Starrett 54365 AISI O1 Flat Ground Tool Steel 1/4" x 1-1/4" x 36"

The Starrett 54365 is a precision flat ground stock made from AISI O1 oil hardening tool steel, measuring 1/4 inch thick by 1-1/4 inches wide by 36 inches long. This high-quality tool steel is ideal for tool and die makers, machinists, and manufacturers requiring dimensionally stable material for precision work.

Key Features:

• AISI O1 oil hardening tool steel for superior hardness and wear resistance
• Precision flat ground finish on all surfaces for tight tolerances
• Dimensionally stable through heat treating process
• Excellent for intricate work including thin sections with minimal risk of cracking
• Suitable for punches, dies, gauges, cutting tools, and jigs
• Can be hardened to Rockwell C 57-62 with proper heat treatment

O1 tool steel is a versatile, general-purpose tool steel known for its ease of machining in the annealed state and excellent dimensional stability when heat treated. The flat ground finish ensures consistent thickness and parallelism, making it ideal for applications requiring precision and repeatability.