Crosby® Shackle Warning Information

Round Pin Shackles can be used in tie down, towing, suspension or lifting applications where the load is strictly applied in-line. Round pin shackles should never be used in rigging applications to gather multiple sling legs or where side loading conditions may occur.

Screw Pin Shackles are used in Pick and Place* applications. For permanent or long-term installations, Crosby recommends the use of bolt type shackles. If you choose to disregard Crosby’s recommendation, the screw pin shall be secured from rotation or loosening. See page 212.
Screw pin shackles can be used for applications involving side-loading circumstances. Reduced Work Load Limits are required for side-loading applications. While in service, do not allow the screw pin to be rotated by a live line, such as in a choker application.
* Pick and Place application: Pick (move) a load and place as required. Tighten screw pin before each pick.

Bolt-Type Shackles can be used in any application where round pin or screw pin shackles are used. In addition, they are recommended for permanent or long term installations and where the load may slide on the shackle pin causing the pin to rotate. The bolt-type shackle’s secondary securement system, utilizing a nut and cotter, eliminates the requirement to tighten pin before each lift or movement of load.

QUIC-CHECK® INFORMATION

All Crosby Shackles, with the exception of 2160, 252 and 253 styles, incorporate markings forged into the product that address an easy to use QUIC-CHECK® feature. Angle indicators are forged into the shackle bow at 45 degree angles from vertical. These are utilized on screw pin and bolt type shackles to quickly check the approximate angle of a two-legged hitch or quickly check the angle of a single leg hitch when the shackle pin is secured and the pull of the load is off vertical (side loaded), thus requiring a reduction in the Work Load Limit of the shackle.
* Round Pin Shackles utilize the 45 degree QUIC-CHECK® indicators to ensure load is applied strictly in-line.

Screw pin shall be fully engaged.

If designed for a cotter pin, it shall be used and maintained.

Applied load should be centered in the bow to prevent side loading.

Multiple sling legs should not be applied to the pin.

If side loaded, the Work Load Limit shall be reduced according to Table 1 above.

Point loading of Crosby shackle pins is acceptable, as long as the load is reasonably centered on the pin.
A pad eye width of 80% or more of the shackle spread is the best practice.

Never place a sling eye over a fitting with a diameter or width greater than one half the natural length of the sling eye.

Folding, bunching or pinching of synthetic slings, which occurs when used with shackles, hooks or other applications will reduce the Work Load Limit.