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  • Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS
  • Thru-Hole Unthreaded Standoffs - Types SO, SOA, SOS, SO4
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.
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B - Thru-hole Diameter + 0.1 - 0.08 (mm)

  • 3.1
  • 3.6
  • 4.1
  • 5.1

L - Length +0.05 –0.13 (mm)

Fastener Material

  • 300 Series Stainless Steel
  • Aluminum
  • Heat-Treated Carbon Steel

Standard Finish

  • Passivated and/or tested per ASTM A380
  • Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

Part #

Hole Size in Sheet + 0.08

B - Thru-hole Diameter + 0.1 - 0.08

C - 0.13

H Nom.

L - Length +0.05 –0.13

Fastener Material

Standard Finish

CAD

SO-43.1-3ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 3 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-4ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 4 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-6ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 6 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-8ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 8 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-10ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 10 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-12ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 12 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-14ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 14 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-16ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 16 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-18ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 18 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-43.1-20ZI N/A 4.22 mm N/A 3.1 mm N/A 4.2 mm N/A 4.8 mm N/A 20 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-3ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 3 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-4ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 4 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-6ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 6 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-8ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 8 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-10ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 10 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-12ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 12 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-14ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 14 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-16ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 16 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-18ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 18 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.1-20ZI N/A 5.41 mm N/A 3.1 mm N/A 5.39 mm N/A 6.4 mm N/A 20 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.6-3ZI N/A 5.41 mm N/A 3.6 mm N/A 5.39 mm N/A 6.4 mm N/A 3 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.6-4ZI N/A 5.41 mm N/A 3.6 mm N/A 5.39 mm N/A 6.4 mm N/A 4 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.6-6ZI N/A 5.41 mm N/A 3.6 mm N/A 5.39 mm N/A 6.4 mm N/A 6 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.6-8ZI N/A 5.41 mm N/A 3.6 mm N/A 5.39 mm N/A 6.4 mm N/A 8 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
SO-63.6-10ZI N/A 5.41 mm N/A 3.6 mm N/A 5.39 mm N/A 6.4 mm N/A 10 mm N/A Heat-Treated Carbon Steel N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
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