Carbon Steel Slotted Chicago Screws

O processo de encabeçamento a frio é um dos novos processos para a maquinagem sob pressão com menos ou nenhum corte
metal. É um método de processamento que utiliza a deformação plástica do metal sob a ação de
forças externas e, com a ajuda de moldes, redistribui e transfere o volume de metal para formar
as peças ou os espaços em branco necessários. O processo de encabeçamento a frio é o mais adequado para a produção de
elementos de fixação, tais como cavilhas, parafusos, porcas, rebites, cavilhas, 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

• Resistência à vibração: 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