By:SourceFactoriesImport managers evaluating tunnel ring connection bolts face a clear sourcing question: does the spear bolt listing from Taicang Zhongbo Railway Fastening Co., Ltd. justify a request for quotation? The SKU shows a grade 8.8 tunnel ring connection bolt…
Market Need: Why Tunnel Ring Connection Bolts Matter to Buyers
Rail and transit tunnel projects depend on segmental linings that must resist ground pressure, water ingress, and long-term fatigue. Import managers and distributor buyers sourcing spear bolts for tunnel ring connections need suppliers with the right certifications, fastening grades, and production stability.
This listing from Taicang Zhongbo Railway Fastening Co., Ltd. addresses a narrow but critical procurement question: can one Chinese manufacturer supply tunnel spear bolts with documented capacity and standards? Initial data suggests the SKU is built for shortlisting – provided buyers verify the technical blank spots below.
- Certification coverage: Arema, BS, ASTM, UIC, TB
- Warranty: More than 3 years
- Production capacity: 600 tonnes per month
- Price band: US$ 2.83 – 3.20 per unit
- Customization: Available
Product Description: Spear Bolts for Tunnels from Taicang Zhongbo
The listed product is identified as spear bolts for tunnels, with the supplier model number ZBRF. The part is classified under tunnel ring connection bolts, and the bolt grade is stated as 8.8. The product type is "Track Train," consistent with railway fastening applications rather than general construction hardware.
Buyers should note that several attribute fields in this SKU repeat the product name – such as age, charge time, battery life, and power. These appear to be inherited from a mobile accessory category template and do not describe the actual fastening product. Procurement teams should request a mechanical datasheet instead of relying on those fields.
Proof Points: Specs and Certifications as Listed
The following data is taken directly from the supplier listing. Use it as a checklist for technical comparison, not as a substitute for mill certificates or sample testing.
Model NO.: ZBRF
Type: Track Train
Part: Tunnel Ring Connection Bolts
Bolt Grade: 8.8
Certification: Arema, BS, ASTM, UIC, TB
Warranty: >3 Years
Production Capacity: 600t/Month
Price Range: US$ 2.83 - 3.20
Customization: Available
Color: Customized
Transport Package: Woven Bag and Wood Pallet
Specification: SGS
Trademark: ZBRF
Origin: China
The "SGS" entry appears in the specification field; buyers should confirm whether this refers to third-party inspection, test reports, or a specific quality mark. The listed certifications include several railway-specific standards, but exact test documentation should be requested for each project requirement.
Company Profile: Taicang Zhongbo Railway Fastening Co., Ltd.
The supplier is a Chinese railway fastening manufacturer. Its product scope in the listing includes rail, clip, track, bolt, with nut, screw, spike, maintenance, and tool. This range suggests a focus on rail infrastructure components rather than generic bolts, which can be relevant for tunnel and track maintenance contracts.
No factory address, year established, or quality system details are provided in the listing beyond the origin "China." Procurement teams should request site audit documentation, ISO or equivalent quality system evidence, and recent load-test reports before commercial negotiation.
Next Steps for Buyers: Shortlist Verification
This SKU meets basic fit criteria on paper: 8.8 grade, tunnel ring connection part, 600 tonnes monthly capacity, and a low unit price. But shortlisting should depend on sample approval and document verification, not listing data alone.
- Request a sample lot of spear bolts for tunnel ring connections, specifying torque and preload requirements.
- Ask for material certificates and traceability reports showing compliance with Arema, BS, ASTM, UIC, or TB standards relevant to your project.
- Confirm whether the listed customization covers thread type, coating, length, or packaging; do not assume OEM readiness beyond that.
- Clarify minimum order quantity, lead time, and Incoterms – the listing does not state MOQ.
- Check the transport package details: woven bag and wood pallet are listed; verify fumigation/certification for export if needed.
Disclaimer
This brief is based solely on the public listing data for "Spear Bolts Manufacturer - for Tunnels" from Taicang Zhongbo Railway Fastening Co., Ltd. Product categories on the platform show consumer electronics and mobile phone accessories, which appear inconsistent with the railway fastening attributes; buyers should clarify technical classification with the supplier. All specifications, certifications, and capacity figures are as stated by the seller and require independent verification.
Related product: Spear Bolts Manufacturer - for Tunnels
