Round Weld Spacer with Internal Thread

Core Features

Internal Threaded Bore – The central bore contains pre-formed internal threads that accept standard bolts or screws, enabling direct component attachment to the spacer after welding. This eliminates the need for separate nut components or secondary tapping operations.

Weldable Configuration – Manufactured from material grades and with geometries compatible with welding attachment to base workpieces. The spacer body provides sufficient mass and surface area for weld formation.

Zinc Plated Finish – The coating provides a barrier layer against corrosion through zinc sacrificial protection, with defined coating thickness and salt spray test performance specified by applicable coating standards.

Round Cylindrical Profile – The spacer body features a circular cross-section with consistent outer diameter and length dimensions, supporting vertical alignment and consistent spacing between stacked components.

Product Characteristics

The spacer is manufactured with an outer diameter dimensioned to provide the required load-bearing surface and an internal thread sized to accommodate the specified fastener. The cylindrical shape maintains consistent spacing between components by providing a rigid standoff that prevents collapse under clamping load.

The internal threaded section is produced with thread dimensions and tolerances following standard metric or imperial thread profiles. Thread sizes range from M3 to M20, with both fine and coarse thread pitches available. Material composition is controlled to meet the specified strength and weldability requirements. Carbon steel grades are available for general applications requiring welding, with material selection affecting column strength and load-bearing capacity.

The zinc plating is applied through an electroplating process, with coating thickness maintained within specified tolerances to ensure consistent surface protection while preserving dimensional tolerances. Alternative surface treatments including zinc flake coating, nickel plating, and phosphate coating are available based on environmental exposure requirements.

Application Scenarios

Panel and Frame Construction – Used in sheet metal assemblies where spacers are welded to base structures to create fixed attachment points for subsequent bolted connections. The internal thread allows components to be secured directly to the spacer without requiring access to the backside of the material.

Automotive Body and Structural Assembly – Applied in vehicle frame construction, chassis components, and body panels where spacers provide defined standoff distances between structural members and enable component attachment within hollow cavities.

Industrial Equipment and Machinery – Employed in equipment frames and assemblies where components require consistent spacing and where welded attachment provides permanent positioning of the spacer relative to the base structure.

Printed Circuit Board Mounting – Used in electronics assembly applications where spacers provide stable standoff height for PCB mounting while the internal thread accommodates fasteners.

Customization Options

Specifications and configurations can be adjusted based on application requirements. Outer diameter, internal thread size, and overall length dimensions are customizable according to application geometry. Material grades include carbon steel for weldable applications and stainless steel for corrosion-resistant requirements. Surface treatments are selectable according to environmental exposure conditions, including zinc plating with alternative finishes, zinc flake coating, nickel plating, and phosphate coating.

Frequently Asked Questions

Q: What is the difference between a weldable spacer with internal thread and a standard spacer?
A: A weldable spacer with internal thread is manufactured from material grades and with geometries compatible with welding attachment to a base workpiece, enabling permanent positioning. The internal thread provides a fastening point for subsequent component attachment, whereas standard spacers are typically unthreaded and used only for spacing functions.

Q: Can these spacers be supplied in non-standard thread sizes?
A: Thread sizes outside the standard range can be manufactured upon request, subject to tooling availability and minimum order quantity requirements. Custom dimensional specifications are evaluated on a per-order basis.

Q: Are these spacers reusable after welding?
A: The welded configuration is intended for permanent installation. Once welded to a workpiece, the spacer is fixed in position and cannot be removed without destructive methods. The internal thread remains usable for component attachment throughout the service life of the assembly.

Q: What welding methods are compatible with this product?
A: The spacer can be attached using welding processes compatible with the spacer material grade and workpiece material. Resistance welding and projection welding are commonly used methods, with welding parameters set based on material grade, thickness, and equipment specifications.

Q: What is the recommended tightening torque for fasteners used with these spacers?
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, considering friction conditions influenced by surface treatment and lubrication.

Q: Are there specific storage requirements for weldable spacers?
A: For uncoated carbon steel spacers, storage in dry conditions with controlled humidity is recommended to prevent corrosion prior to installation. For zinc plated spacers, storage should maintain coating integrity by avoiding abrasive contact or impacts that may affect coating performance.

Installation Considerations

Pre-weld surface preparation should include removal of oil, grease, and oxide layers from the spacer contact area and workpiece surface to support weld consistency. The spacer should be positioned with the end face in full contact with the workpiece surface. Welding parameters require calibration according to spacer material grade, thickness, and equipment specifications.

For zinc plated spacers, the coating may affect weld quality; welding parameters should be adjusted or coating removed from the weld area prior to welding. Post-weld inspection should verify fusion quality through visual examination and torque testing of the internal thread when applicable.

When installing components using the internal thread, the fastener should engage the full thread length without cross-threading. Thread condition should be inspected before installation, and contamination or damage to the internal threads may reduce clamping performance. For applications requiring repeated assembly cycles, thread wear should be monitored and torque values verified against the assembly specification.