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Ampco 7420 fixed spanner wrench, 11-1/4 in long, bronze finish

Ampco

Ampco 7420 Fixed Spanner Wrench 11-1/4 in

SKU CH-6H20-WEFBV

Non-sparking fixed spanner wrench in aluminium-bronze, 11-1/4 in overall length

  • TypeSpanner Wrenches
  • Non-sparking safety for hazardous environments
  • Fixed 11-1/4 in length gives consistent leverage
  • Hook thickness 5/16 in grips fastener flats securely
  • Hook depth 3/16 in engages nuts without slipping
  • Aluminium bronze construction resists corrosion and wear

Fixed Spanner Wrench 7420

The Ampco 7420 is a non-adjustable fixed spanner wrench with an overall length of 11-1/4 in. It is made from an aluminium-bronze alloy with a nickel finish for corrosion resistance and non-sparking properties. The hook measures 5/16 in thick and 3/16 in deep for positive engagement.

Mechanics needing non-sparking safety tools

This wrench suits maintenance staff in chemical plants, refineries or marine environments where ferrous tools pose a fire or explosion risk. It is not for technicians who require an adjustable jaw to fit multiple fastener sizes or who need a ratcheting mechanism for speed.

Single fastener size engagement

The fixed hook handles one specific nut or collar diameter reliably in hazardous areas. It runs out when the fastener falls outside that exact profile, forcing the user to carry a full set of fixed spanners for different sizes. The 11-1/4 in length provides moderate leverage without excessive bulk.

Highlights

  • Non-sparking safety for hazardous environments
  • Fixed 11-1/4 in length gives consistent leverage
  • Hook thickness 5/16 in grips fastener flats securely
  • Hook depth 3/16 in engages nuts without slipping
  • Aluminium bronze construction resists corrosion and wear

Specifications

BrandAMPCO
TypeSpanner Wrenches

Questions about this item

What size nut or bolt head does the 11-1/4 in spanner wrench fit?

The hook thickness is 5/16 in and hook depth is 3/16 in, so it engages fasteners with matching slot dimensions.

Can this fixed spanner be used on adjustable fastener sizes?

No, the wrench is not adjustable and only fits the specific hook profile stamped into the tool.

How do I verify the wrench is seated correctly on the fastener?

The hook should sit fully into the slot with the 5/16 in thickness and 3/16 in depth engaged without play.

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