Import All Thread Bar Bolt — Buy in Bulk from Supplier in China

The All Thread bar Bolt from Shandong Tongrui Mining Technology Co., Ltd. is a continuous-thread rock bolt engineered for underground support and ground stabilisation in mining and tunnelling operations. The bolt features full-length threading that permits nut adjustment at any point along the bar, enabling precise tensioning against plates and meshes. Available in diameters from 20mm to 25mm and lengths from 1.2m to 3.0m, with yield strengths typically between 400MPa and 600MPa depending on steel grade selected. The product is manufactured at the company's base in Taian, Shandong Province, with access to raw material suppliers through the Manzhuang Steel Market infrastructure.

Manufactured from ribbed or smooth carbon steel bar stock, typically conforming to ASTM A615 or GB/T 1499.2 reinforcement standards, with optional hot-dip galvanising or epoxy coating for corrosion protection in wet or chemically aggressive ground conditions. Thread profile is typically rolled rather than cut, preserving grain structure and improving fatigue performance. The bolt head is usually forged with an integral anchor nut or supplied with a separate domed plate and nut assembly. Typical surface treatments include plain black, hot-dip galvanised to ASTM A153, or duplex coating systems for salt-environment applications. Thread pitch is standard coarse metric or imperial depending on market destination.

Primary applications include permanent and temporary support in underground metalliferous and coal mines, tunnel linings, slope stabilisation, and civil engineering retaining structures. Buyers are typically mining contractors, tunnel engineering consortia, and geotechnical specialist distributors. The continuous thread design suits resin or cement grouted installations, mechanical anchors, and friction bolt systems. For procurement, buyers should confirm steel grade certification, tensile test reports, and galvanising thickness measurements. Thread conformity to ISO 261 or ASME B1.13 should be verified if interoperability with existing inventory is required. Packaging is typically bundled with steel strapping; confirm bundle quantities and protection against thread damage during sea freight.

Shandong Tongrui Mining Technology Co., Ltd. is located at Manzhuang Steel Market in Taian, Shandong Province, China, a region with established steel processing and mining equipment manufacturing infrastructure. The supplier is classified at harbour trust tier with an imported supplier tier designation, indicating they source or trade imported material grades or technologies alongside domestic production. The company address places it within one of Shandong's concentrated steel distribution zones, with logistical access to Qingdao port for export shipment. Response rate and average response time data are not currently available, so direct enquiry response should be tested during initial contact.

The supplier's product focus centres on mining technology and fastening systems, specifically rock bolting equipment for underground support. No verified information is available regarding year of establishment, registered capital, production floor area, employee count, or annual turnover. Buyers should request business licence verification, quality management system certification (such as ISO 9001 if held), and mining product safety certificates relevant to destination market requirements. The listing presents the All Thread bar Bolt as a manufacturer-direct product, though buyers should confirm whether production is in-house or subcontracted through the steel market network. Third-party factory audit or video inspection is advisable before committing to substantial orders.