Drill Rod Tool Steels 81177008 4142 Flat Stock 36x1x1

Product Description

The DRILL ROD TOOL STEELS 81177008 is a pre-hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specifications. It measures 36 inches long by 1 inch wide by 1 inch thick and ships in a single-piece quantity. The 4142 chromium-molybdenum alloy grade delivers a balance of toughness, wear resistance, and through-hardened strength that makes it well suited for tooling, fixturing, and structural machine components. Machinists, tool-and-die makers, and maintenance professionals working in fabrication shops rely on this flat stock for applications that demand dimensional consistency and material integrity straight from the bar.

This flat stock is used in general industrial and manufacturing environments where a pre-hardened condition eliminates additional heat-treat steps. Typical applications include die blocks, wear plates, guide rails, jigs, fixtures, and structural machine components. Because the bar arrives pre-hardened, it is ready for machining to final dimensions without an intermediate hardening cycle, reducing lead time in tooling and repair work.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel for high toughness and wear resistance
• Pre-hardened condition - no additional heat treatment required before use
• Length tolerance of plus 0.250 inches ensures consistent stock length for cut-to-size work
• Width tolerance of plus 0.005 inches supports accurate layout and machining
• Thickness tolerance of plus 0.001 inches for close-tolerance tooling applications
• Square tolerance of 0.003 inches maintains perpendicularity across the bar profile

Compatibility

Designed as a direct-use flat bar for general machining, tooling, and fabrication applications requiring AISI/SAE 4142 pre-hardened alloy steel stock.

Installation Notes

Cutting and machining of pre-hardened 4142 alloy steel requires carbide tooling; high-speed steel tooling is generally not recommended at full hardness. Secure the workpiece firmly in a vise or fixture before cutting or grinding operations. Wear appropriate PPE including eye protection and gloves when handling machined edges. Consult applicable shop safety standards and equipment manufacturer guidelines before beginning any machining operation.