Starrett 54262 O1 Tool Steel Flat Stock 1/16x1-3/4x36 in

Product Description

The STARRETT 54262 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require a precision-ground blank ready for layout, machining, or heat treatment. It measures 1/16 inch thick, 1-3/4 inches wide, and 36 inches long, and is manufactured to AISI Type O1 tool steel specification. O1 is a widely used oil-hardening grade valued for its dimensional stability during heat treatment, good wear resistance after hardening, and ease of machining in the annealed state. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications where close dimensional control before final grinding is required.

This flat stock is used in tool and die shops, maintenance machining operations, and precision fabrication environments. Typical applications include making punches, dies, gauges, fixtures, and cutting tools. The 36-inch length allows a single bar to yield multiple blanks. It is supplied in the annealed condition, so it can be machined, drilled, and shaped before hardening. Trade professionals in tool rooms and job shops handling precision metalwork are the primary users of this material.

Key Features

• AISI Type O1 oil-hardening tool steel — stable dimensions through heat treatment cycle
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance blank work
• Length tolerance of plus 0.015 inches, minus 0 inches — never undersized in length
• Width tolerance of 0.000 to minus 0.005 inches for consistent fit in die sets and fixtures
• Edge squareness held to 0.003 inches per inch across all edges
• 36-inch full bar length provides material for multiple part blanks from a single piece

Compatibility

Designed as a general-purpose O1 tool steel flat bar for use in any tool room, die shop, or precision machining application requiring AISI Type O1 oil-hardening stock in 1/16 x 1-3/4 x 36 inch bar form.

Installation Notes

This material is supplied in the annealed state and should be machined to final form before heat treatment. Oil hardening requires controlled heating and quenching in oil — follow established heat treating procedures and applicable shop safety protocols for open quench operations. Use appropriate personal protective equipment when handling hot stock or quench oil. Cut to length with a bandsaw, cold saw, or abrasive cutoff wheel suited for tool steel.