Starrett 54158 AISI O1 Tool Steel Flat Stock 1/2" x 4-1/2" x 18"

The Starrett 54158 is a precision-ground flat stock made from AISI O1 oil-hardening tool steel, measuring 1/2 inch thick by 4-1/2 inches wide by 18 inches long. This high-quality tool steel is ideal for machinists, toolmakers, and fabricators who require dimensionally stable material for precision tooling and intricate work.

Key Features:

• AISI O1 oil-hardening tool steel for superior dimensional stability
• Precision-ground flat stock with tight tolerances
• Excellent for intricate work and thin sections with minimal risk of cracking
• Can be hardened to Rockwell C 57-62 for maximum wear resistance
• Machines cleanly and holds fine detail after heat treatment
• Dimensions: 1/2" thick x 4-1/2" wide x 18" long

O1 tool steel is a versatile, oil-hardening grade known for its ease of machining in the annealed state and excellent hardness retention after proper heat treatment. This flat stock is suitable for making punches, dies, gauges, cutting tools, and other precision tooling where dimensional accuracy is critical.