Product Description
Overview
The SS-S4750 is a 4.75 tons, 3/4" nominal RIGPRO screw pin anchor shackle for fast rigging connections between slings, hoists, truss hardware, and load points. It uses a forged carbon steel body with a Dacromet-finished alloy pin, giving stage and event crews a marked, traceable connector that can be opened and redeployed quickly between builds.
Why It Matters
The 3/4" size is a useful step between smaller utility shackles and the heavier 1" bodies. It gives riggers a clear 4.75-ton choice when the connection needs more capacity without moving up to a larger, heavier shackle than the point actually requires.
Key Features
- 4.75 tons working load limit and 3/4" nominal size are permanently marked on the body, so the shackle can be checked before it is placed into the load path.
- Forged Carbon Steel construction with 6 times minimum ultimate-load ratio places this model in the correct strength family for its rated capacity.
- Screw pin design allows quick hand installation and removal, useful when the connection changes often during stage, rental, or production work.
- 3/4" nominal body gives a balanced mid-range connector for truss, sling, and hoist hardware that does not require the bulk of the larger sizes.
- DNV and ABS type approval, US Federal Specification RR-C-271D Type 4 A compliance, magnetic-particle crack detection, and 20,000-cycle fatigue rating support professional rigging inventory control.
Additional Technical Notes
- WLL Reduction: 0 % at 5°, 30 % at 45°, 50 % at 90° from centreline
- Quality Control: 100 % magnetic-particle crack detection
- Fatigue Rating: 20,000 cycles at 1.5 times WLL
- Marking: Size, WLL, and batch code permanently marked for certificate traceability
Applications
A practical fit for temporary stage rigging, truss pickups, motor points, wire rope sling connections, round sling connections, and rental-house kits where shackles are repeatedly inspected, installed, removed, and returned to inventory.
Compatibility
Use with rated slings, hoists, and anchorage hardware selected for the same or higher capacity; reduce working load limit for off-axis loading according to the catalog values, including 30 % reduction at 45° and 50 % reduction at 90° from centreline.
Frequently Asked Questions
Why use a screw pin shackle instead of the bolt-and-nut version
Screw pin shackles are faster to open and redeploy by hand, so they suit temporary rigs and rental workflows where the connection is checked and changed often.
Can I side load this if the bridle angle is not straight
Side loading reduces capacity. Follow the catalog reduction table, including 30 % reduction at 45° and 50 % reduction at 90° from centreline.
Is this the mid-size screw pin option in the range
Yes. It sits at 4.75 tons with a 3/4" nominal size, making it a practical middle choice before stepping up to the 6.5-ton and 8.5-ton models.