Product Description
Overview
The SS-S8500 is a 8.5 tons, 1" 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
At 1" nominal size, this shackle enters the large connector group where visual similarity can become risky. The SS-S8500 is the carbon-steel 8.5-ton screw pin model, so it should be chosen by the rigging calculation and verified against the body marking every time.
Key Features
- 8.5 tons working load limit and 1" 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.
- 1" nominal size overlaps visually with the SS-S12500, so the 8.5-ton WLL stamping is the key field check for this carbon-steel model.
- 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 same as the 12.5-ton 1" screw pin shackle
No. The SS-S8500 is the 8.5-ton carbon-steel model, while the SS-S12500 is the 12.5-ton alloy-steel model. Check the body marking before use.