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Precision Micro Screws
1.4 mm male-female super screw for PCB stacking, in alloy st
1.4mm High-Precision Male-Female Super Screw for PCB
- MaterialAlloy Structural Steel
- Installationsingle driving step for board stacking
- StandardGB/T 3098.1, GB/T 197
- Typical substratemultilayer PCBs and industrial boards
- Key inspectionsthread gauging, coaxiality, overall length
Product overviewOverview
The critical dimensions are coaxiality between internal and external threads and overall length. Going from 1.2 to 1.4 mm raises the thread size and with it the torque the joint will take, which matters where boards are stacked several high and the bottom joint carries the whole column. Height tolerance across the column then decides how evenly the boards are clamped.
Material: Alloy Structural Steel. It is driven in one pass to clamp the board stack.
Key featuresFeatures
- Larger thread takes more torque in tall stacks.
- Overall length made to the stack height, typically within ±0.05 mm.
- Alloy steel or stainless steel, up to class 12.9 where required.
- Lead-in chamfer on the internal thread helps blind assembly of the upper board.
Typical applicationsApplications
- Industrial motherboards and expansion boards
- Power modules and heatsink mounting
- Telecom chassis internal stacks
Selection notesSelection
Specify height tolerance for the assembled column, not for each screw; in a tall stack the errors accumulate at the last joint.
Frequently asked questionsFAQ
Why specify column height rather than screw length?
What matters during installation of the 1.4mm High-Precision Male-Female Super Screw for PCB?
| Material | Alloy Structural Steel |
|---|---|
| Property Class | Grade 12.9 |
| Standard | GB/T 3098.1, GB/T 197 |
| Installation | single driving step for board stacking |
| Typical substrate | multilayer PCBs and industrial boards |
| Key inspections | thread gauging, coaxiality, overall length |
Overall length and thread length are measured optically against drawing tolerance.Alternative materials and finishes can be quoted side by side during sampling, so cost and corrosion resistance can be traded off explicitly.
