F Flush Nuts

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Flush Nuts F-U

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

UNICORP Electronic Hardware Self-Clinching Fasteners - Flush Nuts F, F4

• Self-clinching • Used as load-bearing threads in stainless steel panels as thin as 0.060"/ 1.53 mm
• Smooth on both surfaces • Hex head provides strength
• Installed quickly and easily by squeezing into hole

American Standard Sizes: • Series F-U

Metric Sizes: • Series F-U

Series F-U

Series F-U / American Standard Sizes

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

Part
Number

Thread

"A"
Shank
Max.

"H"
Head
Diameter

"C"
Body
Diameter

Min.
Sheet
Thickness

Hole Size
in Sheet

Min.
Distance
to Edge

Mil-Spec

F-256-1-U

2-56

0.060"

0.188"

0.171"

0.060" - 0.090"

0.172"

0.230"

M45938/4-1

F-256-2-U

2-56

0.090"

0.188"

0.171"

0.091"

0.172"

0.230"

M45938/4-2

F-440-1-U

4-40

0.060"

0.188"

0.171"

0.060" - 0.090"

0.172"

0.230"

M45938/4-3

F-440-2-U

4-40

0.090"

0.188"

0.171"

0.091"

0.172"

0.230"

M45938/4-4

F-632-1-U

6-32

0.060"

0.250"

0.212"

0.060" - 0.090"

0.213"

0.270"

M45938/4-5

F-632-2-U

6-32

0.090"

0.250"

0.212"

0.091"

0.213"

0.270"

M45938/4-6

F-832-1-U

8-32

0.060"

0.312"

0.289"

0.060" - 0.090"

0.290"

0.280"

M45938/4-7

F-832-2-U

8-32

0.090"

0.312"

0.289"

0.091"

0.290"

0.280"

M45938/4-8

F-032-1-U

10-32

0.060"

0.343"

0.311"

0.060" - 0.090"

0.312"

0.310"

M45938/4-9

F-032-2-U

10-32

0.090"

0.343"

0.311"

0.091"

0.312"

0.310"

M45938/4-10

F-0420-3-U

1/4-20

0.120"

0.375"

0.343"

0.125" - 0.155"

0.344"

0.340"

N/A

F-0420-4-U

1/4-20

0.151"

0.375"

0.343"

0.156" - 0.186"

0.344"

0.340"

N/A

F-0420-5-U

1/4-20

0.182"

0.375"

0.343"

0.187"

0.344"

0.340"

N/A

Series F-U / Metric Sizes

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

Part
Number

Thread

"A"
Shank
Max.

"H"
Head
Diameter

"C"
Body
Diameter

Min.
Sheet
Thickness

Hole Size
in Sheet

Min.
Distance
to Edge

Mil-Spec

F-M2-1-U

M2 x 0.4

1.53
mm

4.80
mm

4.35
mm

1.53 - 2.30
mm

4.37
mm

6.00
mm

N/A

F-M2-2-U

M2 x 0.4

2.30
mm

4.80
mm

4.35
mm

2.32
mm

4.37
mm

6.00
mm

N/A

F-M2.5-1-U

M2.5 x 0.45

1.53
mm

4.80
mm

4.35
mm

1.53 - 2.30
mm

4.37
mm

6.00
mm

N/A

F-M2.5-2-U

M2.5 x 0.45

2.30
mm

4.80
mm

4.35
mm

2.32
mm

4.37
mm

6.00
mm

N/A

F-M3-1-U

M3 x 0.5

1.53
mm

4.80
mm

4.35
mm

1.53 - 2.30
mm

4.37
mm

6.00
mm

N/A

F-M3-2-U

M3 x 0.5

2.30
mm

4.80
mm

4.35
mm

2.32
mm

4.37
mm

6.00
mm

N/A

F-M4-1-U

M4 x 0.7

1.53
mm

7.90
mm

7.35
mm

1.53 - 2.30
mm

7.37
mm

7.20
mm

N/A

F-M4-2-U

M4 x 0.7

2.30
mm

7.90
mm

7.35
mm

2.32
mm

7.37
mm

7.20
mm

N/A

F-M5-1-U

M5 x 0.8

1.53
mm

8.70
mm

7.90
mm

1.53 - 2.30
mm

7.92
mm

8.00
mm

N/A

F-M5-2-U

M5 x 0.8

2.30
mm

8.70
mm

7.90
mm

2.32
mm

7.92
mm

8.00
mm

N/A

F-M6-3-U

M6 x 1.0

3.05
mm

9.50
mm

8.72
mm

3.18 - 3.94
mm

8.74
mm

8.80
mm

N/A

F-M6-4-U

M6 x 1.0

3.84
mm

9.50
mm

8.72
mm

3.96 - 4.72
mm

8.74
mm

8.80
mm

N/A

F-M6-5-U

M6 x 1.0

4.63
mm

9.50
mm

8.72
mm

4.75
mm

8.74
mm

8.80
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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