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.

HFH (heavy-duty) Studs replace weld studs with easier installationmore
Unit of Measure

Specifications

Thread Size

 .250-20 (1/4-20)

Thread Code

 0420

Length Code

 12
Min. Sheet Thickness1 .060 in

Hole Size in Sheet + .005 - .000

 .250 in

Max. Hole in Attached Parts

 .312 in

L - Length ± .015

 .750 in a1379.jpg

H ± .01

 .380 in
S Max.2 .125 in

T Max.

 .050 in

Min. Dist. Hole C/L to Edge

 .460 in

Thread Strength

 120 ksi

For Use in Sheet Hardness

 HRB 85 / HB 165 or Less

Thread Specification

 External, ANSI B1.1, 2A

Fastener Material

 Heat-Treated Carbon Steel

Standard Finish

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

CAD Supplier

 PennEngineering® (PEM®)
  • 1 For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
  • 2 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.