MAG-FORM® THREAD-FORMING FASTENERS0 pages

MAG-FORM® THREAD-FORMING FASTENERS
MINIMIZE DEBRIS GENERATION IN CRITICAL APPLICATIONS
Standard thread-forming fasteners with a 60° flank angle create excess
debris when driven into low-ductile materials. They can easily exceed the
ductility limits of the material, causing damage to the formed threads.
Mag-Form® fasteners are specifically designed with a broader flank angle
to eliminate tapping operations while forming strong threads in
conventional magnesium die-castings and similar materials. The design
also minimizes debris, making Mag-Form® fasteners the optimal solution
for critical applications such as electronics and air bag modules.

Features
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BREAKTHROUGH SOLUTION
Acument® worked with one of
the world’s largest Tier automotive
suppliers, a supplier devoted exclusively
to the production of magnesium
castings, to help them install the first
magnesium shift tower in a production
vehicle.

Broad Flank Angle

Wide-Spaced Threads

Benefits
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The Tier supplier faced several design,
engineering and assembly decisions
for the four fastening points where the
shift tower would be installed in the
steel floor of the vehicle’s “body-inwhite” frame. These would be the only
holes in the part, and the holes and the
fastening system all had to be perfect.
Rather than drilling the holes after the
casting process – a high cost and timeconsuming procedure – the holes in the
shift tower were molded during casting.
The Tier supplier chose Acument® to
develop the perfect fastener solution
– a thread-forming Mag-Form®
fastener developed specifically for
the shift tower application: one that
would fit the specs for the shift tower
holes and allow follow-up removal
and reinstallation over the life of the
vehicle.

Lobular configuration
Wide-spaced thread design
Broad flank angle that compresses, rather than roll-forms threads into
the mating material

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Minimizes debris generation
Forms strong threads in materials with low ductility
Allows multiple removals and reinsertions, unlike standard fasteners
Easily removed and reinserted for field service

Standard 60° Flank Angle
Thread-Forming Fasteners
May exceed ductility limit of the material,
causing damage to formed threads

Mag-Form® Thread-Forming Fasteners
Compressive action forms strong
threads in low-ductile materials

Standard Design Guidelines
Sizes:
Thread Design:
Head Design:
Drive System:
Finish:

MG1.0 to MG16
Wide-spaced thread with broad flank angle
Can be used with any external or internal head designs
Can be used with all systems, including the
TORX PLUS® Drive System
zinc and chromate to minimize galvanic corrosion