TSO Thin Sheet Threaded Standoffs

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Thin Sheet Threaded Standoffs TSO-U

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

UNICORP Electronic Hardware Self-Clinching Fasteners - Thin Sheet Threaded TSO, TSOS, TSOA

• Self-clinching • Permanently mounted • Installed quickly and easily in metal panels
• No secondary operation needed prior to installation • Outer sheet surface is flushed and closed
• Used for sheets as thin as 0.025" / 0.63 mm

American Standard Sizes: • Series TSO-U

Metric Sizes: • Series TSO-U

Series TSO-U

Series TSO-U / American Standard Sizes

• Head Shape- Hex • Sheet Hardness- HRB 60 / HB 107 or Less • Material- Non Heat-Treated Carbon Steel • Finish- Zinc Clear Plated per ASTM B633
	Series TSO-U American Standard Sizes (SAE)

Part
Number

Thread

"H"
Nom.

"L"
Body
Length

Style

Min.
Sheet
Thickness

Hole
Size in
Sheet

"C"
Barrel
O.D.

Min.
Distance
to Edge

Mil-Spec

TSO-256-090ZI-U

2-56

3/16"

0.090"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-125ZI-U

2-56

3/16"

0.125"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-187ZI-U

2-56

3/16"

0.187"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-250ZI-U

2-56

3/16"

0.250"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-312ZI-U

2-56

3/16"

0.312"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-375ZI-U

2-56

3/16"

0.375"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-437ZI-U

2-56

3/16"

0.437"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-500ZI-U

2-56

3/16"

0.500"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-562ZI-U

2-56

3/16"

0.562"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-625ZI-U

2-56

3/16"

0.625"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-687ZI-U

2-56

3/16"

0.687"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-256-750ZI-U

2-56

3/16"

0.750"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-6256-090ZI-U

2-56

1/4"

0.090"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-125ZI-U

2-56

1/4"

0.125"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-187ZI-U

2-56

1/4"

0.187"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-250ZI-U

2-56

1/4"

0.250"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-312ZI-U

2-56

1/4"

0.312"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-375ZI-U

2-56

1/4"

0.375"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-437ZI-U

2-56

1/4"

0.437"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-500ZI-U

2-56

1/4"

0.500"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-562ZI-U

2-56

1/4"

0.562"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-625ZI-U

2-56

1/4"

0.625"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-687ZI-U

2-56

1/4"

0.687"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6256-750ZI-U

2-56

1/4"

0.750"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-440-090ZI-U

4-40

3/16"

0.090"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-125ZI-U

4-40

3/16"

0.125"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-187ZI-U

4-40

3/16"

0.187"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-250ZI-U

4-40

3/16"

0.250"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-312ZI-U

4-40

3/16"

0.312"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-375ZI-U

4-40

3/16"

0.375"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-437ZI-U

4-40

3/16"

0.437"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-500ZI-U

4-40

3/16"

0.500"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-562ZI-U

4-40

3/16"

0.562"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-625ZI-U

4-40

3/16"

0.625"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-687ZI-U

4-40

3/16"

0.687"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-440-750ZI-U

4-40

3/16"

0.750"

0.025"

0.166"

0.165"

0.230"

N/A

TSO-6440-090ZI-U

4-40

1/4"

0.090"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-125ZI-U

4-40

1/4"

0.125"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-187ZI-U

4-40

1/4"

0.187"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-250ZI-U

4-40

1/4"

0.250"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-312ZI-U

4-40

1/4"

0.312"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-375ZI-U

4-40

1/4"

0.375"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-437ZI-U

4-40

1/4"

0.437"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-500ZI-U

4-40

1/4"

0.500"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-562ZI-U

4-40

1/4"

0.562"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-625ZI-U

4-40

1/4"

0.625"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-687ZI-U

4-40

1/4"

0.687"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-6440-750ZI-U

4-40

1/4"

0.750"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-125ZI-U

6-32

1/4"

0.125"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-187ZI-U

6-32

1/4"

0.187"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-250ZI-U

6-32

1/4"

0.250"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-312ZI-U

6-32

1/4"

0.312"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-375ZI-U

6-32

1/4"

0.375"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-437ZI-U

6-32

1/4"

0.437"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-500ZI-U

6-32

1/4"

0.500"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-562ZI-U

6-32

1/4"

0.562"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-625ZI-U

6-32

1/4"

0.625"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-687ZI-U

6-32

1/4"

0.687"

0.025"

0.213"

0.212"

0.270"

N/A

TSO-632-750ZI-U

6-32

1/4"

0.750"

0.025"

0.213"

0.212"

0.270"

N/A

Series TSO-U / Metric Sizes

• Head Shape- Hex • Sheet Hardness- HRB 60 / HB 107 or Less • Material- Non Heat-Treated Carbon Steel • Finish- Zinc Clear Plated per ASTM B633
	Series TSO-U Metric Sizes

Part
Number

Thread

"H"
Nom.

"L"
Body
Length

Style

Min.
Sheet
Thickness

Hole
Size in
Sheet

"C"
Barrel
O.D.

Min.
Distance
to Edge

Mil-Spec

TSO-M25-200ZI-U

M2.5 x 0.45

4.80
mm

2.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-300ZI-U

M2.5 x 0.45

4.80
mm

3.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-400ZI-U

M2.5 x 0.45

4.80
mm

4.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-600ZI-U

M2.5 x 0.45

4.80
mm

6.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-800ZI-U

M2.5 x 0.45

4.80
mm

8.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-1000ZI-U

M2.5 x 0.45

4.80
mm

10.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-1200ZI-U

M2.5 x 0.45

4.80
mm

12.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-1400ZI-U

M2.5 x 0.45

4.80
mm

14.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-1600ZI-U

M2.5 x 0.45

4.80
mm

16.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-1800ZI-U

M2.5 x 0.45

4.80
mm

18.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M25-1900ZI-U

M2.5 x 0.45

4.80
mm

19.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-6M25-200ZI-U

M2.5 x 0.45

6.40
mm

2.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-300ZI-U

M2.5 x 0.45

6.40
mm

3.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-400ZI-U

M2.5 x 0.45

6.40
mm

4.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-600ZI-U

M2.5 x 0.45

6.40
mm

6.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-800ZI-U

M2.5 x 0.45

6.40
mm

8.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-1000ZI-U

M2.5 x 0.45

6.40
mm

10.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-1200ZI-U

M2.5 x 0.45

6.40
mm

12.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-1400ZI-U

M2.5 x 0.45

6.40
mm

14.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-1600ZI-U

M2.5 x 0.45

6.40
mm

16.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-1800ZI-U

M2.5 x 0.45

6.40
mm

18.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M25-1900ZI-U

M2.5 x 0.45

6.40
mm

19.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M3-200ZI-U

M3 x 0.5

4.80
mm

2.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-300ZI-U

M3 x 0.5

4.80
mm

3.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-400ZI-U

M3 x 0.5

4.80
mm

4.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-600ZI-U

M3 x 0.5

4.80
mm

6.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-800ZI-U

M3 x 0.5

4.80
mm

8.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-1000ZI-U

M3 x 0.5

4.80
mm

10.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-1200ZI-U

M3 x 0.5

4.80
mm

12.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-1400ZI-U

M3 x 0.5

4.80
mm

14.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-1600ZI-U

M3 x 0.5

4.80
mm

16.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-1800ZI-U

M3 x 0.5

4.80
mm

18.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-M3-1900ZI-U

M3 x 0.5

4.80
mm

19.00
mm

0.63
mm

4.22
mm

4.20
mm

5.80
mm

N/A

TSO-6M3-200ZI-U

M3 x 0.5

6.40
mm

2.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-300ZI-U

M3 x 0.5

6.40
mm

3.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-400ZI-U

M3 x 0.5

6.40
mm

4.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-600ZI-U

M3 x 0.5

6.40
mm

6.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-800ZI-U

M3 x 0.5

6.40
mm

8.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-1000ZI-U

M3 x 0.5

6.40
mm

10.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-1200ZI-U

M3 x 0.5

6.40
mm

12.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-1400ZI-U

M3 x 0.5

6.40
mm

14.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-1600ZI-U

M3 x 0.5

6.40
mm

16.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-1800ZI-U

M3 x 0.5

6.40
mm

18.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-6M3-1900ZI-U

M3 x 0.5

6.40
mm

19.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-300ZI-U

M3.5 x 0.6

6.40
mm

3.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-400ZI-U

M3.5 x 0.6

6.40
mm

4.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-600ZI-U

M3.5 x 0.6

6.40
mm

6.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-800ZI-U

M3.5 x 0.6

6.40
mm

8.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-1000ZI-U

M3.5 x 0.6

6.40
mm

10.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-1200ZI-U

M3.5 x 0.6

6.40
mm

12.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-1400ZI-U

M3.5 x 0.6

6.40
mm

14.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-1600ZI-U

M3.5 x 0.6

6.40
mm

16.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-1800ZI-U

M3.5 x 0.6

6.40
mm

18.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

TSO-M35-1900ZI-U

M3.5 x 0.6

6.40
mm

19.00
mm

0.63
mm

5.41
mm

5.39
mm

7.10
mm

N/A

UNICORP Electronic Hardware - Self Clinching Fasteners

Phone: 973-674-1700 Toll Free: 1-800-526-1389 Fax: 973-674-3803

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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Mailing Address:  P.O. Box 280, Orange, New Jersey 07051-0280  USA

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