According to ASME B30.26 Rigging Practices section, it is required that screw pin threads are fully engaged and tight, and the pin shoulder is in contact with the shackle body. So hand tight usually is sufficient for both screw pin and bolt type shackles. If a cotter pin is supposed to be there, it should be there.

This question does come with some controversy, though. There is an old practice of tightening a screw pin shackle, so it is hand-tight and then backing it off an eighth to a quarter of a turn. The idea was that a screw pin would often tighten further when the load was applied. This can make it difficult to unscrew and remove the pin without using tools after the lift. The theory was starting a lift with a loose pin would eliminate the need for tools to remove the shackle. THIS IS AN UNSAFE PRACTICE.

We must always abide by the lifting product manufacturer’s instructions for product usage. A loose pin has NEVER been condoned by shackle manufacturers. If the shackle pin is loose to start with, it can further loosen during use. This can be dangerous and create a potential hazard.

As a note to ASME B30.26, the threads must be fully engaged, shoulder to body. Most users interpret this as hand tight without needing a tool to further tighten the pin. However, to achieve that requirement, for some shackles, especially larger ones or new ones that may have paint on the threads, it may be necessary to use a tool to tighten the pin.

Watch the full Toolbox Talk on shackles here:
[ Ссылка ]

Want to learn more about shackles? Check out these FREE downloads, articles, and videos!
_____________________________________________
FREE DOWNLOADS
Shackle Markings Identification Guide:
►[ Ссылка ]

Shackles at a Glance:
►[ Ссылка ]

Rigging Gear Inspection Field Reference Guide:
►[ Ссылка ]

Lifting & Rigging Best Practices Guide:
►[ Ссылка ]
_____________________________________________
Articles & Videos:
Different Types of Shackles: Anchor vs. Chain and Screw Pin vs. Bolt Type
►[ Ссылка ]

ASME B30.26 Shackle Inspection Requirements & Best Practices for Use
►[ Ссылка ]

How Do I Properly Tighten the Screw Pin on an Anchor Shackle?
►[ Ссылка ]

What is a Good Wire Rope to Shackle Ratio to Prevent Damage?
►[ Ссылка ]

Looking for more Toolbox Talks? Check out the playlist!
►[ Ссылка ]
_____________________________________________
Schedule Remote or In-Person Rigging Training Here:
► [ Ссылка ]

Contact Mazzella's Rigging Division Here:
► [ Ссылка ]
_____________________________________________
Legal Disclaimer: Any advice, graphics, images, and/or information contained within this YouTube Channel or on any embedded videos, are presented for general educational and information purposes and to increase overall safety awareness. It is not intended to be legal, medical, or other expert advice or services, and should not be used in place of consultation with appropriate industry professionals.
The information contained on this YouTube Channel should not be considered exhaustive and the user should seek the advice of appropriate professionals.

свернуть