Starrett 54552 A2 Tool Steel Flat Stock 0.125x3.5x36 in

Product Description

The STARRETT 54552 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Cut to 0.125 inches thick, 3.5 inches wide, and 36 inches long, this stock arrives ground and ready for layout, fabrication, or heat treatment. A2 tool steel offers good wear resistance and dimensional stability through the air-hardening process, making it a reliable choice for punches, dies, gauges, and custom tooling components. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is maintained to 0.003 inches per inch on all edges.

This flat stock is suited for machine shops, tool and die operations, and maintenance facilities that fabricate or repair precision tooling. The 36-inch length provides usable stock for multiple small blanks or a single longer workpiece. The tight dimensional tolerances reduce the amount of grinding or finishing required before layout and machining. It is appropriate for both one-off tool fabrication and short-run production scenarios where consistent material properties are critical.

Key Features

• AISI A2 air-hardening tool steel for predictable heat treat response and minimal distortion
• Thickness held to plus or minus 0.001 inches for precise fitment in tooling applications
• Width tolerance of plus 0.000 to 0.005 inches provides a consistent upper-bound fit
• Length tolerance of plus 0.25 inches ensures full usable stock length
• Squareness maintained to 0.003 inches per inch on all edges
• Single-piece packaging — no minimum bundle requirement beyond one unit

Compatibility

Designed as a standard A2 tool steel flat stock blank for use in tool and die fabrication, gauge making, punch and die sets, and similar precision tooling applications where air-hardening steel stock is specified.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by a qualified machinist or toolmaker using appropriate metalworking equipment. Follow standard shop safety practices including eye and hand protection when sawing, grinding, or milling. If heat treatment is performed, consult the material specification for proper austenitizing temperature and air-quench procedure — do not substitute oil or water quench for A2 steel. All work involving grinders or saws should comply with applicable OSHA and shop safety standards.