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Catalog provided courtesy of The Crosby Group, Inc.
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Page 342
 
  
General InspectionHook InspectionShackle Inspection
The inspection of fittings:

1. Initial, upon purchase
2. Frequent, prior to each use
3. Periodic, at least annually
More frequent inspection is required if type of service  requires it.  Records are not required by federal OSHA unless fittings are part of chain sling.

OSHA and ANSI allow 15% increase in throat opening of hooks, however  Crosby recommends that hooks be removed from service if any significant deformation exists.
Wear of hook is limited to 5%
in the two critical areas shown.

 
 
 
 Cracks can form if a properly made fitting is repeatedly overloaded.   A crack can form if non heat treated fittings are used in frequently cycled loads that are within the Working Load Limit.

 

 

 

Never modify a shackle by substituting the shackle pin.
Use only genuine Crosby  shackle pins with Crosby
Shackles.  All alloy shackles must have pins that are
marked with HT.

 

 

 

 

Any modification will mean that the Working Load Limit is no longer valid. The person modifying the fitting is responsible.
 
 
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