9-Shape Foundation Anchor Bolts
9-shape foundation anchor bolts (also written 9-type or “9” bolts) have the embedded end bent into a closed loop that resembles the numeral 9. Compared with a simple L bend, the loop engages a larger volume of concrete and is much harder to straighten under pull-out load, making it a common choice for transmission towers, crane rails and heavy machine bases.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | GB / DIN / ASTM (made to drawing) |
| Type | 9-shape (closed loop) cast-in anchor bolt |
| Size Range | M12 – M36 (1/2" – 1-1/2") |
| Material | Carbon Steel Q235B / 35# / 45# / Alloy Steel |
| Surface Finish | Black Oxide, Zinc Plated, Hot Dip Galvanized, Plain |
| Loop Diameter | 60mm – 200mm (to drawing) |
| Supplied With | Hex nuts, washers, template plate (on request) |
| Customisation | Made to customer drawing, any loop size and length |
| MOQ | 500 pcs (standard), 2,000 pcs (custom) |
| Lead Time | 7-15 days (standard), 20-30 days (custom) |
| Packaging | Bulk cartons / Wooden pallets / Custom labeling |
Available Sizes
M12, M16, M20, M24, M30, M36 with total lengths 300mm – 1500mm
Applications
- Transmission tower foundations
- Crane rail and gantry fixing
- Heavy machine and press foundations
- Wind turbine base connections
- Industrial building columns
- Bridge bearing anchorages
Certifications
ISO 9001:2015 certified. Material certificates (EN 10204 3.1/3.2). RoHS and REACH compliant.
Frequently Asked Questions
What are 9-shape foundation anchor bolts used for?
Their J-like 9-shape hook gives excellent pull-out resistance when cast into concrete — typically for poles, posts, signage and light structures where the bolt must be anchored deep and loaded upward.
What sizes are available?
Available sizes range from M12 – M36 (1/2" – 1-1/2"). Contact us with your required sizes and quantities for a quick quote.
What is the MOQ and lead time?
The MOQ is 500 pcs (standard), 2,000 pcs (custom). Lead time is 7-15 days (standard), 20-30 days (custom). Mixed-size containers and larger orders are negotiable — send us your requirement for a quick quote.
Do you provide material certificates?
Yes. Material test certificates per EN 10204 3.1 are available on request, and our manufacturing is ISO 9001:2015 certified. RoHS and REACH compliance documentation can also be provided.
