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PEM® self-clinching studs are installed by placing them in properly sized holes in the sheets and squeezing into place with any standard press. The squeezing action embeds the head of the stud into the sheet. The metal displaced by the head flows smoothly and evenly around the ribs and into the annular groove – creating a flushhead assembly and securely locking the stud into the sheet with high torque-out and pushout resistances.

FH (flush-head) studs are available in aluminum, steel, or stainless steel. They are also available unthreaded on special order.
  • Flush-head in designated minimum sheet thickness or greater.
  • Type FH is recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 80 or less and HB (Hardness Brinell) 150 or less.
  • Type FHS is recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 70 or less and HB (Hardness Brinell) 125 or less.
  • Type FHA is recommended for use in aluminum sheets HRB (Rockwell “B” scale) 50 or less and HB (Hardness Brinell) 82 or less.
Unit of Measure

Thread Size x Pitch

 N/A M3 x 0.5

Thread Code

 N/A M3

Length Code

 N/A 12

Min. Sheet Thickness

 N/A 1.0 mm

Hole Size in Sheet + 0.08

 N/A 3.0 mm

Max. Hole in Attached Parts

 N/A 3.60 mm

L - Length ± 0.4

 N/A 12 mm a1374.jpg

H ± 0.4

 N/A 4.6 mm
S Max.1 N/A 2.1 mm

Min. Dist. Hole C/L to Edge

 N/A 5.6 mm

For Use in Sheet Hardness

 N/A HRB 80 / HB 150 or less

Thread Specification

 N/A External, ASME B1.13M, 6g

Fastener Material

 N/A Heat-Treated Carbon Steel

Standard Finish

 N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

CAD Supplier

 N/A PennEngineering® (PEM®)
  • 1 Threads are gageable to within 2 pitches of the “S” Max. dimension. A class 3B/5H maximum material commercial nut shall pass up to the “S” Max. dimension.

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