High-Strength U-Type Shackle with Bolt and Nut
The high-strength U-type shackle is a mechanical connection fitting designed for overhead power transmission and distribution line assemblies. It is used to connect insulator strings, yoke plates, clevis fittings, eye fittings and tower attachment points while allowing controlled angular movement between the connected components.
The fitting consists of a high-strength U-shaped body, a transverse bolt or pin, a retaining nut and a cotter pin. This secured connection structure helps prevent the pin and nut from becoming loose during installation and service when correctly assembled according to the approved drawing and installation requirements.
Key Features
- High-strength U-shaped connection body
- Bolt, nut and cotter-pin retaining structure
- Designed for overhead-line fitting assemblies
- Suitable for suspension and tension insulator strings
- Hot-dip galvanized surface for outdoor corrosion protection
- Allows articulation between compatible line fittings
- Available in different dimensions and mechanical load classes
- Custom marking and export packaging available
Materials and Construction
The main U-shaped body and connecting bolt are manufactured from high-strength steel according to the approved product drawing. The fitting is normally supplied with a hot-dip galvanized surface for corrosion protection in outdoor environments.
The nut, cotter pin, steel grade, heat-treatment condition, thread specification and coating requirements must be confirmed according to the selected model and customer specification. Material grades must not be substituted without technical approval.
Product Function
The U-type shackle provides a detachable mechanical connection between compatible overhead-line fittings. Its U-shaped body can be connected to eye plates, yoke plates, tower attachment points and other fittings used in suspension or tension insulator assemblies.
The selected shackle must have compatible connection dimensions and a specified mechanical strength suitable for the complete fitting assembly. The allowable service load must be determined according to the project design and applicable safety factor.
Typical Applications
- Overhead transmission lines
- Overhead distribution lines
- Suspension insulator-string assemblies
- Tension and dead-end insulator-string assemblies
- Connection between yoke plates and eye fittings
- Tower and pole attachment assemblies
- Substation connection fittings where specified
Surface Treatment
The fitting can be supplied with a hot-dip galvanized coating. Coating thickness, coating mass, adhesion and inspection requirements are determined by the applicable standard, material thickness, project environment and purchase specification.
Enhanced galvanizing requirements can be considered for coastal, high-humidity or other corrosive environments after confirmation of the required coating specification.
Reference Standards
The fitting can be manufactured and inspected with reference to IEC 61284 for overhead-line fittings when specified in the purchase contract. Hot-dip galvanized coatings can be specified with reference to ISO 1461:2022 or the applicable customer and project standard.
Final compliance, inspection scope and acceptance criteria are determined by the confirmed model, approved drawing, applicable standard and agreed technical documentation.
Quality and Inspection
- Material and workmanship inspection
- Dimensional and connection compatibility verification
- Mechanical damage-load or failure-load testing when specified
- Hot-dip galvanized coating inspection
- Bolt, nut, thread and cotter-pin assembly inspection
- Marking, packaging and traceability verification
Information Required for Selection
To select the correct U-type shackle, please provide the required model, specified mechanical load, body dimensions, pin diameter, connection width, mating fittings, steel-grade requirement, galvanizing specification, applicable standard and project drawing.
Customization and Inquiry
JIUJIN POWER can supply U-type shackles according to approved drawings and project specifications. Contact us with your required model, mechanical load, dimensions, quantity and destination for technical confirmation and quotation.
