RS PRO Tool Steel Flat Bar 150mm Width x 12mm Height x 500mm Length, Ground, BS4659 1971 BO1, Flat, 855-614

The RS PRO 855-614 Tool Steel Flat Bar offers high-precision dimensioning and is constructed to fulfil demanding engineering and industrial requirements. With a substantial size of 150mm width, 12mm height, and 500mm length, this flat bar is an ideal base stock for a range of forming, fabricating, and toolmaking applications.

This flat bar is produced from premium tool steel and delivered in a fully annealed state, which ensures it is free from carburisation. The annealing process provides an optimal balance of machinability and toughness, enabling the bar to be shaped and manipulated with a high degree of accuracy using conventional machining techniques.

Precision ground to close tolerances, the RS PRO 855-614 enables manufacturers and toolmakers to produce finished components with minimal further machining, reducing production time and ensuring consistent dimensional quality. Its ground surface prevents warping or distortion during hardening and ensures precise interventions at every stage of processing.

The flat bar is designed for ease of hardening, delivering excellent dimensional stability and robust resistance to wear - critical in tools and dies that experience repeated mechanical stress. Compliance with BS4659: 1971 BO1 standard assures the user that this bar meets stringent British engineering benchmarks for tool steel products.

This bar is widely deployed for manufacturing gauges, punches, dies, jigs, templates, cams, and custom machine components. Its form factor supports versatile integration in equipment manufacturing, repair, tool and die making, and mechanical prototyping in industrial, laboratory, and workshop environments.

The RS PRO 855-614 features tight tolerances: metric (width -0.000mm/+0.127mm, thickness -0.000mm/+0.050mm) and imperial (width -0.000in/+0.005in, thickness -0.001in/+0.001in), providing the consistency required for critical engineering operations. The ground flat bar is capable of withstanding heat treatment, enabling customization of mechanical properties for specific toolmaking needs.

Whether used for replacement parts, prototyping, or custom production jigs and assemblies, this high-grade steel flat bar combines quality, accuracy, and versatility for industrial settings.

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