Starrett 57666 A2 Tool Steel Flat Stock 1-1/2x2-1/2x18 in

Product Description

The STARRETT 57666 is an A2 air-hardening tool steel flat stock bar measuring 1-1/2 inches thick, 2-1/2 inches wide, and 18 inches long. Manufactured from AISI Type A2 tool steel, this flat stock is supplied in the annealed condition, ready for machining, grinding, and subsequent heat treatment. A2 tool steel offers good dimensional stability during air-hardening, making it a reliable choice for dies, punches, gauges, and precision tooling components. Machinists, tool-and-die makers, and industrial maintenance technicians work with this material when fabricating or repairing production tooling that requires a balance of toughness and wear resistance.

This flat stock is suited for job shops, tool rooms, and maintenance departments that manufacture or refurbish tooling in-house. Typical applications include blanking dies, forming dies, trimming punches, shear blades, and precision fixtures. The close tolerance on thickness, width, and squareness simplifies layout and reduces stock removal during finishing operations. The 18-inch length provides workable blanks for most standard tooling sizes without excessive cutoff waste.

Key Features

• AISI Type A2 air-hardening tool steel for stable, low-distortion heat treatment
• Thickness tolerance of +0.010 to 0.015 inches for consistent stock dimensions
• Width tolerance of +0.010 to 0.015 inches
• Squareness tolerance of +0.010 to 0.015 inches for accurate layout reference
• Length tolerance of +0.250 inches
• Ready for machining in the annealed condition prior to hardening

Compatibility

Designed as a general-purpose A2 tool steel flat bar for use in any tool room or machining application requiring AISI A2 air-hardening material in 1-1/2 x 2-1/2 inch cross-section stock.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate cutting fluids and tooling rated for hardened or semi-hardened steel. Heat treatment, including hardening and tempering, should follow AISI A2 specifications and be performed by a qualified heat treat facility or experienced toolmaker. Always wear appropriate PPE when cutting, grinding, or handling raw steel stock. Deburr all edges after machining to prevent handling injuries and to ensure accurate fixture seating.