PennEngineering - Low-Displacement Head Studs - Types FHL, FHLS - Metric

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.

FHL (flush low-displacement head) Studs install closer to the edge of a sheet than PEM Types FH/FHS studs without causing that edge to bulge.

Installs closer to the edge of a sheet than PEM Type FH/FHS studs without causing that edge to bulge.
Flush-head for sheet thickness 1.00 mm and greater.
Type FHL is recommended for use in steel or aluminum sheets HRB (Rockwell “B” Scale) 80 or less and HB (Hardness Brinell) 150 or less.
Type FHLS is recommended for use in steel or aluminum sheets HRB (Rockwell “B” Scale) 70 or less and HB (Hardness Brinell) 125 or less.

Flush-head, low displacement studs - FHL, FHLS

Low-Displacement Head Studs - Types FHL, FHLS 2

Unit of Measure

Items	FHL-M2.5-6ZI Low-Displacement Head Studs - Types FHL, FHLS - Metric	FHL-M3-6ZI Low-Displacement Head Studs - Types FHL, FHLS - Metric	FHL-M3.5-6ZI Low-Displacement Head Studs - Types FHL, FHLS - Metric	FHL-M4-6ZI Low-Displacement Head Studs - Types FHL, FHLS - Metric	FHL-M2.5-8ZI Low-Displacement Head Studs - Types FHL, FHLS - Metric
Thread Size x Pitch	N/A M2.5 x 0.45	N/A M3 x 0.5	N/A M3.5 x 0.6	N/A M4 x 0.7	N/A M2.5 x 0.45
Thread Code	N/A M2.5	N/A M3	N/A M3.5	N/A M4	N/A M2.5
Length Code	N/A 6	N/A 6	N/A 6	N/A 6	N/A 8
Material Code	N/A
Min. Sheet Thickness	N/A 1.0 mm
Hole Size in Sheet + 0.08	N/A 2.5 mm	N/A 3.0 mm	N/A 3.5 mm	N/A 4 mm	N/A 2.5 mm
Max. Hole in Attached Parts	N/A 2.90 mm	N/A 3.40 mm	N/A 3.90 mm	N/A 4.40 mm	N/A 2.90 mm
L - Length ± 0.4	N/A 6 mm	N/A 6 mm	N/A 6 mm	N/A 6 mm	N/A 8 mm
H ± 0.4	N/A 3.15 mm	N/A 3.65 mm	N/A 4.15 mm	N/A 4.65 mm	N/A 3.15 mm
S Max.¹	N/A 2.1 mm	N/A 2.1 mm	N/A 2.30 mm	N/A 2.4 mm	N/A 2.1 mm
Min. Dist. Hole C/L to Edge	N/A 2.80 mm	N/A 3.3 mm	N/A 3.80 mm	N/A 4.3 mm	N/A 2.80 mm
For Use in Sheet Hardness	N/A HRB 80 / HB 150 or less
Thread Specification	N/A External, ASME B1.13M, 6g
Fastener Material	N/A Heat-Treated Carbon Steel
Standard Finish	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
CAD Supplier	N/A 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.