CHC Concealed Head Studs

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Concealed Head Studs CHC-U

Self Clinching Fasteners • Studs for Sheet Metal
American Standard (Inches) & Metric Sizes

UNICORP Electronic Hardware Self-Clinching Fasteners - Concealed - Head Studs CHA, CFHA, CHC, CFHC

• Permanent mounting • Used in metal sheets as thin as 0.062"/ 1.60 mm • One side remains smooth
• Installed with hollow punch and solid anvil • Head pressed into blind, milled hole

American Standard Sizes: • Series CHC-U

Metric Sizes: • Series CHC-U

Series CHC-U

Series CHC-U / American Standard Sizes

• Sheet Hardness- HRB 70 / HB 125 or Less • Material- 300 Series Stainless Steel • Finish- Passivated per ASTM A380
	Series CHC-U American Standard Sizes (SAE)

Part
Number

Thread

"A"
Max.

"L"
Length

"E"

"C"
Max.

Min.
Sheet
Thickness

Blind
Mounting
Hole
Diameter

Min.
Depth
of Blind
Hole

Min.
Distance
to Edge

Max.
Hole in
Attached
Parts

Mil-Spec

CHC-440-4-U

4-40

0.041"

0.250"

0.205"

0.171"

0.062"

0.172"

0.043"

0.156"

0.135"

N/A

CHC-632-4-U

6-32

0.041"

0.250"

0.212"

0.062"

0.213"

0.043"

0.188"

0.160"

N/A

CHC-832-4-U

8-32

0.041"

0.250"

0.328"

0.289"

0.062"

0.290"

0.043"

0.219"

0.185"

N/A

CHC-440-6-U

4-40

0.041"

0.375"

0.205"

0.171"

0.062"

0.172"

0.043"

0.156"

0.135"

N/A

CHC-632-6-U

6-32

0.041"

0.375"

0.250"

0.212"

0.062"

0.213"

0.043"

0.188"

0.160"

N/A

CHC-832-6-U

8-32

0.041"

0.375"

0.328"

0.289"

0.062"

0.290"

0.043"

0.219"

0.185"

N/A

CHC-032-6-U

10-32

0.041"

0.375"

0.350"

0.311"

0.062"

0.312"

0.043"

0.250"

0.210"

N/A

CHC-440-8-U

4-40

0.041"

0.500"

0.205"

0.171"

0.062"

0.172"

0.043"

0.156"

0.135"

N/A

CHC-632-8-U

6-32

0.041"

0.500"

0.250"

0.212"

0.062"

0.213"

0.043"

0.188"

0.160"

N/A

CHC-832-8-U

8-32

0.041"

0.500"

0.328"

0.289"

0.062"

0.290"

0.043"

0.219"

0.185"

N/A

CHC-032-8-U

10-32

0.041"

0.500"

0.350"

0.311"

0.062"

0.312"

0.043"

0.250"

0.210"

N/A

CHC-440-10-U

4-40

0.041"

0.625"

0.205"

0.171"

0.062"

0.172"

0.043"

0.156"

0.135"

N/A

CHC-632-10-U

6-32

0.041"

0.625"

0.250"

0.212"

0.062"

0.213"

0.043"

0.188"

0.160"

N/A

CHC-832-10-U

8-32

0.041"

0.625"

0.328"

0.289"

0.062"

0.290"

0.043"

0.219"

0.185"

N/A

CHC-032-10-U

10-32

0.041"

0.625"

0.350"

0.311"

0.062"

0.312"

0.043"

0.250"

0.210"

N/A

CHC-440-12-U

4-40

0.041"

0.750"

0.205"

0.171"

0.062"

0.172"

0.043"

0.156"

0.135"

N/A

CHC-632-12-U

6-32

0.041"

0.750"

0.250"

0.212"

0.062"

0.213"

0.043"

0.188"

0.160"

N/A

CHC-832-12-U

8-32

0.041"

0.750"

0.328"

0.289"

0.062"

0.290"

0.043"

0.219"

0.185"

N/A

CHC-032-12-U

10-32

0.041"

0.750"

0.350"

0.311"

0.062"

0.312"

0.043"

0.250"

0.210"

N/A

CHC-632-16-U

6-32

0.041"

1.000"

0.250"

0.212"

0.062"

0.213"

0.043"

0.188"

0.160"

N/A

CHC-832-16-U

6-32

0.041"

1.000"

0.328"

0.289"

0.062"

0.290"

0.043"

0.219"

0.185"

N/A

CHC-032-16-U

10-32

0.041"

1.000"

0.350"

0.311"

0.062"

0.312"

0.043"

0.250"

0.210"

N/A

Series CHC-U / Metric Sizes

• Sheet Hardness- HRB 70 / HB 125 or Less • Material- 300 Series Stainless Steel • Finish- Passivated per ASTM A380
	Series CHC-U Metric Sizes

Part
Number

Thread

"A"
Max.

"L"
Length

"E"

"C"
Max.

Min.
Sheet
Thickness

Blind
Mounting
Hole
Diameter

Min.
Depth
of Blind
Hole

Min.
Distance
to Edge

Max.
Hole in
Attached
Parts

Mil-Spec

CHC-M3-6-U

M3 x 0.5

1.04
mm

6.00
mm

5.21
mm

4.35
mm

1.60
mm

4.37
mm

1.10
mm

4.00
mm

3.60
mm

N/A

CHC-M4-6-U

M4 x 0.7

1.04
mm

6.00
mm

8.33
mm

7.35
mm

1.60
mm

7.37
mm

1.10
mm

5.60
mm

4.60
mm

N/A

CHC-M3-8-U

M3 x 0.5

1.04
mm

8.00
mm

5.21
mm

4.35
mm

1.60
mm

4.37
mm

1.10
mm

4.00
mm

3.60
mm

N/A

CHC-M4-8-U

M4 x 0.7

1.04
mm

8.00
mm

8.33
mm

7.35
mm

1.60
mm

7.37
mm

1.10
mm

5.60
mm

4.60
mm

N/A

CHC-M3-10-U

M3 x 0.5

1.04
mm

10.00
mm

5.21
mm

4.35
mm

1.60
mm

4.37
mm

1.10
mm

4.00
mm

3.60
mm

N/A

CHC-M4-10-U

M4 x 0.7

1.04
mm

10.00
mm

8.33
mm

7.35
mm

1.60
mm

7.37
mm

1.10
mm

5.60
mm

4.60
mm

N/A

CHC-M5-10-U

M5 x 0.8

1.04
mm

10.00
mm

8.89
mm

7.90
mm

1.60
mm

7.93
mm

1.10
mm

6.40
mm

5.60
mm

N/A

CHC-M3-12-U

M3 x 0.5

1.04
mm

12.00
mm

5.21
mm

4.35
mm

1.60
mm

4.37
mm

1.10
mm

4.00
mm

3.60
mm

N/A

CHC-M4-12-U

M4 x 0.7

1.04
mm

12.00
mm

8.33
mm

7.35
mm

1.60
mm

7.37
mm

1.10
mm

5.60
mm

4.60
mm

N/A

CHC-M5-12-U

M5 x 0.8

1.04
mm

12.00
mm

8.89
mm

7.90
mm

1.60
mm

7.93
mm

1.10
mm

6.40
mm

5.60
mm

N/A

CHC-M3-16-U

M3 x 0.5

1.04
mm

16.00
mm

5.21
mm

4.35
mm

1.60
mm

4.37
mm

1.10
mm

4.00
mm

3.60
mm

N/A

CHC-M4-16-U

M4 x 0.7

1.04
mm

16.00
mm

8.33
mm

7.35
mm

1.60
mm

7.37
mm

1.10
mm

5.60
mm

4.60
mm

N/A

CHC-M5-16-U

M5 x 0.8

1.04
mm

16.00
mm

8.89
mm

7.90
mm

1.60
mm

7.93
mm

1.10
mm

6.40
mm

5.60
mm

N/A

CHC-M3-20-U

M3 x 0.5

1.04
mm

20.00
mm

5.21
mm

4.35
mm

1.60
mm

4.37
mm

1.10
mm

4.00
mm

3.60
mm

N/A

CHC-M4-20-U

M4 x 0.7

1.04
mm

20.00
mm

8.33
mm

7.35
mm

1.60
mm

7.37
mm

1.10
mm

5.60
mm

4.60
mm

N/A

CHC-M5-20-U

M5 x 0.8

1.04
mm

20.00
mm

8.89
mm

7.90
mm

1.60
mm

7.93
mm

1.10
mm

6.40
mm

5.60
mm

N/A

CHC-M4-25-U

M4 x 0.7

1.04
mm

25.00
mm

8.33
mm

7.35
mm

1.60
mm

7.37
mm

1.10
mm

5.60
mm

4.60
mm

N/A

CHC-M5-25-U

M5 x 0.8

1.04
mm

25.00
mm

8.89
mm

7.90
mm

1.60
mm

7.93
mm

1.10
mm

6.40
mm

5.60
mm

N/A

UNICORP Electronic Hardware - Self Clinching Fasteners

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