DIN931 Hex Head Bolts

Professional Manufacturing Experience

We have many years of professional experience in manufacturing DIN931 partial‑thread hex head bolts and high‑strength structural fasteners. Our fully automatic cold heading, thread rolling and heat treatment production lines ensure precise thread, uniform head forming, stable mechanical performance and consistent batch quality. Our DIN931 bolts are widely applied in global steel structure projects, mechanical equipment assembly, construction engineering, bridge supporting and heavy‑duty industrial facilities, winning long‑term trust from overseas distributors and engineering contractors.

Strict Process & Quality Control

Our DIN931 hex bolts are produced strictly in accordance with DIN and ISO international standards. The whole manufacturing process includes raw material incoming inspection, cold forging, thread rolling, heat treatment, surface treatment and finished product comprehensive testing. Each batch undergoes strict inspections including dimensional accuracy, tensile strength, yield strength, hardness test, torque test and salt‑spray resistance test. Our professional QC team equipped with high‑precision testing instruments monitors every production link, ensuring stable load‑bearing capacity, reliable fastening performance and long service life under heavy‑load working conditions.

Authoritative Certification & Standard Compliance

Our factory has passed ISO 9001 quality management system certification and implements full‑process standardized production management. All DIN931 hex bolts comply with international industrial standards and meet EU CE, RoHS environmental requirements. We can provide complete supporting documents including material test reports, mechanical property inspection reports, factory quality certificates and export customs clearance documents, fully satisfying high‑standard procurement, third‑party audit and project acceptance needs of global customers.

Genuine Factory & Secure Supply

As a real fastener manufacturer with independent production workshops, heat‑treatment workshops and large finished‑product warehouses, we have a professional foreign trade and technical service team. We adopt moisture‑proof, rust‑proof export cartons and pallet packaging to ensure safe long‑distance ocean transportation. Stable production capacity ensures short delivery cycles and flexible response to urgent orders and large‑batch projects. We provide timely after‑sales support and professional technical guidance, becoming a trustworthy long‑term partner for global importers, engineering firms and equipment manufacturers.

Product Parameter Table