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Alloy Steel Hex Keys

Alloy steel hex keys, commonly known as Allen wrenches or hex key wrenches, are precision tools designed for installing and removing socket head cap screws, socket set screws, button head socket cap screws, flat head socket cap screws, shoulder screws, and other fasteners with internal hex drives. Their compact L-shaped design provides access to recessed fasteners in applications where conventional wrenches or sockets cannot be used.

Manufactured from alloy steel, these hex keys are intended for demanding industrial maintenance, manufacturing, assembly, and repair applications. They are commonly used throughout industrial machinery, automation equipment, robotics, tooling, fixtures, maintenance departments, machine shops, production facilities, OEM manufacturing, and field service operations. Hex keys are an essential tool for installing and servicing internally driven fasteners across a wide range of mechanical assemblies.

Proper tool selection should consider the required hex size, available installation clearance, fastener accessibility, and application requirements. Individual product pages provide verified hex key sizes and additional dimensional information where available to assist engineers, maintenance professionals, and purchasing teams in selecting the appropriate tool.

Cold Headers supplies alloy steel hex keys in a broad range of inch sizes to support socket head cap screws, button head socket cap screws, flat head socket cap screws, socket set screws, shoulder screws, and other internally driven fasteners. Our catalog is organized to simplify exact-size selection while providing consistent engineering information across every product family.

Why Choose Alloy Steel Hex Keys?

  • Designed for internal hex fasteners: Suitable for socket head cap screws, socket set screws, button head, flat head, and shoulder screws.
  • L-shaped design: Provides access to recessed fasteners in confined spaces.
  • Alloy steel construction: Intended for demanding industrial assembly and maintenance applications.
  • Wide industrial use: Commonly used in manufacturing, maintenance, automation, machine shops, tooling, and OEM production.
  • Verified sizing: Product pages provide hex key size information where available.

Selecting the Correct Hex Key

Begin by confirming the required hex size for the mating fastener. Review installation clearance, fastener accessibility, tool length, and application requirements before selecting a hex key. Proper tool selection helps ensure efficient installation and maintenance of internally driven fasteners.

Cold Headers Inc. has supplied specialty industrial fasteners and related products since 1962. Our catalog helps engineers, distributors, maintenance professionals, and purchasing teams locate exact sizes and difficult-to-find industrial fastening products without unsupported inventory claims.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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Unit of Measure
1 2 

Item #

Item Name

Type

Width Across the Flats

Material

Quantity

List Price (per 100 pieces)

1/16 LHK Alloy Steel N/A 1/16 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 1/16 in N/A Alloy Steel N/A 100 $4.50
5/64 LHK Alloy Steel N/A 5/64 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 5/64 in N/A Alloy Steel N/A 100 $4.90
3/32 LHK Alloy Steel N/A 3/32 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 3/32 in N/A Alloy Steel N/A 100 $10.00
7/64 LHK Alloy Steel N/A 7/64 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 7/64 in N/A Alloy Steel N/A 100 $11.00
1/8 LHK Alloy Steel N/A 1/8 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 1/8 in N/A Alloy Steel N/A 100 $19.00
9/64 LHK Alloy Steel N/A 9/64 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 9/64 in N/A Alloy Steel N/A 100 $20.00
5/32 LHK Alloy Steel N/A 5/32 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 5/32 in N/A Alloy Steel N/A 100 $24.00
3/16 LHK Alloy Steel N/A 3/16 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 3/16 in N/A Alloy Steel N/A 100 $25.00
7/32 LHK Alloy Steel N/A 7/32 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 7/32 in N/A Alloy Steel N/A 100 $62.00
1/4 LHK Alloy Steel N/A 1/4 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 1/4 in N/A Alloy Steel N/A 100 $63.00
5/16 LHK Alloy Steel N/A 5/16 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 5/16 in N/A Alloy Steel N/A 100 $65.00
3/8 LHK Alloy Steel N/A 3/8 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 3/8 in N/A Alloy Steel N/A 50 $140.00
7/16 LHK Alloy Steel N/A 7/16 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 7/16 in N/A Alloy Steel N/A 50 $160.00
1/2 LHK Alloy Steel N/A 1/2 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 1/2 in N/A Alloy Steel N/A 25 $450.00
9/16 LHK Alloy Steel N/A 9/16 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 9/16 in N/A Alloy Steel N/A 25 $475.00
5/8 LHK Alloy Steel N/A 5/8 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 5/8 in N/A Alloy Steel N/A 25 $500.00
3/4 LHK Alloy Steel N/A 3/4 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 3/4 in N/A Alloy Steel N/A 10 $19.00
7/8 LHK Alloy Steel N/A 7/8 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 7/8 in N/A Alloy Steel N/A 10 $26.00
1 LHK Alloy Steel N/A 1 Long Arm Alloy Steel Hex Key N/A Long Arm N/A 1 in N/A Alloy Steel N/A 10 $30.00
Unit of Measure
1 2