Straining Screw
Straining Screws, also known as turnbuckles, are robust mechanical devices designed to adjust the tension and length of ropes, cables, tie rods, and structural wire systems. They feature threaded eye, hook, or jaw ends that allow easy tightening and loosening with precision.
| Parameter | Specification |
|---|---|
Product Type |
Straining Screw / Turnbuckle |
End Fittings |
Eye, Hook, Jaw (various combinations) |
Size Range |
M6 – M52 (custom sizes available) |
Material Options |
Stainless Steel, Mild Steel, Galvanized Steel |
Standards |
DIN 1480, ISO, BS |
Surface Finish |
Hot-dip Galvanized, Electro-Galvanized, Polished Stainless |
Industrial Applications
Straining Screws are widely used in:
- Electrical panels and cable systems: Maintain tension in cables and conductors with adjustable precision.
- Marine and shipbuilding: Secure rigging, ropes, and stay wires subjected to heavy load and corrosion.
- Construction industry: Provide tensioning support for structural bracing, scaffolding, and suspension frameworks.
- Fencing and boundary applications: Keep wire fences, boundary ropes, and barriers taut at all times.
- Aerospace and defense structures: Employed in specialized tensile applications for strength and durability.
Product Description
Straining Screws, commonly referred to as turnbuckles, are tensioning devices used to regulate the length and tightness of connected assemblies. They consist of a metal body with internal threads and two end fittings—either eye, hook, or jaw—that rotate to increase or decrease tension. Noted for their reliability and easy adjustability, these screws are suitable for both heavy-duty industrial projects and light-duty installations. Depending on application environments, they are available in several finishes, including galvanized coatings for outdoor use and stainless steel for superior corrosion resistance.
Product specifications
- Product Body: Cylindrical or elongated frame with left-hand and right-hand threads
- End Variants: Eye–Eye, Hook–Hook, Jaw–Jaw, and mixed combinations (Eye–Hook, Eye–Jaw, etc.)
- Size Range: Metric sizes from M6 to M52; custom threading on demand
- Material Options: Stainless steel (AISI 304, AISI 316), mild steel, carbon steel, galvanized steel
- Thread Type: Metric (ISO standard) or UNC/UNF on request
- Load Capacity: Varies by size—can range from 500 kg to 15,000 kg working load limit
- Surface Finish: Hot-dip galvanizing, electro-galvanizing, polished stainless steel, or zinc plating
- Mechanical Strength: High tensile strength compliant with DIN 1480 and ISO standards
- Operating Temperature: -40°C to +400°C (material-dependent)
- Corrosion Resistance: Excellent in stainless steel variants; enhanced with protective coatings for outdoor use
- Applications in Safety: Suitable for both static load bearing and dynamic tensioning
- Standards/Compliance: DIN 1480, ISO, BS standards available; CE compliance for select applications
- RoHS/REACH Compliance: Available for stainless steel and coated versions
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