Concealed Head Studs CHA

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Concealed Head Studs CHA-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 CHA-U

Metric Sizes: • Series CHA-U

Series CHA-U

Series CHA-U / American Standard Sizes

• Sheet Hardness- HRB 50 / HB 82 or Less • Material- Aluminum • Finish- None
	Series CHA-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

CHA-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

CHA-632-4-U

6-32

0.041"

0.250"

0.212"

0.062"

0.213"

0.043"

0.188"

0.160"

N/A

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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 CHA-U / Metric Sizes

• Sheet Hardness- HRB 50 / HB 82 or Less • Material- Aluminum • Finish- None
	Series CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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

CHA-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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