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HOT-DIP GALVANIZING · FASTENER AND FABRICATION ROUTES

Hot-Dip Galvanizing for Fasteners and Fabricated Steel

Hot-dip galvanized threaded fasteners and fabricated iron or steel articles follow different scope routes. The inquiry must identify the component type before coating thickness, thread handling, venting, drainage, masking, dimensions, weight and inspection requirements can be reviewed.

Configure Hot-dip galvanizing job work Review specifications

Hot-dip galvanized structural fasteners and fabricated steel parts — Hot-dip galvanizing job work reference image

ISO 10684 threaded-fastener route
ISO 1461 fabricated-article route
Thread treatment captured
Thickness reporting when specified

TECHNICAL SUMMARY

What to include in the inquiry

Use the applicable drawing and governing standard as the final authority. Other / Custom keeps unusual requirements inside the same RFQ.

Fastener referenceISO 10684:2004 plus its applicable corrigendum / contract edition

Fabricated-article referenceISO 1461:2022

Component routesFastener / Threaded Part, Fabricated Component, Strut / Channel or Other / Custom

Thread handlingFunctional, masked, re-tapped or customer-defined

Fabrication inputsDrawing, maximum dimensions / part weight, venting, drainage and masking where relevant

Report optionCoating-thickness report when specified and applicable

TECHNICAL REFERENCE

Coating and inspection tables

These tables identify the applicable technical reference and the information that must be agreed in the purchase specification. They do not replace the governing standard, drawing or customer acceptance criteria.

Select the correct hot-dip galvanizing standard

Component	Reference	Verified scope	RFQ emphasis
Threaded steel fastener	ISO 10684	Hot-dip spun galvanized coatings on coarse-threaded steel fasteners within the standard's stated size and property-class range	Thread size / pitch, property class, mating components, thread treatment and coating requirement
Fabricated iron or steel article	ISO 1461	Batch hot-dip galvanized fabricated articles, excluding product categories with specific standards	Material, dimensions / weight, design details, significant surfaces, coating requirement and inspection
Continuously coated sheet, wire, mesh, tube or pipe	Product-specific standard	ISO 1461 states exclusions for continuously galvanized products and automatically galvanized tube / pipe	Identify the actual product standard; do not use the fabricated-article route by default

The standard identifier must match the product scope. Confirm the latest contractually adopted edition and any product-specific dimensional requirements.

What an inspection report should identify

Report content must follow the purchase order, governing standard and agreed inspection plan.

Evidence	What must be identified	Important boundary
Coating-thickness / DFT report	Part or lot identity, measurement method, measurement locations, units and recorded values	The method must suit the coating/substrate combination and part geometry; DFT is not a universal method name for every metallic coating.
Salt-spray report	Test standard and mode, specimen identity, exposure duration, evaluation intervals and agreed failure criterion	A pass/fail conclusion requires acceptance criteria from the product or customer specification.
Visual and coverage inspection	Significant surfaces, coverage, visible defects and any permitted contact or rack marks	Appearance limits must be agreed; colour alone does not establish coating performance.
Functional verification	Thread fit, masking, contact areas, dimensional limits or other drawing-defined features	The required checks depend on the component and are not implied by the coating name.

Reports are available when specified in the RFQ and confirmed in the quotation. Sampling, laboratories, witness points and acceptance criteria must be agreed before processing.

THREADED FASTENERS

Use ISO 10684 for hot-dip galvanized fasteners

ISO 10684 is the product-specific reference for hot-dip spun galvanized threaded steel fasteners within its dimensional and property-class scope. Thread allowance and mating compatibility require explicit review.

FABRICATED ARTICLES

Use ISO 1461 for fabricated iron and steel articles

ISO 1461 covers general properties and test methods for batch hot-dip galvanized fabricated iron and steel articles. Its scope excludes products such as fasteners where a specific standard exists.

DESIGN FOR GALVANIZING

Provide geometry, size, weight and closed-section details

Fabricated parts may require process-specific review of venting, drainage, lifting, distortion risk, overlapping surfaces and trapped volumes. Supply the drawing for non-simple fabrications.

THREADS AND MASKING

State which features must remain functional

Identify internal and external threads, fitted areas, electrical-contact surfaces, masking and any permitted re-tapping or post-processing. These requirements affect feasibility and price.

BUYER QUESTIONS

Frequently asked questions

Does ISO 1461 apply to threaded fasteners?

ISO 1461 excludes products such as fasteners where a specific product standard exists. ISO 10684 is the fastener-specific hot-dip galvanized coating reference.

Why must thread treatment be stated?

Hot-dip zinc affects thread dimensions and mating. Masking, allowance, re-tapping or other handling must be agreed for functional threads.

What should be provided for a fabricated part?

Provide material, drawing, maximum dimensions or weight, closed-section and vent / drain details, masking, significant surfaces and inspection requirements.

BUILD ONE MULTI-ITEM RFQ

Ready to specify Hot-Dip Galvanizing?

Describe the supplied parts, define the coating and reporting requirements, then provide buyer and delivery details once at the end.

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