PennEngineering
PennEngineering
Corporate Headquarters – Danboro, PA
5190 Old Easton Rd.
Danboro, PA 18916
Phone: 215-766-8853
Toll-Free Phone: 1-800-237-4736 (U.S. only)
Email: info@pemnet.com
Website: www.pemnet.com
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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.
Flush-head studs - FH, FH4, FHA, FHP, FHS
Self-Clinching Threaded Studs - Type FH/FHS/FHA 2
Unit of Measure
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Part #

Thread Size

Hole Size in Sheet + .003 - .000

L - Length ± .015

H ± .015

Fastener Material

Standard Finish

Optional Finish

CAD

FH-256-4ZI N/A .086-56 (#2-56) N/A .085 in N/A .250 in N/A .144 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-440-4ZI N/A .112-40 (#4-40) N/A .111 in N/A .250 in N/A .176 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-632-4ZI N/A .138-32 (#6-32) N/A .137 in N/A .250 in N/A .206 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-832-4ZI N/A .164-32 (#8-32) N/A .163 in N/A .250 in N/A .237 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-256-5ZI N/A .086-56 (#2-56) N/A .085 in N/A .312 in N/A .144 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-440-5ZI N/A .112-40 (#4-40) N/A .111 in N/A .312 in N/A .176 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-632-5ZI N/A .138-32 (#6-32) N/A .137 in N/A .312 in N/A .206 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-832-5ZI N/A .164-32 (#8-32) N/A .163 in N/A .312 in N/A .237 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-024-5ZI N/A .190-24 (#10-24) N/A .189 in N/A .312 in N/A .256 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-032-5ZI N/A .190-32 (#10-32) N/A .189 in N/A .312 in N/A .256 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-256-6ZI N/A .086-56 (#2-56) N/A .085 in N/A .375 in N/A .144 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-440-6ZI N/A .112-40 (#4-40) N/A .111 in N/A .375 in N/A .176 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-632-6ZI N/A .138-32 (#6-32) N/A .137 in N/A .375 in N/A .206 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-832-6ZI N/A .164-32 (#8-32) N/A .163 in N/A .375 in N/A .237 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-024-6ZI N/A .190-24 (#10-24) N/A .189 in N/A .375 in N/A .256 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-032-6ZI N/A .190-32 (#10-32) N/A .189 in N/A .375 in N/A .256 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-0420-6ZI N/A .250-20 (1/4-20) N/A .249 in N/A .375 in N/A .337 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-256-8ZI N/A .086-56 (#2-56) N/A .085 in N/A .500 in N/A .144 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-440-8ZI N/A .112-40 (#4-40) N/A .111 in N/A .500 in N/A .176 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-632-8ZI N/A .138-32 (#6-32) N/A .137 in N/A .500 in N/A .206 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-832-8ZI N/A .164-32 (#8-32) N/A .163 in N/A .500 in N/A .237 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-024-8ZI N/A .190-24 (#10-24) N/A .189 in N/A .500 in N/A .256 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-032-8ZI N/A .190-32 (#10-32) N/A .189 in N/A .500 in N/A .256 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-0420-8ZI N/A .250-20 (1/4-20) N/A .249 in N/A .500 in N/A .337 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
FH-0518-8ZI N/A .313-18 (5/16-18) N/A .311 in N/A .500 in N/A .376 in N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A N/A CAD Icon (for items table)
Unit of Measure
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