Solar HDG Expansion Bolt

The Solar HDG Expansion Bolt from China is treated with a full-wrap hot-dip galvanizing process (with a thickness exceeding 50 micrometers), which ensures a strong bond with the substrate and does not peel off during construction. Minor damages will heal on their own, and it can be used outdoors for over 15 years without rusting. It can operate normally in high-corrosive environments such as coastal areas, rainy regions, and industrial zones.

Structural Design

This hot dip galvanized expansion bolt is composed of a bolt rod, slotted expansion sleeve, nut and flat washer. The expansion sleeve has precision slots, expands evenly when locked, fits the base perfectly. No loosening or vibration after anchoring, handles static and regular dynamic loads stably.

Specifications & Performance

Standard sizes: M6-M16, lengths 50mm-200mm, custom non-standard available. Grade 4.8+, great tensile/shear strength, works in -60℃ to 200℃ extreme temps for the HDG expansion anchor bolt.

Base Surface Compatibility

Anchors securely to concrete, solid brick, stone and more. No extra parts needed, meets load demands for solar brackets, guardrails, curtain walls and machinery.

Advantages and Features

Go for our bolts—tough, durable, no fuss! Heavy galvanizing stops rust in harsh outdoor conditions, no constant replacing or upkeep. Snug fit, never loosens or vibrates, perfect for solar and municipal jobs.Fits all substrates & temps, standard stock + custom options. One-person install, quick drill-clean-insert-fasten, saves labor/time. Mass-made for steady quality, no extra costs, long-lasting and cost-effective!

Works great in harsh environments, no rust-caused failures.

Secure Anchoring

Precision-slotted expansion sleeve locks tight to the base—no loosening, no vibration. Stable anchoring for both static and dynamic loads.

Wide Compatibility

Fits different building substrates and extreme temps. Standard sizes cover most projects, custom options available. Great for all outdoor jobs like solar, municipal and construction.

Easy Installation

No complex construction procedures, operable by a single person. Simply drill and clean the hole, insert the bolt and tighten the nut to complete anchoring, greatly improving construction efficiency.

High Cost-Effectiveness

Mass-produced for steady, reliable quality. HDG’s long corrosion protection cuts out all follow-up maintenance costs.Lasts way longer than regular electroplated fasteners, cuts down the total fastener cost for your projects.Installation Instructions

Drilling

Drill a hole with matching diameter and depth on the base surface according to the selected bolt specification; the hole depth should be slightly longer than the embedded part of the bolt.

Hole Cleaning

Clear all dust and debris from the hole—stops impurities ruining the anchor hold.

Bolt Insertion

Fully assemble the bolt rod, expansion sleeve and other accessories, then insert the complete bolt set into the drilled hole, ensuring the sleeve is closely attached to the hole wall.

Locking

Tighten the nut clockwise with a wrench; the expansion sleeve expands evenly with the locking force and forms a firm anchor by tightly interlocking with the base surface.

Inspection

Gently pull the anchor screw after tightening to confirm a secure and non-loose connection, then proceed with the installation and fixation of subsequent brackets, equipment and other accessories.