Drill Rod Tool Steels 81176224 Flat Stock 4142 Alloy

Product Description

The DRILL ROD TOOL STEELS 81176224 is a pre-hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. It measures 36 inches long, 3/4 inch wide, and 3/8 inch thick, and weighs 2.86 pounds. This flat stock is supplied in a hardened condition, eliminating the need for additional heat treatment before use. It is suited for tooling, fixture fabrication, jigs, wear plates, and structural machine components where dimensional consistency and strength are critical. Machinists, tool and die makers, and industrial maintenance technicians are the primary installers and end users of this material.

This flat stock is appropriate for both job shop and production environments requiring a ready-to-machine, pre-hardened steel bar. The AISI/SAE 4142 chromium-molybdenum alloy grade offers good toughness and wear resistance at moderate hardness levels. Typical applications include die components, support rails, guide bars, brackets, and custom tooling inserts in manufacturing and maintenance settings. Its precise tolerances make it suitable for applications where close fits and consistent cross-sections are required without additional grinding or sizing.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel for strength and toughness
• Pre-hardened condition - ready to machine without additional heat treatment
• 36 inches long with a length tolerance of +0.250 inches
• Width tolerance of +0.005 inches for consistent cross-section fitment
• Thickness tolerance of +0.001 inches for close-tolerance applications
• Square tolerance of 0.003 inches ensures geometry accuracy across the bar

Compatibility

Designed as a general-purpose pre-hardened flat bar for tooling, fixturing, and machine component fabrication where AISI/SAE 4142 alloy steel stock is specified.

Installation Notes

Cutting, drilling, and machining of pre-hardened steel stock should be performed by qualified machinists using appropriate tooling rated for hardened alloy steels. Carbide-tipped or high-speed steel tooling is typically required. Secure the workpiece properly before machining to prevent movement. Follow applicable shop safety standards and use appropriate personal protective equipment when cutting or grinding this material.