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CHINA / ZHEJIANG / FASTENERS

Gem-Year Industrial Co., Ltd.

Fastener manufacturer based in Jiashan, Zhejiang. Its public catalogue covers general, structural, automotive and other application-specific fasteners. Start with the product tables below, then confirm the exact manufacturing entity and order specification.

Bolts & nutsScrewsPrecision wireRailway fastening productsCarbide dies
Gem-Year company premises shown on its official company website
Company premises · Image published by Gem-Year. Original source ↗

Products & published specifications

4 detailed product files

Select a family to see the source, dimensional range and questions to confirm. Images below identify product families. Read each caption for the source and illustration status.

Images are credited individually. Technical illustrations explain published dimensions; they are not factory photographs. Series photographs do not establish individual specifications.

Selected published fastener ranges
Product familyMaterialMetric rangeStandards / finish reference
Hexagon-head boltsLow/medium-carbon & alloy steelsM4–M36 cold; M39–M64 hot forgedGB/T 5782, GB/T 5783, ISO 4014 / 4017
Socket-head cap screwsLow/medium-carbon & alloy steelsM4–M36 cold; M39–M42 hot forgedDIN 912, ISO 4762, GB/T 70.1
Structural seriesLow/medium-carbon & alloy steelsM16–M30 cold forgedSee dedicated structural series
Drywall screwsLow-carbon steelM3.5 / M4.2 / M4.8Zinc plating / phosphating

Each row describes a published family, not all combinations or live availability. Product files link the individual technical source; structural and general-forged tables have distinct ranges.

Original comparison source ↗

Product series in the official catalogue

General bolts & nuts

Carbon and alloy steels; cold- and hot-forged ranges are specified separately. Includes socket, hexagon, flange and other head forms.

Company publication ↗

Automotive fasteners

The dedicated series lists ISO, DIN, SAE, ASTM, JIS and GB families, alongside non-standard development. A drawing and part-level specification are still required.

Company publication ↗

Power-sector fasteners

The series lists carbon/alloy steels, hot-dip galvanizing and property classes 4.8, 8.8 and 10.9. Confirm which combination applies to the selected part.

Company publication ↗

Structural fasteners

Dedicated structural range with its own size, finish and assembly requirements. See the product file; do not substitute general-bolt ranges.

Company publication ↗

Drywall screws

Low-carbon steel; zinc-plated or phosphated options. Separate metric and inch designations are published.

Company publication ↗

Company facts

The following identity information is attributed to the company website. It does not replace registration or supplier approval checks.

Company identity and published contact information
FieldCompany-published information
Chinese entity晋亿实业股份有限公司
EstablishedNovember 1995
Listed companyShanghai Stock Exchange · 601002
Published locations8 Jinyi Avenue; 66 Songhai Road, Jiashan Economic Development Zone, Zhejiang
Official websitegem-year.com
Published telephone+86 573 84185001
Published email[email protected]
Read the official company profile ↗

Manufacturing & testing

Forming routes

The general-fastener table identifies cold forging and hot forging with different size envelopes. It is a catalogue range, not a statement of current stock.

Testing information

The R&D page shows assembly-simulation testing, contour measurement and spectrometry equipment. Ask for the actual test plan and reports for the ordered product.

Plant & entity boundary

The corporate profile describes subsidiaries. Confirm the producing plant, invoicing entity and certificate holder before supplier approval.

View company-published equipment and documents ↗

Technical & quality documents

These are public-document leads. Current certificate validity and product applicability have not been independently established.

General fastener technical table

Technical reference JSK20211001; dimensions, head forms and standards.

Before approval

Request the latest revision and a part-specific drawing.

Quality & management certificates

The R&D page displays CNAS, IATF 16949, ISO 9001 and other certificate headings.

Before approval

Obtain legible current copies; check holder, site, scope, number and expiry.

Structural-product documentation

The site displays EN 14399 and EN 15048 certificate headings.

Before approval

Confirm the exact assembly and destination-market documents. Displayed headings alone do not establish current conformity.

Request the document set for your part →

What to confirm before an order

Buyer guidance from Honyawn Atlas — not a statement of the manufacturer’s commercial terms.

01

Exact product

Standard and edition, drawing revision, thread, diameter, length, grade and finish.

02

Order & delivery

Quantity per size, repeat volume, destination, packaging, lead time and trade terms. No MOQ or price has been verified here.

03

Quality records

Required inspection plan, lot traceability, material and dimensional reports, and any application-specific tests.

04

Manufacturing entity

Identify the actual producing plant and contracting company; do not assume every group capability applies to every site.

Have a specification ready?

Include the drawing or standard, quantity per size and delivery destination. Select quotation, samples or technical documents in the request form.

Prepare a sourcing request →

Sources & review record

Reviewed 2026-10-23. The publisher and document scope are identified below. Information is attributed to each publisher; no site visit or independent factory audit is claimed.

  1. Company profile & published identity ↗

    Establishment, listed identity, business scope and addresses

  2. Fastener product centre ↗

    Published product series

  3. General-fastener technical table ↗

    Materials, forming routes, dimensions and standards

  4. Structural series ↗

    Structural-fastener range

  5. Power-sector series ↗

    Materials, galvanizing and property classes

  6. Automotive series ↗

    Standards families and product-development scope

  7. Drywall series ↗

    Screw dimensions and finishes

  8. R&D, testing equipment & certificate display ↗

    Equipment descriptions and certificate headings; validity not independently established

  9. Official contact page ↗

    Company contact channel

Submit a correction or a newer source →
Send a sourcing inquiry ↗