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Online literature contains the most current information available.
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.
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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

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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
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
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
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
FH-256-4ZC 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 N/A Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow N/A
FH-440-4ZC 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 N/A Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow N/A
FH-632-4ZC 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 N/A Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow N/A
FH-832-4ZC 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 N/A Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow N/A
FHS-256-4 N/A .086-56 (#2-56) N/A .085 in N/A .250 in N/A .144 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHS-440-4 N/A .112-40 (#4-40) N/A .111 in N/A .250 in N/A .176 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHS-632-4 N/A .138-32 (#6-32) N/A .137 in N/A .250 in N/A .206 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHS-832-4 N/A .164-32 (#8-32) N/A .163 in N/A .250 in N/A .237 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHA-440-4 N/A .112-40 (#4-40) N/A .111 in N/A .250 in N/A .176 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHA-632-4 N/A .138-32 (#6-32) N/A .137 in N/A .250 in N/A .206 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHA-832-4 N/A .164-32 (#8-32) N/A .163 in N/A .250 in N/A .237 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHA-440-5 N/A .112-40 (#4-40) N/A .111 in N/A .312 in N/A .176 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHA-632-5 N/A .138-32 (#6-32) N/A .137 in N/A .312 in N/A .206 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHA-832-5 N/A .164-32 (#8-32) N/A .163 in N/A .312 in N/A .237 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHA-024-5 N/A .190-24 (#10-24) N/A .189 in N/A .312 in N/A .256 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHA-032-5 N/A .190-32 (#10-32) N/A .189 in N/A .312 in N/A .256 in N/A Aluminum (Plain Finish) N/A No Finish N/A N/A
FHS-256-5 N/A .086-56 (#2-56) N/A .085 in N/A .312 in N/A .144 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHS-440-5 N/A .112-40 (#4-40) N/A .111 in N/A .312 in N/A .176 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHS-632-5 N/A .138-32 (#6-32) N/A .137 in N/A .312 in N/A .206 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHS-832-5 N/A .164-32 (#8-32) N/A .163 in N/A .312 in N/A .237 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
FHS-024-5 N/A .190-24 (#10-24) N/A .189 in N/A .312 in N/A .256 in N/A 300 Series Stainless Steel N/A Passivated and/or tested per ASTM A380 N/A N/A
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