Magform专利螺丝
MAG-FORM®
Standard thread-forming fasteners can easily
exceed the ductility limits of low-ductile materials,
causing thread damage and excess debris.
Mag-Form® fasteners are specifically designed to
eliminate tapping operations while forming strong
threads ...
MAG-FORM®
Standard thread-forming fasteners can easily
exceed the ductility limits of low-ductile materials,
causing thread damage and excess debris.
Mag-Form® fasteners are specifically designed to
eliminate tapping operations while forming strong
threads in conventional magnesium die-castings
and similar materials, with minimal debris
generation and good serviceability.
STANDARD DESIGN GUIDELINES
• Sizes: MG1.6 to MG12
• Thread Design: Wide-spaced thread
with broad flank angle
• Head Design: Can be used with any
external or internal head designs
• Drive System: Can be used with all
systems, including TORX PLUS® Drive
• Finish: Zinc and chromate to
minimize galvanic corrosion
FEATURES
• Lobular configuration
• Wide-spaced thread design
• Broad flank angle compresses,
rather than roll-forms, threads
into the mating material
BENEFITS
• Minimizes debris generation
• Forms strong threads in materials
with low ductility
• Can easily be removed and
reinserted for service in the field
TYPICAL APPLICATIONS
• Automotive engines and transmissions;
airbag assemblies; mirrors; pedal brackets;
steering components
• Small engines
• Power tools
• Lawn and garden equipment
• Electronics
• Cellphones
• Computers
THREAD FORMING
FASTENERS
FOR MAGNES IUM
MINIMIZES DEBRIS GENERATION IN
CRITICAL APPLICATIONS
When driven into low-ductile materials, standard
thread-forming fasteners with a 60° flank angle,
create excess debris. They can easily exceed the
ductility limits of the material, causing damage to
the formed threads.
Mag-Form® thread-forming fasteners feature a
broader flank angle. When driven into low-ductile
materials, such as magnesium die-castings,
a compressive action forms strong threads in
the material with minimal debris generation.
Mag-Form® fasteners also allow multiple
removals and reinsertions, unlike standard
thread-forming fasteners.
Because they produce minimal debris during
installation, Mag-Form® fasteners are the optimal
solution for critical applications such as steering
components and air bag modules.
Mag-Form® Thread-
Forming Fasteners
Compressive action
forms strong threads
in low-ductile materials
Standard 60° Flank
Angle Thread-Forming
Fasteners
May exceed ductility limit of
the material, causing damage
to formed threads
From Semblex
®
Mag-Form® and TORX PLUS® are registered trademarks of Textron Inc.
• Minimum engagement length
of full threads is generally 2.5
times the basic screw diameter.
• Recommended engagement
length does not include lead
threads (2 pitch ref.)
• Typical hole engagement,
65-70%.
Screw
Size (1)
Boss
DiameterHole Diameter
Core Hole
Depth
Hole
Diameter
Distance to
Edge (2)
Through Hole
Depth
Min.Max. Min.Max. Min Min.
A B C D X Y Z
Nominal Min. Min.
mm
in
mm
in
mm
in
mm
in mm in mm in mm in mm in mm in
Drilled Hole
Footnotes:
1. Additional sizes available upon request.
2. Minimum distance to edge without measurable distortion.
Cored Hole
Mag-Form® Drilled Hole Casting
CORPORATION MAG-FORM ® HOLE SIZE DATA
Mag-Form® Cored Hole Casting
MG3-1.0 2.85 2.77 2.72 2.64 6.75 10.50 2.75 2.00 7.50
0.112 0.109 0.107 0.104 0.266 0.413 0.108 0.079 0.295
MG3.5-1.2 3.28 3.20 3.13 3.05 7.83 12.35 3.17 2.33 8.75
0.129 0.126 0.123 0.120 0.308 0.486 0.125 0.092 0.344
MG4-1.4 3.70 3.62 3.52 3.44 8.90 14.20 3.57 2.67 10.00
0.146 0.143 0.139 0.135 0.350 0.559 0.141 0.105 0.394
MG4.5-1.5 4.13 4.05 3.94 3.86 10.00 15.75 4.00 3.00 11.25
0.163 0.159 0.155 0.152 0.394 0.620 0.157 0.118 0.443
MG5-1.6 4.58 4.50 4.36 4.28 11.10 17.30 4.43 3.33 12.50
0.180 0.177 0.172 0.169 0.437 0.681 0.174 0.131 0.492
MG6-2.0 5.46 5.38 5.20 5.12 13.29 21.00 5.29 4.00 15.00
0.215 0.212 0.205 0.202 0.523 0.827 0.208 0.157 0.591
MG7-2.0 6.49 6.41 6.18 6.10 15.63 23.50 6.29 4.67 17.50
0.256 0.252 0.243 0.240 0.615 0.925 0.248 0.184 0.689
MG8-2.5 7.33 7.25 6.98 6.90 17.78 27.50 7.12 5.33 20.00
0.289 0.285 0.275 0.272 0.700 1.083 0.280 0.210 0.787
MG10-3.0 9.20 9.12 8.76 8.68 22.27 34.00 8.94 6.67 25.00
0.362 0.359 0.345 0.342 0.877 1.339 0.352 0.263 0.984
MG12-3.5 11.06 10.98 10.54 10.46 26.76 40.50 10.76 8.00 30.00
0.435 0.432 0.415 0.412 1.054 1.594 0.424 0.315 1.181
®
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