Type SMPP self-clinching nuts are for installation into ultra-thin sheets.
  • Installs into stainless steel sheets as thin as 0.64 mm.
  • Corrosion resistance similar to 300 series stainless steel.
  • Reduced outer dimensions and thinner sheet capabilities compared to type SP thread sizes.
  • Recommended for use in stainless steel sheets HRB 90 / HB 192 or less.
Unit of Measure

Thread Size x Pitch

N/A M3.5 x 0.6

Thread Code

N/A M3.5

A (Shank) Max.

N/A 0.61 mm a1383.jpg
Rec. Min. Sheet Thickness1 N/A 0.64 mm

Hole Size in Sheet + 0.08

N/A 4.75 mm

C Max.

N/A 4.73 mm

E ± 0.25

N/A 6.4 mm

T ± 0.25

N/A 1.4 mm
Min. Dist. Hole C/L to Edge2 N/A 5.5 mm
For Use in Sheet Hardness3 N/A HRB 90 / HB 192 or Less

Thread Specification

N/A Internal, ASME B1.13M, 6H

Fastener Material

N/A Age hardened A286 stainless steel (non-magnetic)

Standard Finish

N/A Passivated and/or tested per ASTM A380

CAD Supplier

N/A PennEngineering® (PEM®)
  • 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.