PennEngineering - Self-Clinching Nuts - Type CLA - Metric

Self-clinching nuts are installed by placing them in properly sized holes in sheets and applying a parallel squeezing force to the head of the nut. The sheet metal surrounding the head cold flows into an undercut thereby making the fastener an integral part of the sheet. A serrated clinching ring prevents the fastener from rotating after installation.

Type CLA is recommended for use in steel or aluminum sheets HRB (Rockwell "B" scale) 50 or less and HB (Hardness Brinell) 82 or less.

Unplated threads are sized to accept a basic go gauge after .00025” plating.

Unit of Measure

Items	CLA-M2-1 Self-Clinching Nuts - Type CLA - Metric	CLA-M3-1 Self-Clinching Nuts - Type CLA - Metric	CLA-M3.5-1 Self-Clinching Nuts - Type CLA - Metric	CLA-M4-1 Self-Clinching Nuts - Type CLA - Metric	CLA-M5-1 Self-Clinching Nuts - Type CLA - Metric
Description	N/A Type CLA aluminum nuts are recommended for use in aluminum sheet with a hardness of HRB 50 or less on the Rockwell “B” scale. Unplated threads are sized to accept a basic go gauge after .00025” plating.
Thread Size x Pitch	N/A M2 x 0.4	N/A M3 x 0.5	N/A M3.5 x 0.6	N/A M4 x 0.7	N/A M5 x 0.8
Thread Code	N/A M2	N/A M3	N/A M3.5	N/A M4	N/A M5
Shank Code	N/A 1
A (Shank) Max.	N/A 0.98 mm
Min. Sheet Thickness¹	N/A 1 mm
Hole Size in Sheet + 0.08	N/A 4.22 mm	N/A 4.75 mm	N/A 5.41 mm	N/A 5.94 mm	N/A 7.52 mm
C Max.	N/A 4.2 mm	N/A 4.73 mm	N/A 5.38 mm	N/A 5.92 mm	N/A 7.49 mm
E ± 0.25	N/A 6.35 mm	N/A 6.35 mm	N/A 7.11 mm	N/A 7.8 mm	N/A 9.4 mm
T ± 0.25	N/A 1.5 mm	N/A 2 mm	N/A 2 mm	N/A 3.00 mm	N/A 3.80 mm
Min. Dist. Hole C/L to Edge²	N/A 4.8 mm	N/A 5.6 mm	N/A 6.9 mm	N/A 7.1 mm	N/A 7.9 mm
For Use in Sheet Hardness³	N/A HRB 50 / HB 82 or less
Thread Specification	N/A Internal, ASME B1.13M, 6H
Fastener Material	N/A Aluminum
Standard Finish	N/A None
¹ For maximum performance, we recommend that you use the maximum shank length for your sheet thickness. ² To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified. ³ HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.