Hot-Dip Galvanized EB-Type Tower Attachment Clevis
The EB-type tower attachment clevis is a mechanical link fitting used to connect suspension or tension insulator-string hardware to an attachment point on an overhead transmission tower. Its single-eye end connects with a compatible shackle, link plate or tower fitting, while the transverse bolt connection accommodates the adjoining hardware component.
The fitting consists of a forged or formed steel body, transverse clevis bolt, hex nut and retaining cotter pin. Its compact configuration transfers mechanical loads through the hardware string while allowing the assembly to be installed, inspected and removed using standard bolted connections.
The steel body and main fasteners are normally protected by hot-dip galvanizing for outdoor transmission-line service. The retaining cotter pin may be manufactured from stainless steel or another corrosion-resistant material according to the approved drawing.
Important: Model designations, coupling dimensions and specified failure loads must be confirmed against the manufacturer’s approved drawing and mechanical test report. Product markings visible in a photograph must not be treated as complete performance certification.
Key Features
- Designed for tower-side connection of insulator and line-hardware strings
- Single-eye upper connection with transverse bolt-type lower connection
- Includes clevis bolt, hex nut and retaining cotter pin
- Forged, formed or cast steel construction according to the product design
- Hot-dip galvanized surface for outdoor corrosion protection
- Multiple coupling dimensions and mechanical-strength classes available
- Suitable for suspension and tension hardware assemblies
- Dimensions, material, marking and packaging can be customized
Typical Technical Specifications
| Product Type | EB-Type Tower Attachment Clevis |
|---|---|
| Fitting Category | Link Fitting / Tower Attachment Fitting |
| Connection Configuration | Single Eye to Transverse Bolt Clevis |
| Representative Models | EB-10/12-100 and EB-12/16-100, subject to marking confirmation |
| Main Body Material | Carbon steel or alloy steel according to the approved drawing |
| Bolt and Nut Material | Carbon steel or alloy steel |
| Retaining Pin | Stainless steel or corrosion-resistant steel |
| Surface Finish | Hot-dip galvanized |
| Manufacturing Process | Forging, forming, casting and machining according to product design |
| Application | Transmission-tower attachment and insulator-string connection |
| Installation | Mechanical connection using bolt, nut and retaining cotter pin |
| Customization | Model, dimensions, hole diameter, bolt size, strength class, coating, marking and packaging |
No dimensional or load value should be published until it has been verified against the approved product drawing and mechanical test documentation.
Product Construction
Single-Eye Connection
The elongated single-eye section provides a connection point for a compatible tower fitting, shackle or link plate. The eye diameter, body thickness and edge distance must match the adjoining component and the required mechanical load.
Bolt-Type Clevis Connection
The opposite end incorporates a transverse bolt connection. The bolt passes through the adjoining hardware component and is secured with a hex nut. A cotter pin prevents unintended loosening or complete withdrawal of the fastener.
Load-Bearing Body
The fitting body transfers tensile and articulated mechanical loads between the tower and the insulator-string assembly. The selected model must provide the required coupling geometry, movement clearance and specified failure load.
Applications
- Overhead transmission-line towers
- Suspension insulator strings
- Tension and strain insulator strings
- Tower-side hardware assemblies
- Substation gantry and bus-support connections
- High-voltage line renovation and replacement projects
Selection and Installation
- Confirm the required model, coupling dimensions and specified failure load.
- Check that the eye and bolt dimensions match the adjoining hardware.
- Inspect the body, connection eye, bolt, nut and cotter pin before installation.
- Insert the mating hardware into the clevis connection without forcing or modifying the fitting.
- Install the transverse bolt and tighten the nut according to the approved installation procedure.
- Insert and correctly secure the retaining cotter pin.
- Verify that the connected components have adequate articulation clearance.
- Inspect the completed assembly for interference, deformation and damaged galvanizing.
Do not weld, drill, grind or heat the fitting at the installation site unless the modification is specifically authorized by the project engineer and manufacturer.
Quality Inspection
- Raw-material and material-certificate verification
- Dimensional and coupling-fit inspection
- Visual inspection for cracks, laps and harmful surface defects
- Bolt, nut, thread and cotter-pin assembly inspection
- Hot-dip galvanized coating appearance and thickness inspection
- Mechanical tensile or specified failure-load testing when required
- Marking, traceability, quantity and packaging inspection
Reference Standards
- IEC 61284 – Overhead lines: requirements and tests for fittings
- GB/T 2315-2017 – Current technical standard for electric power fittings
- ISO 1461:2022 – Hot-dip galvanized coatings on fabricated iron and steel articles
- GB/T 13912 – Hot-dip galvanized coatings on fabricated steel articles
- Applicable utility drawings and customer technical specifications
Reference to a standard does not constitute certification. Compliance must be supported by inspection or test documentation for the exact product model supplied.
Ordering Information
Please provide the following information when requesting a quotation:
- Required EB model or approved product drawing
- Eye diameter and body thickness
- Clevis opening and transverse bolt diameter
- Required specified failure load
- Steel material and bolt grade
- Hot-dip galvanized coating requirement
- Required standard and inspection documents
- Marking, quantity and packaging requirements
Frequently Asked Questions
What is an EB-type tower attachment clevis?
It is a mechanical link fitting used between a transmission-tower attachment point and an insulator-string or overhead-line hardware assembly.
Is this product a lifting clevis?
No. It is designed for overhead-line hardware systems and must not be advertised or used as general lifting equipment.
What do the numbers in the EB model mean?
The numbers identify the manufacturer’s coupling and mechanical-performance configuration. Their exact meaning must be confirmed from the corresponding drawing rather than inferred from the product marking alone.
Are the bolt and cotter pin included?
They are normally supplied as part of the fitting, but the exact supply scope must be confirmed in the quotation and packing list.
Can custom dimensions be supplied?
Yes. Eye diameter, clevis opening, bolt size, overall dimensions, strength class and marking can be manufactured according to an approved customer drawing.
