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All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Nuts for Sheet Metal > Nuts – Types CLA, CLS, CLSS, H, HNL, S, SS, SMPS, SP, SMPP > Nuts – Types S, SS, CLS, CLSS, CLA, SP > Self-Clinching Nuts - Types S, SS, CLS, CLSS, SP - Metric > Part # S-M121ZC  
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Part # S-M121ZC, Self-Clinching Nuts - Types S, SS, CLS, CLSS, SP - 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.

Provide load-bearing threads in thin sheets with high pushout and torque-out resistance.

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.

Types CLS / CLSS are recommended for use in steel or aluminum sheets HRB (Rockwell "B" scale) 70 or less and HB (Hardness Brinell) 125 or less.

Types S / SS are recommended for use in steel or aluminum sheets HRB (Rockwell "B" scale) 80 or less and HB (Hardness Brinell) 150 or less.

Type SP is recommended for use in stainless steel sheets HRB (Rockwell "B" scale) 90 or less and HB (Hardness Brinell) 185 or less.




 Specifications   

Thread Size x Pitch
M12 x 1.75

Thread Code
M12

Shank Code
1

A (Shank) Max.

 View
3.05 mm

Rec. Min. Sheet Thickness1
3.18 mm

Hole Size in Sheet + 0.08
17 mm

C Max.
16.95 mm

E ± 0.25
20.57 mm

T ± 0.25
8.50 mm

Min. Dist. Hole C/L to Edge2
16 mm

For Use in Sheet Hardness3
HRB 80 / HB 150 or Less

Thread Specification
Internal, ASME B1.13M, 6H

Fastener Material
Heat-Treated Carbon Steel

Optional Finish
Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow

CAD Supplier
PennEngineering® (PEM®)

Thread Masking Plugs
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.


 MORE IMAGES 

·  CL Installation



 DOWNLOADS 

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PEMSERTER® Tooling Selector

Tightening Torque

PEM Bulletin CL


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