Drill Rod Tool Steels 81175986 Flat Stock 4142 Alloy Steel

Product Description

The DRILL ROD TOOL STEELS 81175986 is a pre-hardened alloy steel flat stock bar made to AISI/SAE Type 4142 specification. It measures 36 inches long, 1/2 inch wide, and 5/16 inch thick, with a weight of 1.59 pounds. Type 4142 is a chromium-molybdenum alloy steel known for its high strength, toughness, and fatigue resistance in the pre-hardened condition. This flat stock is suited for machining, fabrication, and tooling applications where a consistent cross-section and tight dimensional tolerances are required. Machinists, tool and die makers, and industrial fabricators work with this material in job shops and maintenance environments.

This flat stock is used in the production of jigs, fixtures, machine components, tooling plates, and wear parts. The pre-hardened condition eliminates the need for heat treatment after machining in many applications, making it a practical choice for moderate-duty tooling and structural components. It is appropriate for both light production runs and custom one-off fabrication tasks in industrial and maintenance-repair-operations settings.

Key Features

• AISI/SAE Type 4142 chromium-molybdenum alloy steel for high strength and toughness
• Pre-hardened condition - no post-machining heat treatment required for many applications
• Length tolerance of +0.250 inches allows precise cut-to-length flexibility
• Width tolerance of +0.005 inches and thickness tolerance of +0.001 inches for consistent cross-section
• Square tolerance of 0.003 inches ensures predictable geometric accuracy
• Weighs 1.59 pounds - manageable for bench and machine work

Compatibility

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

Installation Notes

Cutting and machining of hardened alloy steel requires appropriate tooling - use carbide-tipped cutting tools and observe recommended feeds and speeds for pre-hardened material. Personal protective equipment including eye protection and gloves is required during cutting and grinding operations. Consult applicable workplace safety standards before processing hardened steel stock. Secure the workpiece properly in a vise or fixture before any machining or cutting operation.