ASME B18.3 | High Strength | Precision Fastening | NZ

Tight access. High strength. Clean finish.

These UNF socket head cap screws (1/4"-28) are designed for precision fastening in high-performance applications. Manufactured to ASME B18.3, they feature a compact cylindrical head with an internal hex drive, making them ideal for tight spaces and clean installations.

Made from high-strength alloy steel, these fasteners deliver excellent tensile strength and durability. The fine thread (UNF) provides improved clamping force and resistance to loosening, making it suitable for automotive, machinery, and engineering use.

More control. More strength. Built for precision work.

Why We Use Them in the Workshop

• Alloy steel construction for high strength
• Socket (Allen) head for tight access areas
• Clean, low-profile finish
• UNF fine thread for better clamping performance
• Ideal for precision and performance applications
• Reliable quality to ASME standard

Key Features

• Standard: ASME B18.3
• Material: Alloy steel
• Finish: Plain (uncoated)
• Head Type: Socket head cap
• Drive Type: Internal hex (Allen)
• Thread Type: UNF (fine thread)
• Thread Design: Full thread

Ideal For

• Automotive and performance builds
• Engine components
• Machinery and engineering
• Tight access fastening applications
• Workshop and fabrication use

Built for Precision Applications

These socket head cap screws NZ professionals rely on deliver strength, accuracy, and a clean finish — ideal for high-performance and detailed work.