Drill Rod Tool Steels 81173809 Alloy Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 81173809 is a pre-hardened alloy steel flat stock bar made to AISI/SAE Type 4142 specification. It measures 18 inches long by 0.5 inches wide by 0.25 inches thick and weighs 0.64 pounds. Type 4142 is a chromium-molybdenum alloy steel known for its high strength, toughness, and wear resistance in the pre-hardened condition. This flat stock is suited for machining, fabrication, and tooling applications where consistent dimensions and tight tolerances are required. Machinists, tool-and-die makers, and metalworking fabricators typically work with this material for fixtures, guides, wear parts, and custom tooling components.

This flat stock is used in machine shops, maintenance facilities, and industrial fabrication environments. Its pre-hardened state allows it to move directly into machining or finishing operations without additional heat treatment in many applications. The precise dimensional tolerances make it appropriate for close-tolerance tooling, jigs, fixtures, and structural machine components in both light and heavy industrial settings. It is sold in single-piece quantities with a minimum order quantity of one.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel for high strength and toughness
• Pre-hardened condition ready for machining without additional heat treatment in many applications
• Length tolerance of plus 0.125 inches ensures consistent oversize stock for finish machining
• Width tolerance of plus 0.005 inches and thickness tolerance of plus 0.001 inches for precise fitment
• Square tolerance of 0.003 inches maintains consistent cross-section geometry
• Single-piece minimum order quantity for low-volume and prototyping needs

Compatibility

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

Installation Notes

Cutting, drilling, and grinding pre-hardened alloy steel requires tooling rated for hardened materials such as carbide-tipped or high-speed steel cutters. Secure the stock firmly in a vise or fixture before machining to prevent movement and maintain dimensional accuracy. Follow applicable shop safety standards when cutting or grinding, including use of appropriate personal protective equipment and coolant where specified by tooling manufacturers.