Fang Bolts

Fanged Elevator Bolts

The fanged elevator bolt is characterized by two sharp teeth that are intended to penetrate the carcass of the elevator belt. Once the teeth penetrate the belt, they help keep the bolt from spinning which easily allows the lock nut to be tightened.

FANG elevator bolts
Product Features: 
  • Steel Unique Design - Fangs lock elevator bolt in place while nut is tightened
  • Large bolt head diameter
  • Flat bolt head - reduces risk of rip out of bolt
  • Extensively tested and used in USA grain industry
  • Suitable for recessed or non recessed holes
  • Bolt types: M6, M8, M10
Head Diameter
Max. Torque
Package Quantity
Package Weight
M6 x 201/4 x 3/4*25111001.56
M6 x 251/4 x 125111001.82
M8 x 255/16 x 1*30271002.76
M8 x 305/16 x 1-1/430271003.02
M8 x 405/16 x 1-1/230271003.24
M10 x 303/8 x 1-1/435371004.90
M10 x 353/8 x 1-1/335371005.12
M10 x 403/8 x 1-1/235371005.34
M10 x 453/8 x 1-3/435371005.56

Standard zinc plated; self colour and stainless options on request.

Elevator Bolt Hardware - Nuts, Washers & Spacers

Along with the various types and sizes of elevator bolts, 4B offers all of the hardware required for each fastener.         
For more information on all elevator bolt hardware specifications, see page 5 of our full bolt catalogue by clicking the link below.

More info

Is the installation of fang bolts any different to other elevator bolts?

Fanged bolts are a little more unique than other elevator bolts.  Install fanged bolts with fang tips in-line across the  
  width of the belt.  Placing the fangs in such a manner minimizes stresses caused by the flat head going  
  around the curved pulley.  Set the fangs into the belt cover by tapping them with a mallet.  Once the bolt is tightened, the  
  fangs will draw up into the belt and the head will seat properly.

FAQ - Elevator Bolts

How long of an elevator bolt do I need?  
  When installing buckets on an elevator belt, use this simple formula:  
  (belt thickness + bucket back thickness + washer thickness + nut thickness + 1/4 inch)  
What grade are 4B elevator bolts?  
  4B elevator bolts meet or exceed ISO Grade 5.8 / SAE Grade 2 standards.  The bolt grade guide below is for bolt diameters of 6mm (1/4") to 12mm (1/2"):  

ISO Grade SAE Grade Min. Tensile Strenghth (psi)
5.8 2 74000
8.8 5 120000
10.9 8 150000

What torque setting should I use?  
  An ideal installation will result in the elevator bolt head fitting snuggly just below the surface of the belt after tightening (Image B).  However, never exceed the maximum recommended torque as shown in the tables below:  

Bolt Dia. in. lbs. ft. lbs. nm
M6 72 6 8
M7 115 10 13
M8 168 14 19
M10 336 28 38
M12 588 49 66


bolt dia. in. lbs. ft. lbs nm
1/4" 72 6 8
5/16" 156 13 18
3/8" 276 23 31
1/2" 684 57 77


How do you install an elevator bolt?  
  The head of the elevator bolt should lie against the inside surface of the elevator belt with the nuts and washers on the inside of the elevator bucket.  An ideal installation will result in the elevator bolt head fitting snuggly just below the surface of the elevator belt.    

  Do you have any maintenance recommendations?  
  After initial installation, it is recommended that the bucket elevator be run for approximately four hours.  After which the bolts should be re-tightened to ensure that there are no loose parts.  Periodic inspections are always recommended to  check for any issues that may occur during the life of the elevator, including checks for loose or damaged elevator bolts.  

Bucket Elevator Design Service

Bucket Elevator Design Service

At 4B, we have designed hundreds of bucket elevators for all industries, including Animal Feed, Grain Handling, Flour Milling, Malting & Brewing through to Cement, Coal and other heavy industries.

Take advantage of 4B's free, guaranteed worldwide technical support service from a team of engineers specialising in the design and calculation of bucket elevators.. Using your key technical data, our engineers can give you a detailed technical recommendation for the ideal bucket elevator with the ideal capacity and discharge characteristics. We can either design your new bucket elevator or we can help you to increase the capacity of your existing bucket elevator.

To get a free bucket elevator calculation

Please fill this form in as accurately as possible to allow us to deal with your enquiry more effectively. 

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Elevator Bolts Catalogue

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