Bordo 5/16" x 18 UNC 1" Chrome Button Die

This 5/16" x 18 UNC Chrome Button Die is designed for cutting, restoring, and cleaning Unified National Coarse (UNC) external threads. Split circular chrome alloy button dies are typically used with a die stock handle, making them suitable for threading operations in workshop environments or on-site where access is limited.

Key Features:

• Thread Standard: Unified National Coarse (UNC), widely used in general engineering, manufacturing, and fastener production.
• Versatile Use:
  • Functions as a thread chaser to restore damaged or contaminated threads.
  • Capable of cutting new male threads on non-ferrous metals and plastics.
• Material: Chrome alloy construction suitable for general-purpose threading (not intended for precision, load-bearing, or safety-critical applications).
• Thread Form Details:
  • Introduced in 1948 to standardise thread forms across the USA, Canada, and the UK.
  • 60° thread angle, sharing the same profile used in metric threads (defined under JIS B0206).
  • Thread size defined by major diameter and threads per inch (TPI).
  • UNC threads provide excellent resistance to stripping when used in low tensile strength materials such as aluminium, brass, bronze, and plastics.
  • Commonly used for fast assembly/disassembly and applications where minor thread damage or corrosion may occur.

Technical Specifications:

• Diameter (inch): 5/16
• Pitch (TPI): 18
• Thread Form: UNC

Applications:

UNC threads are widely used in manufacturing, machinery maintenance, automotive repairs, fabrication, and mass-produced fasteners. This button die is ideal for thread repair, producing new external threads, and general-purpose maintenance on compatible materials.