Cross Knurled Inserts

Cross Knurled Inserts are precision-engineered threaded inserts designed to deliver maximum torque resistance, superior pull-out strength, and long-lasting fastening performance in plastics, wood, thermoplastics, and soft metals. The unique cross-knurl pattern, featuring intersecting knurl lines, provides exceptional grip by biting firmly into the host material, preventing rotation and loosening under load.

Manufactured from high-quality brass, stainless steel, or aluminum (as required), these inserts offer excellent corrosion resistance and stable mechanical properties. They are ideal for high-performance applications requiring secure, vibration-resistant internal threads in molded, machined, or drilled holes.

Cross Knurled Inserts are widely used in electrical components, automotive assemblies, communication devices, plastic enclosures, industrial equipment, consumer electronics, and custom OEM parts. They can be installed using press-fit, ultrasonic insertion, or heat-setting, depending on the material and design.

Engineered for precision, durability, and repeatable performance, Cross Knurled Inserts provide reliable threaded joints, enhancing product lifespan and ensuring consistent fastening strength across applications.

• Cross Knurled Inserts are manufactured through a highly controlled precision engineering process to ensure consistent quality, dimensional accuracy, and superior mechanical properties.

  1. Raw Material Selection

  High-grade brass (CZ121/CW614N), stainless steel (304/316), or aluminum rods are carefully selected based on customer specifications and application requirements. Each batch undergoes chemical and mechanical testing to ensure compliance with global material standards.

  2. CNC Turning

  The selected raw rods are fed into CNC automatic turning machines, where the insert body is shaped. CNC turning ensures:

  • Precise outer diameter

  • Accurate inner threading allowance

  • Controlled length tolerance

  This step forms the initial cylindrical body of the insert.

  3. Cross Knurling Operation

  The insert body is passed through specialized knurling tools to produce a cross-knurl (diamond) pattern.
  This knurling pattern is crucial for:

  • Enhanced grip within plastics

  • High torque resistance

  • Prevention of rotation under load

  The knurl depth and angle are adjusted as per application requirements.

  4. Thread Cutting / Thread Rolling

  Internal threads are produced using:

  • Thread cutting for brass and aluminum

  • Thread rolling for stainless steel (for improved strength)

  Threads are made according to metric or UNC/UNF standards.

  5. Deburring & Polishing

  The inserts are deburred to remove sharp edges and burrs formed during machining.
  Polishing improves:

  • Surface finish

  • Handling safety

  • Aesthetic appearance

  6. Electroplating / Surface Coating (Optional)

  Depending on customer requirements, various finishes are applied, such as:

  • Nickel plating

  • Tin plating

  • Chrome plating

  • Passivation (for stainless steel)

  These coatings provide corrosion resistance and improved durability.

  7. Final Inspection & Quality Testing

  Each batch undergoes stringent quality checks for:

  • Dimensional accuracy

  • Thread gauge testing

  • Knurl depth measurement

  • Torque resistance check

  • Visual inspection under magnification

  Advanced machines like profile projectors, micrometers, and thread gauges ensure perfect tolerance control.

  8. Cleaning & Drying

  Inserts are cleaned in ultrasonic baths or vibro-cleaners to remove oil, debris, and machining residue, then dried to prevent oxidation.

•  

Our Cross Knurled Inserts are manufactured following international quality norms:

• ISO 9001:2015 Certified Quality Management System

• ROHS & REACH Compliance – ensuring lead-free and environmentally safe materials

• Dimensional Accuracy Standards: ±0.02 mm (depending on size)

• Thread Standards: ISO Metric / UNC / UNF

• Torque & Pull-Out Testing: Performed on sample batches

• Full Traceability:
  Every batch is labeled with manufacturing date, machine number, operator ID, and material lot.

Quality Assurance Includes:

• 100% internal thread gauge testing

• Random sampling per AQL standards

• Surface finish evaluation

• Plating thickness measurement

• Material certification available on request (EN 10204 3.1)

• Furniture manufacturing

• Cabinetry and joinery

• MDF, plywood & particle board fixing

• Plastic components and mouldings

• Electrical fittings and housings

• DIY assemblies and industrial fixtures

• Appliances and mechanical parts

Sample Time:Available in 5-10 days for different items.

Drawing Format:CAD / PDF / DWG / IGS / STEP.

Packaging:Standard package, Carton box or Pallet, As per customized specifications

Shipping:DHL, FEDEX, UPS and By Sea or as per client’s requirements.