SO Thru Hole Unthreaded Standoffs

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Thru Hole Unthreaded Standoffs SO-U

Self Clinching Fasteners • Standoffs For Sheet Metal
American Standard (Inches) & Metric Sizes

UNICORP Electronic Hardware Self-Clinching Fasteners - Thru - Hole Unthreaded SO, SOS, SOA

• Self-clinching • Unthreaded • Installed quickly and easily in metal panels as thin as 0.040" /1.00 mm
• Installed using pneumatic, hydraulic, or mechanical press • No secondary operation needed prior to installation
• With thru-hole standoff, outer sheet surface is flush but not closed

American Standard Sizes: • Series SO-U

Metric Sizes: • Series SO-U

Series SO-U

Series SO-U / American Standard Sizes

• Head Shape- Hex • Sheet Hardness- HRB 80 / HB 150 or Less • Material- Heat-Treated Carbon Steel • Finish- Zinc Clear Plated per ASTM B633
	Series SO-U American Standard Sizes (SAE)

Part
Number

"H"
Nom.

"L"
Body
Length

"B"
Thru-Hole
Diameter

Min.
Sheet
Thickness

Hole
Size in
Sheet

"C"
Barrel
O.D.

Min.
Distance
to Edge

Mil-Spec

SO-4116-4ZI-U

3/16"

0.125"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-6ZI-U

3/16"

0.187"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-8ZI-U

3/16"

0.250"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-10ZI-U

3/16"

0.312"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-12ZI-U

3/16"

0.375"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-14ZI-U

3/16"

0.437"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-16ZI-U

3/16"

0.500"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-18ZI-U

3/16"

0.562"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-20ZI-U

3/16"

0.625"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-22ZI-U

3/16"

0.687"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-4116-24ZI-U

3/16"

0.750"

0.116"

0.040"

0.166"

0.165"

0.230"

N/A

SO-6116-4ZI-U

1/4"

0.125"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-6ZI-U

1/4"

0.187"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-8ZI-U

1/4"

0.250"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-10ZI-U

1/4"

0.312"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-12ZI-U

1/4"

0.375"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-14ZI-U

1/4"

0.437"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-16ZI-U

1/4"

0.500"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-18ZI-U

1/4"

0.562"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-20ZI-U

1/4"

0.625"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-22ZI-U

1/4"

0.687"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6116-24ZI-U

1/4"

0.750"

0.116"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-4ZI-U

1/4"

0.125"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-6ZI-U

1/4"

0.187"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-8ZI-U

1/4"

0.250"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-10ZI-U

1/4"

0.312"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-12ZI-U

1/4"

0.375"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-14ZI-U

1/4"

0.437"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-16ZI-U

1/4"

0.500"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-18ZI-U

1/4"

0.562"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-20ZI-U

1/4"

0.625"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-22ZI-U

1/4"

0.687"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-6143-24ZI-U

1/4"

0.750"

0.143"

0.040"

0.213"

0.212"

0.270"

N/A

SO-8143-4ZI-U

5/16"

0.125"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-6ZI-U

5/16"

0.187"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-8ZI-U

5/16"

0.250"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-10ZI-U

5/16"

0.312"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-12ZI-U

5/16"

0.375"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-14ZI-U

5/16"

0.437"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-16ZI-U

5/16"

0.500"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-18ZI-U

5/16"

0.562"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-20ZI-U

5/16"

0.625"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-22ZI-U

5/16"

0.687"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8143-24ZI-U

5/16"

0.750"

0.143"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-4ZI-U

5/16"

0.125"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-6ZI-U

5/16"

0.187"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-8ZI-U

5/16"

0.250"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-10ZI-U

5/16"

0.312"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-12ZI-U

5/16"

0.375"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-14ZI-U

5/16"

0.437"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-16ZI-U

5/16"

0.500"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-18ZI-U

5/16"

0.562"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-20ZI-U

5/16"

0.625"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-22ZI-U

5/16"

0.687"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8169-24ZI-U

5/16"

0.750"

0.169"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-4ZI-U

5/16"

0.125"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-6ZI-U

5/16"

0.187"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-8ZI-U

5/16"

0.250"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-10ZI-U

5/16"

0.312"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-12ZI-U

5/16"

0.375"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-14ZI-U

5/16"

0.437"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-16ZI-U

5/16"

0.500"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-18ZI-U

5/16"

0.562"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-20ZI-U

5/16"

0.625"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-22ZI-U

5/16"

0.687"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

SO-8194-24ZI-U

5/16"

0.750"

0.194"

0.050"

0.281"

0.280"

0.310"

N/A

Series SO-U / Metric Sizes

• Head Shape- Hex • Sheet Hardness- HRB 80 / HB 150 or Less • Material- Heat-Treated Carbon Steel • Finish- Zinc Clear Plated per ASTM B633
	Series SO-U Metric Sizes

Part
Number

"H"
Nom.

"L"
Body
Length

"B"
Thru-Hole
Diameter

Min.
Sheet
Thickness

Hole
Size in
Sheet

"C"
Barrel
O.D.

Min.
Distance
to Edge

Mil-Spec

SO-43.1-3ZI-U

4.80
mm

3.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-4ZI-U

4.80
mm

4.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-6ZI-U

4.80
mm

6.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-8ZI-U

4.80
mm

8.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-10ZI-U

4.80
mm

10.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-12ZI-U

4.80
mm

12.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-14ZI-U

4.80
mm

14.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-16ZI-U

4.80
mm

16.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-18ZI-U

4.80
mm

18.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-43.1-20ZI-U

4.80
mm

20.00
mm

3.10
mm

1.00
mm

4.22
mm

4.20
mm

6.00
mm

N/A

SO-63.1-3ZI-U

6.40
mm

3.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-4ZI-U

6.40
mm

4.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-6ZI-U

6.40
mm

6.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-8ZI-U

6.40
mm

8.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-10ZI-U

6.40
mm

10.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-12ZI-U

6.40
mm

12.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-14ZI-U

6.40
mm

14.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-16ZI-U

6.40
mm

16.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-18ZI-U

6.40
mm

18.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.1-20ZI-U

6.40
mm

20.00
mm

3.10
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-3ZI-U

6.40
mm

3.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-4ZI-U

6.40
mm

4.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-6ZI-U

6.40
mm

6.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-8ZI-U

6.40
mm

8.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-10ZI-U

6.40
mm

10.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-12ZI-U

6.40
mm

12.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-14ZI-U

6.40
mm

14.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-16ZI-U

6.40
mm

16.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-18ZI-U

6.40
mm

18.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-63.6-20ZI-U

6.40
mm

20.00
mm

3.60
mm

1.00
mm

5.41
mm

5.39
mm

6.80
mm

N/A

SO-83.6-3ZI-U

7.90
mm

3.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-4ZI-U

7.90
mm

4.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-6ZI-U

7.90
mm

6.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-8ZI-U

7.90
mm

8.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-10ZI-U

7.90
mm

10.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-12ZI-U

7.90
mm

12.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-14ZI-U

7.90
mm

14.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-16ZI-U

7.90
mm

16.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-18ZI-U

7.90
mm

18.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-83.6-20ZI-U

7.90
mm

20.00
mm

3.60
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-3ZI-U

7.90
mm

3.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-4ZI-U

7.90
mm

4.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-6ZI-U

7.90
mm

6.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-8ZI-U

7.90
mm

8.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-10ZI-U

7.90
mm

10.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-12ZI-U

7.90
mm

12.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-14ZI-U

7.90
mm

14.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-16ZI-U

7.90
mm

16.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-18ZI-U

7.90
mm

18.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-84.1-20ZI-U

7.90
mm

20.00
mm

4.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-3ZI-U

7.90
mm

3.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-4ZI-U

7.90
mm

4.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-6ZI-U

7.90
mm

6.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-8ZI-U

7.90
mm

8.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-10ZI-U

7.90
mm

10.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-12ZI-U

7.90
mm

12.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-14ZI-U

7.90
mm

14.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-16ZI-U

7.90
mm

16.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-18ZI-U

7.90
mm

18.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

SO-85.1-20ZI-U

7.90
mm

20.00
mm

5.10
mm

1.27
mm

7.14
mm

7.12
mm

8.00
mm

N/A

UNICORP Electronic Hardware - Self Clinching Fasteners

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UNICORP is a leader in manufacturing stock and custom
electronic hardware, handles and precision fasteners used by leading companies
in nearly every industry since 1971.

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