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These standoffs, which use the proven self-clinching design, install with a squeeze in properly sized round holes - and become permanently mounted in the thin sheet.

Unthreaded standoffs are also available for spacing multi-panel assemblies.
Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS
Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS, SO4
Unit of Measure
Items Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS
SO-43.1-3ZI
Thru-Hole Unthreaded Standoffs - Types SO, SOA SOS - Metric
Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS
SO-43.1-4ZI
Thru-Hole Unthreaded Standoffs - Types SO, SOA SOS - Metric
Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS
SO-43.1-6ZI
Thru-Hole Unthreaded Standoffs - Types SO, SOA SOS - Metric
Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS
SO-43.1-8ZI
Thru-Hole Unthreaded Standoffs - Types SO, SOA SOS - Metric
Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS
SO-43.1-10ZI
Thru-Hole Unthreaded Standoffs - Types SO, SOA SOS - Metric
Description N/A These standoffs, which use the proven self-clinching design, install with a squeeze in properly sized round holes - and become permanently mounted in the thin sheet.

Unthreaded standoffs are also available for spacing multi-panel assemblies.
Thru-Hole Code N/A 43.1
Length Code N/A 3 N/A 4 N/A 6 N/A 8 N/A 10
Material Code N/A
Min. Sheet Thickness N/A 1 mm
Hole Size in Sheet + 0.08 N/A 4.22 mm
B - Thru-hole Diameter + 0.1 - 0.08 N/A 3.1 mm a1350_1.jpg
C - 0.13 N/A 4.2 mm
H Nom. N/A 4.8 mm
L - Length +0.05 –0.131 N/A 3 mm N/A 4 mm N/A 6 mm N/A 8 mm N/A 10 mm
Min. Dist. Hole C/L to Edge2 N/A 6 mm
For Use in Sheet Hardness3 N/A HRB 80 / HB 150 or less
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®)
Inventory N/A {0} N/A {0} N/A {0} N/A {0} N/A {0}
  • 1 The “L” dimension is the height of the installed stud at max grip. The height of the stud will increase if it is installed into thinner material. To calculate “actual L” use this formula: max grip - actual grip + L = “actual L”
  • 2 To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.
  • 3 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.