The Ampco Safety Tools M-42 is a 10-piece SAE non-sparking, non-magnetic hex key (Allen wrench) set — nickel aluminum bronze — stored in a fabric tool roll for use in 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 M-42 delivers outstanding durability even in the most corrosive conditions, including exposure to salt water, chemicals, and acids.

The M-42 hex key set 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

Number of pieces: 10

Size range: 1/16 in - 3/8 in

Standard: SAE

Storage: Fabric tool roll

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: 8204.11

COO: USA/Italy

FAQ

What sizes are included in the M-42 hex key set?

The set includes 10 SAE L-shaped hex keys ranging from 1/16" through 3/8", covering the most common Allen head fastener sizes in industrial maintenance.

What alloy are the hex keys made from?

The keys are nickel aluminum bronze — non-sparking, non-magnetic, Factory Mutual approved, and beryllium-free, with USA manufacturing and Italian component sourcing.

How is the set stored?

All 10 keys are stored in a fabric tool roll for organized, portable storage.

Are these hex keys as strong as steel?

Ampco non-sparking hex keys are designed for the torque required by standard industrial fasteners. Use the long arm for additional leverage. Avoid using extension pipes on the short arm.

Is the Ampco M-42 covered by a warranty?

Yes. All Ampco Safety Tools carry a lifetime warranty.