Carbon Steel Straight Cylindrical Reinforced Connecting Sleeve

Core Features

Reinforced Wall Construction – The sleeve is manufactured with increased wall thickness or enhanced material properties that provide load-bearing capacity for applications requiring higher connection strength. The reinforced configuration supports axial tension and pressure loads without compromising thread integrity.

Internal Threaded Bore – The central bore contains continuous internal threads that accept standard bolts, screws, or threaded rods, enabling axial connection of threaded components through the sleeve body. The continuous thread design allows for full engagement with mating threads.

Straight Cylindrical Profile – The sleeve features a consistent outer diameter along its length, providing a uniform cross-section for assembly and supporting applications with specified outer diameter requirements.

Carbon Steel Construction – Manufactured from carbon steel with material composition controlled to meet specified strength requirements for general applications. Material selection supports both load-bearing capacity and thread formation.

Product Characteristics

The sleeve is manufactured with a straight cylindrical body and internal threads extending along the full length of the bore. The outer diameter is maintained with consistent dimensions along the length. The reinforced configuration provides increased wall thickness or enhanced mechanical properties, delivering load-bearing capacity for applications requiring higher connection strength.

The internal thread is produced with dimensions and tolerances following standard metric or imperial thread profiles. Thread classes include 6H for metric specifications. Material composition is controlled to meet specified strength requirements. Carbon steel grades are available for general applications, with material selection affecting column strength and load-bearing capacity . Grade 45 carbon steel is a standard material for connecting sleeves, providing a tensile strength sufficient for reinforcing bar connections .

Surface treatment options include zinc plating with various chromate finishes, zinc flake coating, nickel plating, phosphate coating, and black oxide . Each treatment is applied according to defined coating thickness and corrosion resistance parameters.

Application Scenarios

Structural Steel Connections – Used in building construction and reinforced concrete structures where the sleeve provides axial connection for reinforcing bars or structural members . The reinforced configuration supports the transfer of tensile and compressive loads between connected elements.

Construction and Infrastructure – Applied in bridge construction, building frameworks, and precast concrete assemblies where mechanical splicing of reinforcing bars is specified . The sleeve eliminates the need for overlapping bar splices, providing connection efficiency.

Heavy Equipment and Machinery – Utilized in frame construction and equipment assembly where internal threads enable component attachment without requiring access to both ends.

General Industrial Assembly – Employed in applications requiring secure threaded connections where the reinforced configuration provides additional load-bearing capacity compared to standard sleeves.

Customization Options

Specifications and configurations can be adjusted based on application requirements. Outer diameter, overall length, and thread size are customizable according to application geometry . Material grades include carbon steel for general applications and higher-strength steel grades for reinforced requirements. Surface treatments are selectable according to environmental exposure conditions, including zinc plating with various chromate finishes, zinc flake coating, nickel plating, phosphate coating, and black oxide.

Frequently Asked Questions

Q: What is the difference between a reinforced connecting sleeve and a standard sleeve?
A: A reinforced connecting sleeve incorporates increased wall thickness or enhanced material properties compared to standard sleeves, providing load-bearing capacity for applications requiring higher connection strength.

Q: What materials are available for reinforced connecting sleeves?
A: Material grades include grade 45 carbon steel for general applications and higher-strength steel grades for enhanced load-bearing requirements .

Q: Can these sleeves be supplied in non-standard lengths?
A: Custom lengths can be manufactured upon request, subject to tooling availability and minimum order quantity requirements .

Q: What is the recommended tightening torque for fasteners used with these sleeves?
A: Tightening torque values are determined by the internal thread size, fastener grade, and application load requirements. Torque specifications should be obtained from engineering standards or calculation methods defined in fastener design guidelines.

Q: What surface treatments are available?
A: Surface treatments include zinc plating (clear, yellow, black chromate), zinc flake coating, nickel plating, phosphate coating, and black oxide . Treatment selection is based on corrosion resistance requirements and environmental exposure conditions.

Q: Are these sleeves suitable for connecting reinforcing bars?
A: Yes. The sleeves provide mechanical splicing for reinforcing bars, connecting bars of the same diameter through internal thread engagement . The connection performance meets applicable standards for structural applications.

Installation Considerations

The sleeve should be positioned with the internal thread aligned to the mating fastener or reinforcing bar. The fastener should engage the internal thread through the full engagement length specified for the application. Torque application should follow specified tightening procedures. Thread condition should be inspected before installation; damaged or contaminated threads may affect torque readings and assembly integrity.

For reinforcing bar connections, the reinforcing bars are prepared by stripping the longitudinal and transverse ribs from the connection end, then rolling a straight thread onto the bar . The prepared bar ends are then screwed into the sleeve to form the connection. The connection performance meets Grade I joint performance requirements for reinforced concrete structures .

For plated or coated sleeves, coating thickness should be within specified tolerances to maintain thread fit. When used with components subject to thermal expansion or dynamic loads, the sleeve material and engagement length should be evaluated against application requirements.