Starrett 54348 O1 Tool Steel Flat Stock 3/16x4x36 in

Product Description

The STARRETT 54348 is an O1 oil-hardening tool steel flat stock bar measuring 3/16 inches thick, 4 inches wide, and 36 inches long. AISI Type O1 tool steel is a versatile, tungsten-alloyed oil-hardening grade known for its dimensional stability during heat treatment and its ability to hold a sharp edge after hardening. This flat stock is supplied in the annealed condition and is ready for machining, grinding, and heat treating to final hardness. Machinists, toolmakers, and die makers use this material to fabricate punches, dies, gauges, jigs, and cutting tools. The tight thickness tolerance of plus or minus 0.001 inches supports precision layout and tooling work.

This flat stock is suited for tool and die shops, maintenance machining operations, and prototype fabrication in both job shop and industrial settings. The 36-inch length provides enough material for multiple tool blanks or a single long die component. The 4-inch width accommodates a wide range of flat die and fixture applications. Professionals in general machining, mold making, and precision metalworking will find this bar stock appropriate for applications requiring a predictable, heat-treatable tool steel with consistent cross-section tolerances.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response and good wear resistance
• Thickness tolerance of plus or minus 0.001 inches for precise tooling and gauge applications
• Width tolerance of 0.000 to minus 0.005 inches ensures clean fit in mating fixtures
• Length tolerance of plus 0.015 inches provides material for final facing operations
• Edge squareness held to 0.003 inches per inch across all edges
• Annealed condition allows full machinability before hardening

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat bar suitable for general tool and die fabrication, fixture making, and precision machining applications requiring a flat, ground, and heat-treatable stock form.

Installation Notes

Cutting, grinding, and heat treating of tool steel should be performed by qualified machinists or toolmakers familiar with oil-hardening procedures and appropriate quench media. Secure the workpiece properly before any machining or cutting operation. Follow applicable shop safety protocols for handling sharp-edged metal stock. Heat treatment should conform to the material supplier recommendations for AISI O1 to avoid cracking or distortion.