Expanded Coil Ferrule Inserts

Features of Expanded Coil Ferrule Inserts

• Higher Quality Expanded Coil Ferrule Inserts:

  High-Strength Design That Maximizes Concrete Bonding

  
  

  The Expanded Coil Ferrule Insert achieves its high capacity through a carefully engineered anchorage system. Shaped steel struts — two, four or six depending on the model — spread the load over a wide area, while the expanded wire coil interlocks with the surrounding concrete and enlarges the effective shear-cone surface. The result is an insert that transfers tension and shear forces efficiently and predictably, even under demanding site conditions.

  
  

  Construction & Working Principle

  
  

  Each insert is a factory-assembled anchor consisting of an NC (UNC) threaded ferrule, shaped high-strength steel struts and an expanded wire coil. The threaded ferrule provides a precise, durable thread for standard coil bolts and lifting hardware, while the struts carry the load deep into the concrete mass and provide reliable mechanical interlock. The expanded wire coil further broadens the effective shear-cone surface area — the key feature that enables higher rated capacities than conventional ferrule inserts of similar size.

  
  

  Depending on the required load, users can select a two-strut model for general connections, a four-strut model for heavy structural attachments, or a six-strut model for the most demanding applications. Every model is load-tested, with published capacities based on 3,000 psi / 145 pcf concrete and a 1/2" insert setback from the concrete surface. For rated performance, installers should observe the minimum edge and corner distances shown in the specification table and keep spacing at no less than twice the corner distance.

  
  

  Proven in Structural Connections, Bracing and Lifting

  
  

  The Expanded Coil Ferrule Insert is built for the wide range of loads found in precast production: attaching structural steel to walls, columns and beams, temporary bracing during erection, pipe and mechanical equipment supports, and cast-in connection points for transport or site assembly. With four bolt diameters from 3/4" to 1-1/2" and safe working loads up to 18,680 lb, one product family covers applications from light attachments to heavy structural connections.

  
  

   Manufacturing Quality & Customization You Can Rely On

  
  

  Every insert is manufactured from quality steel with tight dimensional control, so the ferrule thread, strut alignment and overall profile are consistent from piece to piece and batch to batch. The standard galvanized finish provides dependable corrosion protection for cast-in service, and all models carry a 3:1 safe working load factor, with capacity data documented from mechanical testing for specification and audit purposes.

  
  

  HULK Metal also supports customization to match project requirements: alternative ferrule thread sizes, custom embedment depths, or modified strut configurations can be produced against your drawings, with samples available before volume production. Each part number is traceable through production records, allowing repeat orders to maintain the same geometry, finish and performance. Whether you are standardizing a single insert size across your plant or engineering a solution for a specific connection detail, our team works from verified load charts and installation guidance so the delivered product matches the design intent.

  
  

  You can get free samples to check whether they can meet the requirements.

  Get Free Samples
• Expanded Coil Ferrule Inserts With Shorter Lead Time:

  

  The Expanded Coil, Ferrule Insert is a highstrength, highly versatile insert available for 

  numerous precast concrete applications. It is 

  available in 3/4”, 1”, 1-1/4” and 1-1/2” bolt 

  diameters. The insert is constructed with a NC 

  threaded ferrule, shaped struts (two, four or six 

  depending on model) and an expanded wire coil. 

  This efficient design increases the shear cone 

  surface area thus increasing the load capacity of 

  the insert.

  Plated inserts are not designed for use with hot dip galvanized bolts.

  Table is based on 3,000 psi and 145 pcf concrete.

  Inserts must be set back 1/2” from concrete surface.

  Below capacities are based upon mechanical testing and available industry data.

  Minimum spacing of inserts is 2 x (corner distance).

  
  

  You can get a solution with shorter order delivery times and guaranteed quality and quantity.

  Get Your Free Solution
• Expanded Coil Ferrule Inserts with Better Service:

  Engineering-Led Selection Support

  
  

  help you match bolt size, strut configuration and edge distances to your actual loads, using verified capacity charts so specifications are correct from the first order.

  
  

  Fast Sampling & Customization

  
  

  Need a different ferrule depth, thread size or finish? We support OEM modifications with quick drawings, samples and qualification testing before production begins.

  
  

  Reliable Batch Production & QC

  
  

  Dedicated production lines keep lead times short, while material certificates and capacity documentation accompany every batch for full traceability.

  
  

  Export-Ready Packaging & Logistics

  
  

  Inserts are protected and clearly labeled for long-distance shipment, with delivery documentation and customs paperwork handled by our export team.

  
  

  You can benefit from the comprehensive services of a dedicated client team.

  Contact Your Dedicated Service Team
• Cost-controllable Expanded Coil Ferrule Inserts:

  Expanded Shear-Cone Anchorage for Higher Capacity

  
  

  The expanded wire coil and shaped struts enlarge the load-bearing surface inside the concrete, so heavier connections can be designed with fewer inserts and greater layout freedom than comparable plain ferrule solutions.

  
  

  Tested, Predictable Safe Working Loads

  
  

  Every model carries a 3:1 safety factor with capacities verified by mechanical testing. Clear edge, corner and spacing rules let engineers specify with confidence and avoid field failures.

  
  

  One Product Family Covers Light to Heavy Connections

  
  

  From 3/4" to 1-1/2" bolt sizes and safe working loads from 5,890 lb to 18,680 lb, a single supplier covers everything from simple attachments to the heaviest structural connections, simplifying purchasing and inventory.

  
  

  You can leave a request and get a more suitable quotation.

  Get a Better Quotation