Coil Bolts

Features of Coil Bolts

• Higher Quality Coil Bolts:

  Precision Coil Thread for Fast, Reliable Engagement

  
  

  CB1, CB2 and CB3 coil bolts are machined with a fast-acting, self-cleaning coil thread that engages HULK Metal coil inserts smoothly and without binding. The thread profile sheds concrete dust and debris as the bolt is driven, so bolts seat consistently even after repeated use in precast yards. Precise thread tolerances keep the bolt firmly seated against the insert socket, which helps maintain the rated capacity of the connection.

  
  

  Load Transfer and Rated Capacity

  
  

  Every HULK Metal coil bolt is rated with a 5:1 safety factor, meaning the ultimate strength is at least five times the published safe working load. Reference SWL values for tension range from about 4,500 lb for the CB1 (3/4") bolt to more than 13,000 lb for the CB3 (1-1/4") bolt when used with a suitable HULK Metal coil insert. These ratings assume full thread engagement, sufficient coil penetration into the insert, and a 1/2" setback of the insert from the concrete surface in 3,000 psi normal-weight concrete. 

  
  

  Actual capacity also depends on concrete strength, edge distance, anchor spacing and the specific insert selected, so the governing value must be taken from the HULK Metal data sheet. Lifting batches are proof-loaded to the rated safety factor before dispatch, and batch test reports are available with the shipment. Never exceed the rated load, and remove any bolt that shows thread damage, distortion or heavy corrosion.

  
  

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

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• Coil Bolts With Shorter Lead Time:

  CB1 Coil Bolts

  
  

  Coil bolts are manufactured with a fast threading, self-cleaning coil thread. Coil bolts are available in 1/2” and 3/4” sizes, as listed below.

  All data is based on a 5:1 SWL for lifting applications. Safety factor can be adjusted to a 3:1 SWL for connections by multiplying the published loads by 5, then dividing by 3.

  Above tension capacities based upon mechanical testing using 1 x CN-25 coil nut.

  For coil insert applications proper bolt length must be calculated using“Coil Insert Safety Information and Bolt Selection”criteria.

  Shear capacities based upon no eccentricity

  Coil Bolts available in electroplated finish. Add a “P” at the end of the part number to designate electroplated finish.

  Coil thread manufactured per specification.

  
  

  CB2 Coil Bolts

  
  

  CB-14W coil bolts are manufactured with a fast threading, self-cleaning coil thread. 

  Coil bolts are fabricated by welding a CN-13 coil nut to the top of a CR-12 coil rod. 

  These bolts are typically used for forming or other applications that do not require the full capacity of the coil rod.

  Shear capacities based upon no eccentricity

  Tension capacity reduced due to use of CN13 Coil Nut

  For coil insert applications, proper bolt length must be calculated using“Coil Insert 

  Safety Information and Bolt Selection”criteria

  
  

  CB3 Coil Bolts

  
  

  CB-14WH coil bolts are manufactured with a fast threading, self-cleaning coil thread. Coil bolts are fabricated by welding a CN-25 coil nut to the top of a CR-12 coil rod. These bolts are typically used for Lifting or other applications that require the full capacity of the coil rod.

  Shear capacities based upon no eccentricity

  Tension capacity reduced due to use of CN13 Coil Nut

  For coil insert applications, proper bolt length must be calculated using “Coil Insert 

  Safety Information and Bolt Selection” criteria

  
  

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

  Get Your Free Solution
• Coil Bolts with Better Service:

  Custom Manufacturing and OEM

  
  

  Custom diameters, lengths, head styles and finishes can be produced to drawings. HULK Metal supports OEM production with sample approval before mass runs.

  
  

  Factory Quality Control

  
  

  Coil bolts pass thread and dimensional inspection before dispatch, and lifting batches are proof-loaded to the rated safety factor, with test reports available on request.

  
  

  Flexible Packaging and Delivery

  
  

  Choose carton, wooden case, palletized or bulk packaging and ship by sea, air or land. Freight consulting keeps mixed orders and delivery schedules on track.

  
  

  Technical Support

  
  

  Engineers help with coil bolt and insert selection, load rating, penetration depth and installation practice for your element and lifting plan.

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

  Contact Your Dedicated Service Team
• Cost-controllable Coil Bolts:

  Load Ratings You Can Plan Around

  
  

  CB1, CB2 and CB3 cover 3/4" to 1-1/4" coil thread sizes with published SWL figures at a 5:1 safety factor. Proof-tested batches and clear documentation make lifting calculations straightforward.

  
  

  Fast Engagement, Less Downtime

  
  

  Self-cleaning coil threads drive in quickly and seat consistently, so crews spend less time on rigging and fewer bolts are rejected on site. Smooth fit also reduces wear in the insert socket.

  
  

  One Matched System, Lower Risk

  
  

  Coil bolts engineered as a matched set with HULK Metal coil inserts remove the thread-fit uncertainty that comes from mixing brands. Batch test reports and engineering support keep quality traceable.

  
  

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

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