Starrett 57345 A2 Tool Steel Flat Stock 3/8x3/4x36 in

Product Description

The STARRETT 57345 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI A2 specifications, this flat stock offers tight dimensional tolerances and consistent squareness, making it suitable for fabricating punches, dies, gauges, and other precision tooling components. The bar measures 0.375 inches thick, 0.750 inches wide, and 36 inches long, with a weight of 3.29 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is controlled to 0.003 inches per inch on all edges. Licensed machinists and tool-and-die makers are the primary users of this material.

This flat stock is suited for job shops, tool rooms, and manufacturing facilities requiring close-tolerance raw stock for custom tooling. A2 tool steel is a common choice when moderate toughness combined with good wear resistance and air-hardening characteristics are needed. The 36-inch length allows for multiple parts to be cut from a single bar, reducing material waste in production environments. This bar ships as a single piece and requires no minimum order beyond one unit.

Key Features

• AISI A2 air-hardening tool steel for consistent heat-treat response without oil quench
• Thickness tolerance of plus or minus 0.001 inches for precision fitment
• Width tolerance of plus 0.000 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Squareness held to 0.003 inches per inch on all edges
• 36-inch bar length supports multi-part cutting from a single piece

Compatibility

Designed as a general-purpose A2 tool steel flat stock for use in tool-and-die, jig, fixture, and precision machining applications requiring air-hardening material.

Installation Notes

Cutting and machining should be performed by qualified machinists using appropriate tooling rated for hardened or pre-hardened steel stock. Heat treating to final hardness should follow established AISI A2 protocols and is typically performed by a licensed heat-treat facility or in-house with calibrated furnace equipment. Always use appropriate personal protective equipment when cutting, grinding, or machining tool steel bar stock.