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Metric Hex Keys

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

Metric hex keys are commonly used throughout industrial machinery, automation equipment, robotics, manufacturing equipment, tooling, fixtures, maintenance departments, machine shops, production facilities, OEM manufacturing, and field service operations. They are an essential tool for assembling, servicing, and maintaining equipment utilizing metric internal hex fasteners.

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

Cold Headers supplies metric hex keys in a broad range of metric sizes for use with metric 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 Metric Hex Keys?

  • Designed for metric internal hex fasteners: Suitable for metric 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.
  • Industrial applications: Commonly used in manufacturing, maintenance, automation, robotics, tooling, and OEM production.
  • Serviceable design: Suitable for assembly, maintenance, repair, and equipment servicing.
  • Verified sizing: Product pages provide metric hex key size information where available.

Selecting the Correct Metric Hex Key

Begin by confirming the required metric 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 metric 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 metric 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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Size (mm)

Item #

Item Name

Size

Quantity

List Price (per 100 pieces)

N/A 1.5 mm Metric Hex Key N/A 1.5 mm N/A 100 $20.00
N/A 2 mm Metric Hex Key N/A 2 mm N/A 100 $22.50
N/A 2.5 mm Metric Hex Key N/A 2.5 mm N/A 100 $25.00
N/A 3 mm Metric Hex Key N/A 3 mm N/A 100 $28.75
N/A 4 mm Metric Hex Key N/A 4 mm N/A 100 $32.50
N/A 5 mm Metric Hex Key N/A 5 mm N/A 100 $41.25
N/A 6 mm Metric Hex Key N/A 6 mm N/A 100 $62.50
N/A 7 mm Metric Hex Key N/A 7 mm N/A 100 $105.00
N/A 8 mm Metric Hex Key N/A 8 mm N/A 100 $106.25
N/A 10 mm Metric Hex Key N/A 10 mm N/A 50 $177.50
N/A 12 mm Metric Hex Key N/A 12 mm N/A 50 $316.25
N/A 14 mm Metric Hex Key N/A 14 mm N/A 25 $456.25
N/A 17 mm Metric Hex Key N/A 17 mm N/A 25 $608.75
N/A 19 mm Metric Hex Key N/A 19 mm N/A $1,013.75
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