards*, ensure adherence to global quality benchmarks for outdoor and industrial use.

Product details

Wholesale Zinc Plated Iron M6 M8 M10 M12 M14 M16 M18 M20 M25 M30 Hollow External Thread Bar

Wholesale Zinc Plated Iron Hollow External Thread Bars offer robust mechanical performance with corrosion-resistant zinc plating and precise threading. With a diverse range of thread sizes (M6–M30) and lengths (20–150mm), these rods are engineered for versatile assembly applications. The staggered design ensures easy selection, while uniform threading guarantees secure fastening in construction, automotive, and industrial projects.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialIron with zinc platingStructural assembly, outdoor equipment
Thread Size RangeM6, M8, M10, M12, M14, M16, M18, M20, M30Customized fastening requirements
Length Options20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 100mm, 150mmProject-specific dimension needs
Surface TreatmentZinc plating (ISO 1461)Corrosion-prone environments

Customization guide

Adjustable thread sizes (M6–M30) and lengths (20–150mm) to meet specific project requirements, ensuring compatibility with diverse assembly needs.

Get inspired

With a full spectrum of thread sizes and lengths, these rods simplify precision assembly. The zinc-plated finish enhances durability, making them ideal for outdoor machinery or marine equipment where corrosion resistance is critical.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Corrosion ResistanceZinc Plated (ISO)Zinc + PassivationZinc + Epoxy Coating
Thread Size RangeM6–M16M6–M20M6–M30
Max Length100mm120mm150mm
Thread PrecisionClass 6gClass 5gClass 4g

Supplier's note

  1. Technical Breakthroughs:

    • Zinc Plating (ISO 1461): Ensures 30% longer lifespan in corrosive environments.
    • Uniform Threading: Achieves 20% faster assembly due to precise torque consistency.
    • Iron Core: Delivers 50% higher load-bearing capacity compared to aluminum alternatives.

  2. Version Selection Guide:

    • Base Model: Ideal for general assembly tasks (e.g., furniture, light machinery).
    • Advanced Model: Recommended for corrosive settings (e.g., marine equipment) with its dual-layer protection.
    • Pro Model: Optimal for heavy-duty applications (e.g., industrial frameworks) requiring M30 threading and maximum load capacity.

With the Pro version’s triple-coated zinc plating, you can safely handle chemicals while maintaining structural integrity. Pair its M30 threading with high-tensile bolts for seamless integration in large-scale projects.

Frequently asked questions

  • Which thread size (M6 to M30) is best suited for light-duty construction projects?

  • How do I clean and maintain zinc-plated threaded bars to prevent rust?

  • Why choose zinc-plated iron over stainless steel for outdoor use?

  • Can the thread sizes or lengths be customized for specific projects?

  • Is the zinc plating compliant with international corrosion standards?

  • What applications are these hollow external thread bars best suited for?

  • How does the zinc plating enhance the durability of iron threaded bars?

  • Why are the bars arranged in a staggered formation in the product image?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Corrosion ResistanceOutdoor construction, marine environmentsZinc Plating (ASTM A153 compliant) ▲
(500+ hours salt spray resistance)		Resists corrosion 5x longer than uncoated iron (ideal for wet/damp settings)Not suitable for extreme salinity (e.g., offshore drilling)
Thread PrecisionPrecision machinery assemblyTolerance ±0.05mm (ISO 2978) ▲
(0.01mm tighter than industry standard)		Ensures secure fastening in tight spaces (e.g., automotive components)Requires specialized tools for installation (e.g., torque wrenches)
Material StrengthHeavy-duty applicationsYield Strength 250 MPa (ASTM A36) ▲
(vs. 200 MPa in standard iron bars)		Supports heavy loads (e.g., structural frameworks)Less ductile than steel (may deform under extreme torsion)
Length CustomizationCustom fabrication projects10+ standard lengths (20mm–150mm) ▲
(vs. 5 lengths in industry average)		Reduces waste in tailored applications (e.g., furniture assembly)Limited to pre-set lengths (no on-demand cutting service included)
Size RangeDiverse industrial needsM6–M30 thread sizes (ISO 228-1) ▲
(covers 6 sizes beyond industry baseline)		Covers small (M6) to large-scale (M30) projects (e.g., machinery brackets)Larger sizes (M25+) may require heavier tools for installation
Cost EfficiencyBudget-conscious projects15% lower cost than stainless steel (ISO 3506) ▲
(vs. 20% in competitors)		Economical for standard applications (e.g., general construction)Higher replacement costs in corrosive environments (e.g., chemical plants)

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