Wire Rope Thimbles
The "eye" of a wire rope assembly is its most vulnerable point. Without proper support, the loop can crush under load, or the wire strands can kink if bent too sharply. Wire Rope Thimbles are the solution. They act as a rigid steel liner inside the eye, maintaining the correct bend radius (D/d Ratio) and shielding the wire strands from abrasive contact with shackles, hooks, or pins.
Wire Rope Thimbles
Holloway Houston stocks a comprehensive inventory of Crosby thimbles, including Heavy-Duty, Solid, and Open Pattern configurations. Unlike light-duty commercial hardware, these thimbles are manufactured from hot-rolled steel and Hot Dip Galvanized to resist corrosion in harsh offshore and industrial environments.
Thimble Types & Applications
Heavy-Duty Wire Rope Thimbles (G-414) The industry standard for wire rope slings and winch lines. The G-414 offers a thicker steel section and deeper groove than standard "light duty" thimbles, providing superior resistance to deformation under heavy loads.
- Application : General purpose rigging, sling fabrication, and turnback eyes.
- Compliance : Meets Federal Specification FF-T-276b Type III.
- Popular Choice : Check the Crosby G-414 Heavy-Duty Thimble for sizes ranging from 1/4" to 2-1/4".
Solid Wire Rope Thimbles (S-412) Designed for applications where the mating pin size is critical and closely matches the thimble bore. Solid thimbles are cast (ductile iron) or machined, offering a rigid, non-collapsible eye.
- Application : Boom pendants, crane suspension lines, and connections to spelter sockets or shackles where movement must be minimized.
- Design : Provides a solid steel interface for the pin, eliminating the risk of the thimble collapsing.
- Popular Choice : Check the Crosby S-412 Solid Wire Rope Thimble for high-stress pendant lines.
Open Pattern Thimbles (G-408) Sometimes you need to install a thimble into a closed fitting (like a master link, eyebolt, or pad eye) where there is no opening to pass a standard thimble through. The G-408 features an "open" design that allows it to be slipped over the connecting hardware before the wire rope is spliced around it.
- Application : Connecting wire rope to fixed eyes, rings, or welded lugs.
- Popular Choice : Check the Crosby G-408 Open Thimble for retrofitting or restricted access terminations.
The Technical Advantage
Why is a thimble mandatory for permanent slings?
- D/d Ratio Protection : A wire rope loses strength if bent too sharply. A thimble forces the rope to maintain a generous curve radius, ensuring the termination retains its rated efficiency.
- Wear Shielding : When a sling connects to a shackle, friction occurs. A thimble ensures the steel hardware rubs against the thimble wall, not the expensive wire strands.
- Load Distribution : It prevents the loop from flattening or distorting, which would unbalance the load on the individual wire strands.
Capacity Range & Sizes
We stock thimbles to match every diameter of wire rope in our warehouse.
- Small Diameter : 1/4" to 3/8" for winch lines and utility cables.
- Standard Rigging : 1/2" to 1-1/2" for standard industrial slings.
- Heavy Lift : Large bore G-414 thimbles up to 2-1/4" for heavy marine construction.
Technical Specifications & Compliance
- Standard : Meets requirements for wire rope sling fabrication under ASME B30.9.
- Material : G-414 (Rolled Steel), S-412 (Ductile Iron).
- Finish : Hot Dip Galvanized for superior corrosion protection (Standard on G-414 and G-408).
HHI Rigging Services
We are a full-service rigging shop.
- Sling Fabrication : We can professionally swage these thimbles into Wire Rope Slings using our 3,000-ton presses.
- Inspection : Our team can inspect used slings to check for thimble deformation, cracks, or erosion, common signs of overload or wear.
Complete Your Assembly
A thimble needs a termination to hold it in place. Pair these with Crosby S-505 Swaging Sleeves for a permanent splice, or use Crosby G-450 Wire Rope Clips for a field-installable eye. Connect the finished eye to your load using Crosby G-2130 Shackles or G-320 Sling Hooks.
Browse our inventory below to filter by Thimble Type and Wire Rope Size.