Can I customize the head marking?

Yes, head marking can display your brand name along with the standard code like A325TC.

What is the lead time for production?

The average lead time is within 15 workdays for both peak and off-season periods.

Does the bolt rotate during fastening?

No, the bolt does not rotate when fastening, ensuring stable and accurate clamping force.

Washer Assemblies Torque Bolt High Tensile Strength Bolt

Name: Twist off Type Tension Control Bolt Structural Bolt/Nut/Washer Assemblies Torque Bolt High Tensile Strength Bolt
Brand: Hangzhou Jiaxiang Gaoqiang Bolts Co., Ltd.
SKU: 2057330085

Zhejiang, ChinaHangzhou Jiaxiang Gaoqiang Bolts Co., Ltd.

US$0.20-2.50

1,000 Sets

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Material

High Strength Steel

Type

Round Head

Connection

Common Bolt

Head Style

Round

Standard

DIN, ANSI, GB, JIS

Grade

10.9

Application

Machinery, Environmental, Building, Steel Structure

Finish

Dacromet

Size

5/8"~1-1/2"

Tensile Strength for 1/2"-1"

150000psi~173 000 Psi

Yield Strength for 1/2"-1"

120000psi~130 000 Psi

Hardness

33~38HRC

Transport Package

Carton or Barrel and Wooden Pallet

Specification

5/8"~1-1/2"

Trademark

HYZ or customer brand

Origin

Hangzhou China

HS Code

7318

Production Capacity

5000000PCS/Month

Key features

High Tensile Strength: Grade 10.9 with tensile strength up to 173,000 PSI for heavy-duty applications.

Twist-Off Design: Shear-off notched end ensures accurate torque value and confirms fastening completion.

Easy Installation: Noiseless installation using electric wrench without requiring high-level fastening techniques.

Durable Finish Options: Available in Dacromet, black oxide, phosphating, and electronic galvanized coatings.

Full Assembly Set: Includes A490TC bolt, DH/2H nut, and F436 washer for complete structural connection.

Strict Quality Control: 100% visual and function inspection with ISO9001 and BV certifications.

Custom Branding: Head marking can display customer's brand alongside standard A325TC/A490TC codes.

Flexible Customization: Supports OEM/ODM services with full customization from samples or designs.

Company profile

Hangzhou Jiaxiang Gaoqiang Bolts Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 18 years CertifiedNearest Port: Shanghai Port, Ningbo PortAverage Response Time: ≤6.94h

AI-Powered supplier vetting

SummaryThe supplier is identified as a trading company, although the supplied company descriptions also state that it specializes in manufacturing steel-structure fasteners, including high-strength heavy hex-head bolts, tension-control bolts, shear studs, and segment bolts. It reports ISO9001 and ISO14001 certification, historical OHSAS18001 and CE certifications, four production lines, six to ten quality-control staff, five R&D engineers, and stated output of 6,000 tons of bolts and 6,000,000 shear studs. It exports mainly to Southeast Asia and the Middle East, with exports representing 41%–50% of total sales and exporting beginning in 2007. Production scale and customer references are positively indicated, but overseas service infrastructure, detailed innovation services, customization/OEM/ODM capability, raw-material traceability, and after-sales capability are not sufficiently documented. Financial information is excluded.

CertificationsThe supplier explicitly reports ISO9001:2015 and ISO14001:2015 certificates. It also states that it previously passed ISO9001:2008, ISO14001:2004, OHSAS18001:2007, and CE certification, while slice 8 identifies provincial and municipal high-tech enterprise ratings. The current validity of the older certifications is not established.

R&D capabilityThe supplier is described as a Zhejiang and Hangzhou high-tech enterprise and as having advanced production equipment and testing instruments. However, the supplier type for professional R&D, new-product R&D, 3D design, SDK availability, and other detailed innovation capabilities is unknown, so the breadth of its innovation capability cannot be confirmed.

Production capacityProduction capability is supported by four production lines, reported output of 6,000 tons of bolts and 6,000,000 shear studs, six to ten quality-control staff, and a stated off-peak lead time within 15 workdays. The company also reports more than ten years of development and advanced production and testing equipment, providing explicit evidence of operational capacity.

Client casesThe supplier states that it has become a supplier of major domestic steel-structure manufacturers, including China Railway Major Bridge Engineering Company, and has joined relevant industry associations. This is explicit evidence of at least one named customer relationship and domestic industry participation, although order scope and performance details are not provided.