Starrett 57037 O1 Tool Steel Flat Stock 5/8x3x18 in

Product Description

The STARRETT 57037 is an O1 oil-hardening tool steel flat stock bar measuring 0.625 inches thick, 3 inches wide, and 18 inches long. Made from AISI Type O1 tool steel, this flat stock is a machinist-grade material used for making dies, punches, gauges, jigs, and precision tooling. O1 tool steel offers reliable edge retention and dimensional stability through the oil-hardening heat treatment process. Thickness and width tolerances are held to +0.010 to 0.015 inches, and length tolerance is +0.250 inches. Edge squareness is held to 0.003 per inch across all edges. This material is cut and used by tool-and-die makers, machinists, and precision fabricators working in job shops and manufacturing environments.

This flat stock is suited for applications where a machinable, heat-treatable tool steel is required. It is commonly used in the fabrication of custom cutting tools, forming dies, fixture components, and precision gauging stock. The 18-inch length provides enough material for multiple smaller parts or a single longer tool blank. The consistent cross-section tolerances make it well-suited for applications requiring close fit-up before hardening. Tool-and-die shops, metalworking classrooms, and production machine shops are typical end-use environments for this stock size.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable heat treatment response
• Thickness and width tolerances of +0.010 to 0.015 inches for consistent fit before machining
• Length tolerance of +0.250 inches provides slight overage for facing and cleanup
• Edge squareness held to 0.003 per inch on all edges for accurate layout and fixturing
• 0.625 inches thick by 3 inches wide cross-section suits medium-duty tooling blanks
• Single-piece package quantity supports one-off and small-batch tooling projects

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock for general toolmaking, die-making, and precision fabrication applications requiring a heat-treatable carbon tool steel blank.

Installation Notes

O1 tool steel flat stock is machined, ground, and heat-treated by qualified machinists or tool-and-die makers. Cut to length using appropriate metal-cutting saws or abrasive wheels rated for tool steel. Oil hardening should be performed by personnel familiar with heat treatment procedures for AISI O1 steel, following applicable shop safety protocols. Allow material to reach ambient temperature before precision layout or finish grinding to avoid measurement error from thermal expansion.