The Ampco Safety Tools M-42M is a 10-piece metric 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-42M delivers outstanding durability even in the most corrosive conditions, including exposure to salt water, chemicals, and acids.

The M-42M 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: 1.5, 2,3,4,5,6,7,8,9, and 10mm

Standard: metric

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-42M hex key set?

The M-42M includes 10 metric L-shaped hex keys. The exact metric size range is [VERIFY SIZE RANGE] — confirm with Ampco or your purchase records.

What alloy are the hex keys made from?

The keys are nickel aluminum bronze — non-sparking, non-magnetic, Factory Mutual approved, and beryllium-free.

How is the set stored?

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

Is this set Factory Mutual approved?

Yes. All tools conform to ASTM F2503 and ASTM A342.

Is the Ampco M-42M covered by a warranty?

Yes. All Ampco Safety Tools carry a lifetime warranty.