Part # HFG8-0420-12ZI, High-Tensile Strength Studs - Types HFG8™, HF109™

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	N/A .250-20 (1/4-20)
Thread Code	N/A 0420
Length Code	N/A 12
Min. Sheet Thickness	N/A .040 in
Hole Size in Sheet + .005 - .000	N/A .250 in
Max. Hole in Attached Parts	N/A .340 in
L - Length ± .015¹	N/A .750 in
H ± .01	N/A .507 in
S Max.	N/A .125 in
T Max.	N/A .090 in
Min. Dist. Hole C/L to Edge²	N/A .709 in
For Use in Sheet Hardness	N/A HRB 89 / HB 180 or Less
Thread Specification	N/A External, ANSI B1.1, 2A
Fastener Material	N/A Heat-Treated Medium Carbon Alloy Steel
Standard Finish	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
CAD Supplier	N/A PennEngineering® (PEM®)
Inventory	N/A

¹ Other lengths available up to a maximum of 1.5” (unified) on special order.
² To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.

Specifications

Thread Size

Thread Code

Length Code

Min. Sheet Thickness

Hole Size in Sheet + .005 - .000

Max. Hole in Attached Parts

H ± .01

S Max.

T Max.

For Use in Sheet Hardness

Thread Specification

Fastener Material

Standard Finish

CAD Supplier

Inventory