Drill Rod Tool Steels 81173528 Alloy Steel Flat Stock 4142

Product Description

The DRILL ROD TOOL STEELS 81173528 is a pre-hardened alloy steel flat stock bar conforming to AISI/SAE Type 4142 specification. It measures 18 inches long by 3/16 inch wide by 3/16 inch thick and weighs 0.18 pounds. Pre-hardened 4142 alloy steel delivers elevated strength and wear resistance compared to annealed bar stock, making it suitable for applications where additional heat treatment is not practical after cutting or machining. This flat stock is used by machinists, toolmakers, and maintenance tradespeople who need dimensionally consistent, ready-to-use steel bar in small quantities.

This flat stock is well suited for fabrication of jigs, fixtures, keys, shims, guides, wear plates, and machine components in both shop and field maintenance environments. The 3/16 inch square cross section and 18 inch length make it a practical starting size for light tooling and small structural parts. It ships in a minimum order quantity of one piece, making it accessible for single-repair or prototype applications across industrial, HVAC, plumbing, and general mechanical trades.

Key Features

• AISI/SAE Type 4142 alloy steel construction provides high tensile strength and toughness in the pre-hardened condition
• Pre-hardened condition eliminates the need for post-machining heat treatment in many applications
• Length tolerance of +0.125 inch ensures stock is never undersized on the long dimension
• Width tolerance of +0.005 inch and thickness tolerance of +0.001 inch support precise fitment in close-clearance applications
• Square tolerance of 0.003 inch maintains consistent geometry across the cross section
• Minimum order quantity of one piece reduces excess material waste for single-use repairs

Compatibility

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

Installation Notes

Cutting and machining of pre-hardened 4142 alloy steel requires tooling rated for hardened stock; standard high-speed steel tooling may wear prematurely. Secure the workpiece firmly before cutting or grinding operations. Always wear appropriate personal protective equipment when cutting or grinding steel bar stock. Consult applicable shop safety codes and material safety data for this alloy before working in confined or poorly ventilated spaces.