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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

Thread Size

.313-18 (5/16-18)

Thread Code

0518

Length Code

8

Min. Sheet Thickness

.075 in

Hole Size in Sheet + .005 - .000

.312 in

Max. Hole in Attached Parts

.375 in

L - Length ± .015

.500 in
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H ± .01

.480 in
S Max.1 .140 in

T Max.

.070 in

Min. Dist. Hole C/L to Edge

.500 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.