Carbon Steel Straight Internal Thread Sleeve

Core Features

Internal Threaded Bore – The central bore contains pre-formed internal threads that accept standard bolts, screws, or threaded rods, enabling axial connection of threaded components through the sleeve body.

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.

Continuous Internal Threading – Internal threads extend throughout the full length of the sleeve, allowing the component to serve as a fully threaded connector or coupling element.

Carbon Steel Construction – Manufactured from carbon steel with material composition controlled to meet specified strength requirements for general applications.

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 internal thread is produced with dimensions and tolerances following standard metric or imperial thread profiles. Thread classes include 6H for metric specifications and Class 2B for unified standards.

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. Material grades such as 1018 carbon steel and 12L14 carbon steel are available.

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. The black oxide finish provides a uniform appearance with defined corrosion resistance properties.

Application Scenarios

Fastener Connection – Used where two threaded components require axial connection, providing an internally threaded coupling that engages with external threads on both ends.
Spacer and Standoff Applications – Applied where a defined distance is required between components and the sleeve provides both spacing function and threaded connection capability.
Bracket and Panel Mounting – Employed in mounting configurations where the sleeve passes through panels or brackets and provides threaded receptacles for component attachment.
Automotive and Machinery Assembly – Utilized in frame construction and equipment assembly where internal threads enable component attachment without requiring access to both ends.

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 stainless steel for corrosion-resistant 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 threaded sleeve and a standard nut?
A: A threaded sleeve provides internal threads along its full length with a cylindrical outer profile, enabling connection of threaded components and serving as a coupling element. A standard nut has internal threads with a hexagon drive configuration, intended for installation using wrenches or sockets.

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 materials are available for threaded sleeves?
A: Material grades include carbon steel 1018 and 12L14 for general applications and stainless steel for corrosion-resistant requirements. Material selection affects strength characteristics and corrosion resistance.

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

Q: What is the maximum thread length available?
A: Thread length is determined by the overall sleeve length, as internal threads extend throughout the full length of the bore for most configurations.

Installation Considerations

The sleeve should be positioned with the internal thread aligned to the mating fastener. 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 applications where the sleeve functions as a spacer, the overall length should be selected to provide the required standoff distance between components. For plated or coated sleeves, coating thickness should be within specified tolerances to maintain thread fit. When used with components subject to thermal expansion, the sleeve material and length should be evaluated against the application thermal cycling requirements. For applications requiring specific torque coefficients, reference values should be obtained from applicable standards for the specific thread size range.