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The Bellville washer shaped head of the microPEM® FlexTack™ fastener is designed to increase vertical installation tolerance in designs.

  • Alternative to using micro-screws, eliminating the need to tap or use threaded inserts.
  • Installation time to simply press the part in (1.5 seconds) is less than the time to thread a screw in equals less total installed cost.
  • The Belleville-shaped head allows for stack-up tolerance relief in a design.
  • Eliminates the following:

    • - Cost of screw, patch to prevent loosening, threaded insert or tapped hole and driver bits
    - Cost of rework due to cross-threading or driver bit “cam-out”
Unit of Measure

Fastener Material

 N/A Aluminum

Base Panel Hole Size Code

 N/A 10

Top Sheet Thickness Code

 N/A 035

Top Sheet Thickness

 N/A 0.28 to 0.38 mm.011 to .015 in
Base Panel Min. Sheet Thickness1 N/A 0.89 mm.035 in

Top Sheet Hole Size ± 0.05mm/± .002in

 N/A 1.47 mm.058 in

Base Panel Hole Size -0.05mm/ -.002in

 N/A 1.02 mm.040 in

A ± 0.025mm/±.001in

 N/A 0.77 mm.030 in TFA-microPEM-FLEXTACK-FASTENERS_Dimensions.JPG

B ± 0.075mm/±.003in

 N/A 1.26 mm.050 in

C Max.

 N/A 0.89 mm.035 in

H ± 0.10mm/±.004in

 N/A 2.91 mm.115 in

P ± 0.05mm/±.002in

 N/A 1.21 mm.048 in

T ± 0.10mm/±.004in

 N/A 0.3 mm.012 in

Min. Dist. Hole C/L to Edge

 N/A 1 mm.039 in

Standard Finish

 N/A Plain

For Use in Sheet Hardness

 N/A HRB 45 or Less (Hardness Rockwell “B” Scale)
HB 84 or Less (Hardness Brinell)

CAD Supplier

 N/A PennEngineering® (PEM®)
  • 1 0.89 mm / .035” for blind holes and 0.5 mm / .020” for through holes.