Turnbuckles
We supply a comprehensive range of galvanised turnbuckles for tensioning, rigging, and structural applications. Our turnbuckles are manufactured from drop-forged high tensile steel (SAE 1035 or 1045) with hot dipped galvanised finish for superior corrosion resistance. Available in both commercial grade (DIN1480) and load-tested grade (ASTM F1145-92) with full certification. We stock over 15 different turnbuckle configurations including standard strainers, tested turnbuckles, and premium fork-type assemblies for wire rope and chain applications.
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Turnbuckle Types Gallery
Browse our comprehensive range of galvanised and stainless steel turnbuckles. Available in multiple configurations for various tensioning applications.
Turnbuckles
Galvanised Turnbuckles
Technical Specifications
| Material | High tensile steel SAE 1035/1045 (drop forged) |
| Finish | Hot dipped galvanised to BS EN ISO 1461 |
| Size Range | M6 - M24 (larger sizes on request) |
| End Fittings | Eye, Jaw, Hook configurations |
| Grades | Commercial (DIN1480), Tested (ASTM F1145-92) |
| Safety Factor | 5:1 (MBL = 5 × WWL for tested grade) |
| Thread Standard | Metric coarse thread (ISO 261) |
| Standards | DIN1480, ASTM F1145-92, EN 10266 |
| Temperature Range | -20°C to +200°C |
| Certification | Test certificates with batch numbers |
Turnbuckle Types & Specifications
We stock a comprehensive range of galvanised and stainless steel turnbuckles. Select the appropriate type based on your end fitting requirements and load rating needs.
| Turnbuckle Type | Description | Size Range |
|---|---|---|
| Eye & Eye Tested Turnbuckles | Load-rated turnbuckle with eye fittings both ends. ASTM F1145-92 compliant. | M6 to M24 |
| Eye & Eye DIN1480 Strainers | Commercial grade strainer with eye fittings. For non-critical applications. | M6 to M24 |
| Eye & Eye Commercial Strainers | Economy grade strainer for general tensioning applications. | M6 to M20 |
| Jaw & Jaw Tested Turnbuckles | Load-rated turnbuckle with clevis jaw fittings. For shackle connections. | M6 to M24 |
| Hook & Eye Tested Turnbuckles | Load-rated turnbuckle with hook one end, eye other end. | M6 to M24 |
| Hook & Eye DIN1480 Strainers | Commercial grade with hook and eye combination. | M6 to M20 |
| Hook & Eye Commercial Strainers | Economy grade hook and eye strainer for temporary rigging. | M6 to M16 |
| Hook & Hook Commercial Strainers | Quick connection strainer with hooks both ends. | M6 to M16 |
| Hook & Hook DIN 1480 Strainers | Commercial grade with hooks for rapid deployment. | M6 to M20 |
| Stainless Steel Eye & Eye Turnbuckles | Corrosion-resistant SS316 turnbuckles for marine environments. | M5 to M12 |
| Stainless Steel Jaw & Jaw Turnbuckles | SS316 jaw type turnbuckles for marine and chemical applications. | M5 to M12 |
| Stainless Steel Hook & Eye Turnbuckles | SS316 hook and eye combination for marine rigging. | M5 to M12 |
| Stainless Steel Hook & Hook Turnbuckles | SS316 hooks both ends for temporary marine connections. | M5 to M12 |
| Premium Fork & Fork Turnbuckles | High-strength fork terminals for wire rope swaging. | 3mm to 12mm wire |
| Premium Fork & Jaw Turnbuckles | Fork one end, jaw other end for mixed connections. | 3mm to 12mm wire |
Tested Grade
For lifting and critical structural applications.
MBL = 5 × WLL. Test certificates provided. Meets ASTM F1145-92.
Commercial Grade
For general tensioning and non-critical applications.
DIN1480 standard. Suitable for fencing, bracing, and guy wires.
Stainless Steel
For marine and corrosive environments.
SS316 construction. Superior corrosion resistance for harsh conditions.
Applications
Frequently Asked Questions
What is the difference between tested and commercial turnbuckles?
Tested turnbuckles are load rated with a Minimum Breaking Load (MBL) of 5 times the Working Load Limit (WWL) and meet ASTM F1145-92 standards. They come with test certificates and are suitable for lifting and critical structural applications. Commercial turnbuckles (DIN1480) are suitable for general tensioning applications where load rating is not critical, such as fencing or bracing.
Which turnbuckle configuration should I use?
Eye & Eye: Best for permanent installations with shackles. Jaw & Jaw: Ideal for connecting to eye bolts or shackles without rotating. Hook & Eye: Versatile - quick connection on hook end, permanent on eye end. Hook & Hook: For temporary setups requiring quick connections on both ends.
How do I calculate the required turnbuckle size?
Select a turnbuckle with a Working Load Limit (WLL) equal to or greater than the maximum expected load. For tested grade, WLL = MBL ÷ 5. Always consider dynamic loads, shock loading, and angle factors. When in doubt, choose the next size up.
Can turnbuckles be used for lifting?
Only tested grade turnbuckles meeting ASTM F1145-92 or equivalent should be used for lifting. Commercial grade turnbuckles are not rated for lifting applications. Always verify the WLL and ensure it exceeds your load requirement with appropriate safety factors.
How do I prevent turnbuckles from loosening under vibration?
Use lock nuts (jam nuts) on the threaded body, wire the turnbuckle body to the end fittings, or use thread-locking compound. For critical applications, use turnbuckles with locking systems or cotter pins through the end fittings.
What is the difference between galvanised and stainless steel turnbuckles?
Galvanised turnbuckles are hot-dip zinc coated carbon steel, offering good corrosion resistance at lower cost for outdoor and marine applications. Stainless steel (SS316) turnbuckles provide superior corrosion resistance for harsh marine or chemical environments but at higher cost.
