Starrett 54341 O1 Tool Steel Flat Stock 3/16x1-1/4x36in

Product Description

The STARRETT 54341 is an O1 oil-hardening tool steel flat bar used in precision toolmaking, die work, and machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 3/16 inches thick, 1-1/4 inches wide, and 36 inches long, with a weight of 2.39 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications where dimensional accuracy is critical before hardening. Machinists, tool-and-die makers, and precision fabricators stock O1 flat bar for fixtures, punches, dies, gauges, and custom tooling blanks.

O1 tool steel flat stock is a standard choice in job shops, tool rooms, and maintenance departments where machinable pre-hardened or anneal-state stock is needed. This bar ships in annealed condition, ready to machine and finish-grind before oil-quench hardening. Edge squareness is held to 0.003 inches per inch across all edges. Typical applications include cutting tools, blanking dies, form tools, and precision jigs requiring tight dimensional control and good through-hardening characteristics.

Key Features

• AISI Type O1 oil-hardening tool steel construction for reliable through-hardening during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for tight dimensional consistency
• Length tolerance of plus 0.015 inches, zero minus for predictable stock allowance
• Width tolerance of 0.000 to minus 0.005 inches for controlled fit in tooling setups
• Edge squareness held to 0.003 inches per inch on all edges
• 36-inch bar length provides ample stock for multiple tooling blanks per piece

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general tool room and precision machining use where O1 grade flat stock is specified.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate coolant to avoid work hardening the surface. Heat treatment including oil quenching must follow established metallurgical procedures for AISI O1 tool steel and should be performed by qualified personnel in proper heat-treat equipment. Always verify final dimensions after rough machining and before hardening, as distortion may occur during the quench cycle. Grinding after hardening is standard practice to achieve final dimensional tolerances.