Square Head Bolt Carbon Steel A307 Hot-Dip Galvanized - Guardrail
Product features
The square head bolt is a carbon steel A307 fastener with a hot-dip galvanized finish tailored for guardrail assemblies, featuring a square head and threaded shank that enable strong clamping, easy wrench engagement, anti-rotation behavior and improved corrosion resistance. It secures heavy-duty connections under shear and tensile loads while delivering value through high quality, competitive pricing, timely delivery and technical support for long-term outdoor performance. Backed by more than 15 years in the fasteners industry and proficiency with IFI standards, it is supplied to North and South America, Europe, East and Southeast Asia and Australia with one-stop services including samples, material and test reports—please specify size, quantity, material/grade, surface or provide drawings for non-standard parts.
Company profile
Our company is a specialist manufacturer of highway and industrial fasteners, delivering high-quality square head A307 carbon steel bolts for guardrail systems. We combine precision cold-forming and heat-treatment with in-house hot-dip galvanizing to ensure corrosion resistance and consistent mechanical performance. With ISO-certified quality management, volume production capacity, and flexible OEM capabilities, we serve infrastructure contractors, distributors, and international buyers. Value-driven services include strict inspection, traceable material certification, timely lead times, competitive pricing, and responsive technical support. Committed to safety and durability, we prioritize regulatory compliance, sustainable galvanizing practices, and long-term partnerships that reduce lifecycle costs and installation risk, earning trust.
Why choose us
Our company is a specialist manufacturer and supplier of heavy-duty fasteners, producing carbon steel A307 square-head bolts hot-dip galvanized for guardrail systems. We combine precision cold/hot forming, robust heat treatment and proven galvanizing processes to deliver consistent strength, dimensional accuracy and long-term corrosion protection. Focused on compliance, rigorous QC and performance testing, we support construction and infrastructure projects with reliable, batch-traceable components. Value-driven services include flexible quantities, OEM customization, competitive pricing, expedited logistics and responsive technical support. By prioritizing safety, durability and on-time delivery, we help clients reduce installation risk and life-cycle maintenance costs for critical roadside protection.
| Market: | South&north Amrica/Europe/East&South east Asia/ Australia and ect. |
| Professional: | More than 15 years experience in fasteners industry Our Main market is North&South America and proficient in IFI standard. |
| Our advantage: | One-stop shopping; High quality; Competitive price; Timely delivery; Technical support; Supply Material and Test Reports; Samples for free |
| Notice: | Please lets know the Size, quantity, Material or Grade, surface, If it is special and Non-standard products, please supply the Drawing or Photos |
xarella.huang@jm-fastener.comSince our establishment in 2006, JM has been adhering to the mission of creating maximum value for customers by providing differentiated services, and making a positive contribution to the society.