Starrett 54125 Precision Ground Flat Stock 3/8" x 3" x 18" AISI O1 Tool Steel

The Starrett 54125 is a precision ground flat stock made from AISI O1 oil hardening tool steel, measuring 3/8" thick x 3" wide x 18" long. This high-quality tool steel is ideal for toolmakers, machinists, and precision manufacturing applications requiring dimensional stability and excellent hardening properties.

Key Features:

• AISI O1 oil hardening tool steel for superior hardness and wear resistance
• Precision ground to tight tolerances for accurate machining
• Dimensionally stable during heat treatment with minimal distortion
• Excellent for intricate work including thin sections with minimal risk of cracking
• Deep hardening characteristics for uniform hardness throughout
• Suitable for cutting tools, dies, gauges, and precision fixtures

O1 tool steel is known for its excellent machinability in the annealed condition and ability to achieve high hardness levels (58-64 HRC) after proper heat treatment. The precision ground finish ensures consistent dimensions and reduces setup time for critical applications.