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Ampco non-sparking metric hex key, 4 mm tip, 70 mm long arm, unfinished finish

Ampco

Ampco WH-4MM Metric Hex Key 4 mm 70 mm

SKU CH-RW33-611K0

A 4 mm metric hex key with a 70 mm long arm and 25 mm short arm, non-sparking, non-magnetic and corrosion resistant

  • TypeHex/Torx Keys
  • Non-sparking construction prevents ignition in hazardous areas
  • Non-magnetic material avoids interference with sensitive equipment
  • Corrosion-resistant finish extends service life in harsh environments
  • Short 25 mm arm provides leverage in tight spaces
  • 70 mm long arm delivers reach for deep fasteners

4 mm Hex Key for Metric Fasteners

This 4 mm hex key fits metric socket-head screws in maintenance and assembly tasks. Its short-arm format suits confined spaces where a longer lever cannot turn. The tool is supplied new and ready for immediate use in workshops or field kits.

70 mm Long Arm and 25 mm Short Arm

The long arm measures 70 mm, giving reach into recessed heads, while the 25 mm short arm provides extra torque when clearance allows. Both ends carry the same 4 mm tip, so the key handles the same fastener size from either side. Very deep or high-torque joints may need a longer bar or a ratchet driver.

Non-Sparking Non-Magnetic Corrosion-Resistant Finish

The unfinished, non-sparking alloy prevents ignition in flammable atmospheres and avoids magnetic interference with sensitive equipment. Corrosion resistance extends service life in damp or chemical environments. The key has no tether point and is not insulated, so it is not suited for live electrical work or drop-prevention requirements.

Highlights

  • Non-sparking construction prevents ignition in hazardous areas
  • Non-magnetic material avoids interference with sensitive equipment
  • Corrosion-resistant finish extends service life in harsh environments
  • Short 25 mm arm provides leverage in tight spaces
  • 70 mm long arm delivers reach for deep fasteners

Specifications

BrandAMPCO
TypeHex/Torx Keys

Questions about this item

Will the 4 mm tip fit the metric fasteners on my older equipment?

The 4 mm metric tip is sized for standard 4 mm hex sockets, so it will engage any correctly threaded 4 mm fastener on legacy gear.

How can I confirm the key is non-sparking and non-magnetic once I start using it?

The tool is made from a non-sparking, non-magnetic alloy; it will not produce sparks on impact and a magnet will not cling to either arm.

Does the package include both the long and short arms, or must I buy a second key?

One key provides both the 70 mm long arm and the 25 mm short arm; nothing else is required for 4 mm hex work.

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