The Hex Bolt Sleeve Anchor Expansion Bolt (commonly known as a hex nut sleeve anchor, concrete expansion shield, expansion anchor bolt, or heavy-duty masonry sleeve anchor) is a pre-assembled mechanical anchoring fastener engineered for heavy-duty structural attachments into solid concrete, brickwork, stone, and hollow block masonry. Comprising a threaded stud with a forged conical end, a pre-slotted cylindrical expansion sleeve, a heavy flat washer, a spring lock washer, and a standard hex nut, tightening the hex nut draws the cone wedge up into the sleeve. This expands the sleeve outward against the drilled hole walls to form an indestructible mechanical interlock, adhering fully to global ISO standards.
Technical Specifications of Hex Bolt Sleeve Anchor Expansion Bolts
We supply sleeve expansion anchors in carbon steel (Class 4.8 / Class 8.8) with Electro-Zinc Plating (EG) or Hot-Dip Galvanizing (HDG), as well as austenitic stainless steel (SS304/A2 and SS316/A4) for high-moisture marine and chemical environments.
| Anchor Type & Material | Tensile & Shear Capacity | Sleeve Construction | Corrosion Protection Level | Primary Installation Target |
|---|---|---|---|---|
| Electro-Zinc Plated Carbon Steel | Class 4.8 / 8.8 High Pull-Out Strength | Stamped Cold-Rolled Carbon Steel Sleeve | 5 µm – 12 µm Electro-Zinc (Blue-White / Yellow) | Indoor Structural Steel & Equipment Mounting |
| Hot-Dip Galvanized (HDG) Carbon Steel | Class 4.8 / 8.8 Heavy Load Capacity | Heavy-Gauge Zinc Coated Steel Sleeve | 45 µm – 65 µm Molten Hot-Dip Zinc Coating | Outdoor Cable Trays, Guardrails & Substation Anchoring |
| Stainless Steel A2 (SS304) | A2-70 Grade Mechanical Anchor | Austenitic SS304 Slotted Sleeve | Acid Passivated Clean Natural Finish | Exterior Curtain Walls & Plumbing Bracket Fastening |
| Stainless Steel A4 (SS316) | A4-80 Grade Heavy Industrial Anchor | Molybdenum-Alloyed SS316 Sleeve | Electropolished Superior Salt Spray Protection | Marine Infrastructure & Chemical Plant Anchorage |
Precision Manufacturing and Working Mechanics
At our specialized manufacturing plant in Handan, China, hex bolt sleeve anchors are produced using cold heading formers, sleeve stamping presses, and automated assembly lines:
- Precision Cone Bolt Cold Heading: Multi-station cold heading formers forge steel wire into exact conical wedges and clean metric threads with tight diameter tolerances.
- Automated Sleeve Stamping & Slotting: High-speed stamping presses roll strip steel into smooth expansion sleeves, punching clean expansion slots for uniform 360-degree radial expansion.
- Galvanizing & Chemical Passivation: Carbon steel components undergo electro-zinc plating or molten hot-dip galvanizing, while stainless steel components are passivated to eliminate surface free iron.
- 100% Automated Pre-Assembly: Cone bolts, sleeves, flat washers, spring washers, and hex nuts are pre-assembled on automated lines to ensure hassle-free site installation.
Key Engineering Applications of Hex Sleeve Expansion Anchors
Hex bolt sleeve anchors are widely specified across structural engineering and MEP installations:
- Building Curtain Wall & Steel Framing Baseplates: Securing aluminum curtain wall brackets, glass facade channels, and structural steel column baseplates into concrete slabs.
- MEP, Cable Tray & HVAC Duct Anchoring: Fastening heavy electrical cable tray supports, air conditioning duct hangers, and pipeline brackets to ceilings and masonry walls.
- Heavy Machinery & Warehouse Racking Base Fixing: Anchor industrial conveyor frames, warehouse pallet racking uprights, and heavy machine tools to factory concrete floors.
Quality Assurance and Export Packaging for Sleeve Anchors
Handan YiHao Fastener enforces strict Quality Assurance (QA) standards for all overseas export orders. Testing procedures include 100% concrete pull-out tension tests, shear load testing, sleeve expansion consistency verification, and salt spray corrosion validation.
All export items are bulk packed in heavy-duty 25kg inner cartons, neatly stacked on ISPM 15 compliant fumigated wooden pallets, and wrapped in protective stretch film for safe ocean freight.
Request Factory Direct Pricing for Hex Bolt Sleeve Anchors
Looking for a trusted manufacturer in Handan, China for carbon steel or stainless steel hex bolt sleeve anchors & expansion bolts (Zinc Plated, HDG, SS304, SS316)? Contact Handan YiHao Fastener today for technical datasheets, concrete pull-out load test reports, free samples, and direct bulk export quotes.
