Zygology
Zygology Ltd
Unit 7, Thame 40 Jane Morbey Road
Thame Oxon OX9 3RR
Phone: 0808 123 1221
Fax: +44 1844 266021
Email: sales@zygology.com
Web Address: www.zygology.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 for sheet thickness of .040” and 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

Specifications

Pin Dia. Code

 N/A 281

Length Code

 N/A 8
Min. Sheet Thickness1 N/A .093 in

Hole Size in Sheet + .003 - .000

 N/A .312 in
P - Nominal Pin Diameter ± .0022 N/A .281 in a1380.jpg

L - Length ± .015

 N/A .500 in

H ± .015

 N/A .380 in
S Max.3 N/A .160 in

Min. Dist. Hole C/L to Edge

 N/A .38 in

For Use in Sheet Hardness

 N/A HRB 70 / HB 125 or Less

Fastener Material

 N/A 300 Series Stainless Steel

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 Other pin diameters can be specified.
  • 3 Pin diameter may exceed max. in this region.