MANUFACTURER PRODUCT FILE · 2026-10-22

Steel-structure fasteners

Gem-Year publishes a dedicated structural-fastener series. Its listed standards and ranges describe the series; they do not establish interchangeable assemblies or current certification.

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PRODUCT REFERENCE

Steel-structure fasteners

Materials: Low/medium-carbon steel and alloy steel
Metric production range: M16–M30, cold forged
Inch production range: 1/2–1 1/4 in cold forged; 1 3/8–1 1/2 in hot forged

Specification summary from the company publication linked below.

Structural bolt and nut assemblies in Gem-Year’s catalogue image — Structural fastener range · Gem-Year catalogue image. Series or schematic reference; not an exact dimensional product photograph. Original source ↗

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Source: company publication

Checked on 2026-10-22. Published ranges describe the catalogue, not live stock or a confirmed quotation.

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PUBLISHED SPECIFICATIONS

What the source actually states.

Parameter	Company-published information	Source
Materials	Low/medium-carbon steel and alloy steel	Company page ↗
Metric production range	M16–M30, cold forged	Company page ↗
Inch production range	1/2–1 1/4 in cold forged; 1 3/8–1 1/2 in hot forged	Company page ↗
Length	40–280 mm	Company page ↗
Published strength designation	10.9S	Company page ↗
Listed standards	AS 1252, GB/T 1231, JIS B1186, ASME B18.2.6, EN 14399, GB/T 10433	Company page ↗
Published surface finishes	Blackening and Dacromet-type coating	Company page ↗

Standards are listed as published by the company; no equivalence between standards, certification or suitability for your application is implied.

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Exact bolt/nut/washer assembly and standard edition
Destination-market documentation and intended use
Coating designation and assembly-level test records

Commercial details to request

MOQ: Not confirmed in this source
Unit price / currency: Not confirmed in this source
Lead time: Not confirmed in this source
Sample availability: Not confirmed in this source
Packing & Incoterms: Not confirmed in this source
Current certificates / test reports: Not confirmed in this source

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