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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.

FHL (flush low-displacement head) Studs install closer to the edge of a sheet than PEM Types FH/FHS studs without causing that edge to bulge.
  • Installs closer to the edge of a sheet than PEM Type FH/FHS studs without causing that edge to bulge.
  • Flush-head for sheet thickness .040” and greater.
  • Type FHL is recommended for use in steel or aluminum sheets HRB (Rockwell “B” Scale) 80 or less and HB (Hardness Brinell) 150 or less.
  • Type FHLS is recommended for use in steel or aluminum sheets HRB (Rockwell “B” Scale) 70 or less and HB (Hardness Brinell) 125 or less.
Unit of Measure

Thread Size

 N/A .086-56 (#2-56)

Thread Code

 N/A 256

Length Code

 N/A 5

Min. Sheet Thickness

 N/A .040 in

Hole Size in Sheet + .003 - .000

 N/A .085 in

Max. Hole in Attached Parts

 N/A .100 in

L - Length ± .015

 N/A .312 in a1376.jpg

H ± .015

 N/A .112 in
S Max.1 N/A .080 in

Min. Dist. Hole C/L to Edge

 N/A .098 in

For Use in Sheet Hardness

 N/A HRB 80 / HB 150 or less

Thread Specification

 N/A External, ANSI B1.1, 2A

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.