Carbon Steel Slotted Chicago Screws

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

1. Fundamental Definition

A carbon steel slotted Chicago screws is a specialized two-part mechanical fastener consisting of:

• A male-threaded post with a slotted drive head

• A female-threaded barrel with an integrated flange

These fasteners create secure, flush-mounted joints in applications requiring repeated assembly/disassembly while maintaining structural integrity.

2. Material Specifications

• Base Material: Low-to-medium carbon steel (typically 1008-1035 grades)

• Surface Treatments:

  • Zinc plating (most common corrosion protection)

  • Black oxide (for tooling and industrial applications)

  • Nickel plating (enhanced wear resistance)

  • Untreated (for temporary assemblies or painting)

4. Mechanical Properties

• Tensile Strength: 45,000-70,000 psi (depending on carbon content)

• Shear Strength: Approximately 60% of tensile strength

• Torque Capacity: 5-25 in-lbs (0.56-2.82 Nm) for standard sizes

• Temperature Range: -20°F to +250°F (-29°C to +121°C) untreated

5. Functional Advantages

• Vibration Resistance: Thread-locking action prevents self-loosening

• Material Versatility: Compatible with:

• Serviceability: Allows non-destructive disassembly

• Aesthetic Finish: Provides clean, professional appearance

7. Specialized Variants

• Security Versions: Require custom driver bits

• Shoulder Screws: Unthreaded midsections for rotational applications

• O-Ring Equipped: Integrated sealing for waterproof joints

• Knurled Barrel: Tool-free hand tightening models

8. Installation Protocol

1. Hole Preparation:

   • Drill clearance hole (0.005″-0.010″ larger than barrel OD)

   • Countersink if required (typically 82° for flat heads)

2. Assembly Process:

   • Insert barrel from reverse side

   • Thread post through primary material

   • Carbon Steel Slotted Chicago Screws

10. Industry Applications

• Transportation: Aircraft interior panels, automotive trim

• Defense: Body armor assembly, weapon accessories

• Retail: Display fixture construction

11. Cost Analysis

• Unit Cost: $0.15-$2.50 depending on:

  • Volume (breaks at 1,000+ units)

  • Plating requirements

  • Precision tolerances