Starrett 54665 A2 Tool Steel Flat Stock 1/2x3x36 in

Product Description

The STARRETT 54665 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die-making, and precision machining applications. Measuring 0.5 inches thick, 3 inches wide, and 36 inches long, this flat stock is ground to tight dimensional tolerances — plus or minus 0.001 inches on thickness, plus or minus 0.001 inches on squareness, and a width tolerance of plus 0.000 to 0.005 inches. A2 tool steel offers good wear resistance and dimensional stability through the air-hardening heat treatment process, making it a reliable choice for tool and die shops, maintenance machinists, and precision fabricators.

This flat stock is suited for fabricating punches, dies, gauges, fixtures, and other precision tooling components where tight tolerances and consistent hardening response are required. A2 material is commonly selected when the application demands moderate toughness combined with good abrasion resistance. The 36-inch length provides usable stock for layout and machining without excessive waste. This item ships as a single bar and is appropriate for both job shop and production toolroom environments.

Key Features

• A2 air-hardening tool steel — good dimensional stability during heat treat
• Ground flat stock with plus or minus 0.001 inch thickness tolerance
• Width tolerance of plus 0.000 to 0.005 inches for consistent fitment
• Squareness tolerance of plus or minus 0.001 inch
• Edge squareness: all edges held to 0.003 inches per inch
• Length tolerance of plus 0.25 inches from nominal 36-inch length

Compatibility

Designed as a standard AISI A2 air-hardening tool steel flat bar suitable for general toolroom and die-making applications requiring ground flat stock in this size range.

Installation Notes

Machining and grinding of tool steel flat stock should be performed by qualified machinists or toolmakers using appropriate cutting fluids and tooling rated for hardened or semi-hardened steel. Heat treatment should follow AISI A2 specifications and be performed by a qualified heat treater. Secure workpieces properly before machining to maintain dimensional accuracy. Follow applicable shop safety practices when handling bar stock of this weight — at 17.59 pounds, proper lifting technique or mechanical assistance is recommended.