The Ampco Safety Tools W-71 is a 8 in. non-sparking, non-magnetic adjustable end wrench — 1-1/8 in maximum jaw opening — machined entirely from nickel aluminum bronze alloy, engineered for hazardous work environments.

Manufactured in the USA and Factory Mutual approved, it is beryllium-free and built for professionals who work around flammable or combustible vapors, liquids, dust, or residue where a standard steel tool could trigger a dangerous spark. Its non-magnetic properties make it safe for use near highly sensitive magnetic equipment, including MRI and clean room environments, and it conforms to ASTM F2503 and ASTM A342 standards.

Unlike conventional steel tools, the Ampco W-71 delivers outstanding durability even in the most corrosive conditions, including exposure to salt water, chemicals, and acids.

The W-71 adjustable wrench is the go-to choice for oil and gas, petrochemical, mining, military, and industrial maintenance applications where worker safety and tool reliability are non-negotiable.

Specifications

Overall length: 8 in (203 mm)

Maximum jaw opening: 1-1/8 in

FM Approved: Yes

Availability: Typically in stock. If your item is unavailable at the time of order, we will contact you promptly to confirm lead times and discuss alternatives.

HS Code: 8204.12

COO: USA

FAQ

What alloy is the Ampco W-71 made from?

The entire wrench — including the adjustable jaw mechanism — is machined from Ampco's nickel aluminum bronze alloy: non-sparking, non-magnetic, Factory Mutual approved, and beryllium-free.

Is this wrench safe near MRI equipment?

Yes. The non-magnetic nickel aluminum bronze alloy is independently tested for MRI environments up to 3-Tesla static fields.

Can this wrench be used in saltwater or chemical environments?

Yes. Aluminum bronze has excellent resistance to seawater corrosion and most industrial chemicals, making the W-71 ideal for offshore and chemical plant applications.

What is the maximum jaw opening?

See the Opening/Size specification above.

Is the Ampco W-71 covered by a warranty?

Yes. All Ampco Safety Tools carry a lifetime warranty.