UNC UNF Socket Cap Screw 12.9 Self Colour Black

UNC & UNF American Imperial Socket Cap Screws – Grade 12.9 High Tensile (Self Colour Black)

Engineered for precision machinery, automotive restoration, and high-stress mechanical assemblies, these UNC (Unified Coarse) and UNF (Unified Fine) American Imperial Socket Cap Screws deliver maximum clamping force and tensile strength. Manufactured from Grade 12.9 high-tensile alloy steel with a self-colour black finish, these DIN 912 standard Allen socket bolts provide optimum shear resistance in heavy-duty engineering applications.

Key Features & Benefits

  • Grade 12.9 High-Tensile Steel: High yield strength designed for high-load structural and mechanical fastenings.

  • Imperial UNC & UNF Thread Options: Complete coverage of Unified National Coarse (UNC) for deep engagement in soft metals and Unified National Fine (UNF) for tight pitch control under heavy vibration.

  • Precision Hexagon Socket Drive: Deep-recess Allen key socket ensures non-slip torque transmission and reduces tool wear during installation.

  • Self-Colour Black Finish: Deep oil-blackened finish provides light rust resistance while maintaining tight thread tolerances without plating buildup.

  • DIN 912 / ASME B18.3 Standard: Precision-machined cylindrical heads engineered for recessed counterbored holes and flush-surface designs.

Common Applications

  • American & Classic Automotive: Engine rebuilding, gearbox casings, suspension components, and hot rod builds using imperial fasteners.

  • Industrial Machinery & Tooling: Mold making, press tooling, heavy equipment assembly, and hydraulic systems.

  • Motorsport & Performance Engineering: High-vibration structural connections requiring reliable thread pitch engagement.