Straining Screws

Product Dimensions

ParameterSpecification
Product TypeStraining Screw / Turnbuckle
End FittingsEye, Hook, Jaw (various combinations)
Size RangeM6 – M52 (custom sizes available)
Material OptionsStainless Steel, Mild Steel, Galvanized Steel
StandardsDIN 1480, ISO, BS
Surface FinishHot-dip Galvanized, Electro-Galvanized, Polished Stainless

Industrial Applications

  • Electrical Panels and Cable Systems: Maintain stress in cables and conductors with adjustable precision straining screws that deliver consistent control across electrical installations.
  • Marine and Shipbuilding: Use our high-strength straining screws designed to withstand challenging marine environments to secure rigging, ropes, and stay wires that are subjected to extreme weights and corrosion.
  • Construction Industry: Provide tensioning support for structural bracing, scaffolding, and suspension frameworks using construction straining screws rated for site-ready performance.
  • Fencing and Boundary Applications: Keep wire fences, boundary ropes, and barriers taut at all times with dependable structural tensioning screws suited to perimeter and boundary installations.
  • Aerospace and Defence Structures: For specialised tensile applications requiring maximum strength and durability, we also offer custom straining screw solutions developed to meet precise engineering specifications.

Product Description

Straining Screws, commonly referred to as turnbuckles, are tensioning devices used to regulate the length and tightness of connected assemblies. As a leading straining screw manufacturer, we produce these with a metal body with internal threads and two end fittings, either an eye, a hook, or a 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 galvanised 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

Related Products