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All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Studs and Pins for Sheet Metal > Heavy Duty Studs, Non Flush – Types HFH, HFHB, HFE, HFHS, THFE > Heavy Duty Studs, non Flush – Type HFE > High-Strength Studs for Thin Sheets - Type HFE - Unified > Part # HFE-0518-20ZI  

Part # HFE-0518-20ZI, High-Strength Studs for Thin Sheets - Type HFE - Unified

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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.

HFE (heavy-duty) Studs are designed with an enlarged head diameter which projects above the sheet material and provides maximum pull through in sheets as thin as .040”.
  • Enlarged head diameter provides high-strength in sheets as thin as .040”.
  • Recommended for use in steel or aluminum sheets HRB (Rockwell “B” Scale) 85 or less and HB (Hardness Brinell) 165 or less.




 Specifications   

Thread Size
.313-18 (5/16-18)

Thread Code
0518

Length Code
20

Min. Sheet Thickness
.060 in

Hole Size in Sheet + .005 - .000
.312 in

L - Length ± .015

 View
1.25 in

H ± .01
.586 in

S Max.1
.133 in

T Max.
.083 in

Max. Hole in Attached Parts
.402 in

Min. Dist. Hole C/L to Edge
.560 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 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.


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·  HFE_Installed



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