B BS Blind Press Nuts

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Blind Press Nuts B-U, BS-U

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

UNICORP Electronic Hardware Self-Clinching Fasteners - Blind Press Nuts B, BS

• Self-clinching • Blind, sealed thread • Provide seal against foreign objects
• Protects components from screw • Used as extended thread lengths in sheet metal as thin as 0.040"/1.00 mm
• Installed quickly and easily with any press by squeezing

American Standard Sizes: • Series B-U • Series BS-U

Metric Sizes: • Series B-U • Series BS-U

Series B-U

Series B-U / American Standard Sizes

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

Part
Number

Thread

"A"
(Shank)
Max.

Min.
Sheet
Thickness

Hole
Size in
Sheet

"B"
Max.

"C"
Max.

"E"

"F"
Min.

"L"
Max.

"T"

Min.
Distance
to Edge

B-440-1ZI-U

4-40

0.038"

0.040"

0.166"

0.150"

0.165"

0.250"

0.210"

0.335"

0.380"

0.190"

B-632-1ZI-U

6-32

0.038"

0.040"

0.188"

0.169"

0.187"

0.280"

0.230"

0.335"

0.380"

0.220"

B-832-1ZI-U

8-32

0.038"

0.040"

0.213"

0.204"

0.212"

0.310"

0.280"

0.385"

0.440"

0.270"

B-032-1ZI-U

10-32

0.038"

0.040"

0.250"

0.235"

0.249"

0.340"

0.280"

0.385"

0.440"

0.280"

B-0420-1ZI-U

1/4-20

0.038"

0.056"

0.344"

0.305"

0.343"

0.430"

0.310"

0.500"

0.560"

0.340"

B-440-2ZI-U

4-40

0.054"

0.056"

0.166"

0.150"

0.165"

0.250"

0.210"

0.335"

0.380"

0.190"

B-632-2ZI-U

6-32

0.054"

0.056"

0.188"

0.169"

0.187"

0.280"

0.230"

0.335"

0.380"

0.220"

B-832-2ZI-U

8-32

0.054"

0.056"

0.213"

0.204"

0.212"

0.310"

0.280"

0.385"

0.440"

0.270"

B-032-2ZI-U

10-32

0.054"

0.056"

0.250"

0.235"

0.249"

0.340"

0.280"

0.385"

0.440"

0.280"

B-0420-2ZI-U

1/4-20

0.087"

0.090"

0.344"

0.305"

0.343"

0.430"

0.310"

0.500"

0.560"

0.340"

Series B-U / Metric Sizes

• Head Shape- Round • Sheet Hardness- HRB 80 / HB 150 or Less • Material- Heat-Treated Carbon Steel • Finish- Zinc Clear Plated per ASTM B633 • Mil-Spec- N/A
	Series B-U Metric Sizes

Part
Number

Thread

"A"
(Shank)
Max.

Min.
Sheet
Thickness

Hole
Size in
Sheet

"B"
Max.

"C"
Max.

"E"

"F"
Min.

"L"
Max.

"T"

Min.
Distance
to Edge

B-M3-1ZI-U

M3 x 0.5

0.97
mm

1.00
mm

4.22
mm

3.84
mm

4.20
mm

6.35
mm

5.30
mm

8.50
mm

9.60
mm

4.80
mm

B-M4-1ZI-U

M4 x 0.7

0.97
mm

1.00
mm

5.41
mm

5.20
mm

5.38
mm

7.95
mm

7.10
mm

9.80
mm

11.20
mm

6.90
mm

B-M5-1ZI-U

M5 x 0.8

0.97
mm

1.00
mm

6.35
mm

6.02
mm

6.33
mm

8.75
mm

7.10
mm

9.80
mm

11.20
mm

7.10
mm

B-M6-1ZI-U

M6 x 1.0

1.38
mm

1.40
mm

8.75
mm

7.80
mm

8.73
mm

11.10
mm

7.80
mm

12.70
mm

14.30
mm

8.60
mm

B-M3-2ZI-U

M3 x 0.5

1.38
mm

1.40
mm

4.22
mm

3.84
mm

4.20
mm

6.35
mm

5.30
mm

8.50
mm

9.60
mm

4.80
mm

B-M4-2ZI-U

M4 x 0.7

1.38
mm

1.40
mm

5.41
mm

5.20
mm

5.38
mm

7.95
mm

7.10
mm

9.80
mm

11.20
mm

6.90
mm

B-M5-2ZI-U

M5 x 0.8

1.38
mm

1.40
mm

6.35
mm

6.02
mm

6.33
mm

8.75
mm

7.10
mm

9.80
mm

11.20
mm

7.10
mm

B-M6-2ZI-U

M6 x 1.0

2.21
mm

2.29
mm

8.75
mm

7.80
mm

8.73
mm

11.10
mm

7.80
mm

12.70
mm

14.30
mm

8.60
mm

Series BS-U

Series BS-U / American Standard Sizes

• Head Shape- Round • Sheet Hardness- HRB 70 / HB 125 or Less • Material- 300 Series Stainless Steel • Finish- Passivated per ASTM A380 • Mil-Spec- N/A
	Series BS-U American Standard Sizes (SAE)

Part
Number

Thread

"A"
(Shank)
Max.

Min.
Sheet
Thickness

Hole
Size in
Sheet

"B"
Max.

"C"
Max.

"E"

"F"
Min.

"L"
Max.

"T"

Min.
Distance
to Edge

BS-440-1-U

4-40

0.038"

0.040"

0.166"

0.150"

0.165"

0.250"

0.210"

0.335"

0.380"

0.190"

BS-632-1-U

6-32

0.038"

0.040"

0.188"

0.169"

0.187"

0.280"

0.230"

0.335"

0.380"

0.220"

BS-832-1-U

8-32

0.038"

0.040"

0.213"

0.204"

0.212"

0.310"

0.280"

0.385"

0.440"

0.270"

BS-032-1-U

10-32

0.038"

0.040"

0.250"

0.235"

0.249"

0.340"

0.280"

0.385"

0.440"

0.280"

BS-0420-1-U

1/4-20

0.054"

0.056"

0.344"

0.305"

0.343"

0.430"

0.310"

0.500"

0.560"

0.340"

BS-440-2-U

4-40

0.054"

0.056"

0.166"

0.150"

0.165"

0.250"

0.210"

0.335"

0.380"

0.190"

BS-632-2-U

6-32

0.054"

0.056"

0.188"

0.169"

0.187"

0.280"

0.230"

0.335"

0.380"

0.220"

BS-832-2-U

8-32

0.054"

0.056"

0.213"

0.204"

0.212"

0.310"

0.280"

0.385"

0.440"

0.270"

BS-032-2-U

10-32

0.054"

0.056"

0.250"

0.235"

0.249"

0.340"

0.280"

0.385"

0.440"

0.280"

BS-0420-2-U

1/4-20

0.087"

0.090"

0.344"

0.305"

0.343"

0.430"

0.310"

0.500"

0.560"

0.340"

Series BS-U / Metric Sizes

• Head Shape- Round • Sheet Hardness- HRB 70 / HB 125 or Less • Material- 300 Series Stainless Steel • Finish- Passivated per ASTM A380 • Mil-Spec- N/A
	Series BS-U Metric Sizes

Part
Number

Thread

"A"
(Shank)
Max.

Min.
Sheet
Thickness

Hole
Size in
Sheet

"B"
Max.

"C"
Max.

"E"

"F"
Min.

"L"
Max.

"T"

Min.
Distance
to Edge

B-M3-1-U

M3 x 0.5

0.97
mm

1.00
mm

4.22
mm

3.84
mm

4.20
mm

6.35
mm

5.30
mm

8.50
mm

9.60
mm

4.80
mm

B-M4-1-U

M4 x 0.7

0.97
mm

1.00
mm

5.41
mm

5.20
mm

5.38
mm

7.95
mm

7.10
mm

9.80
mm

11.20
mm

6.90
mm

B-M5-1-U

M5 x 0.8

0.97
mm

1.00
mm

6.35
mm

6.02
mm

6.33
mm

8.75
mm

7.10
mm

9.80
mm

11.20
mm

7.10
mm

B-M6-1-U

M6 x 1.0

1.38
mm

1.40
mm

8.75
mm

7.80
mm

8.73
mm

11.10
mm

7.80
mm

12.70
mm

14.30
mm

8.60
mm

B-M3-2-U

M3 x 0.5

1.38
mm

1.40
mm

4.22
mm

3.84
mm

4.20
mm

6.35
mm

5.30
mm

8.50
mm

9.60
mm

4.80
mm

B-M4-2-U

M4 x 0.7

1.38
mm

1.40
mm

5.41
mm

5.20
mm

5.38
mm

7.95
mm

7.10
mm

9.80
mm

11.20
mm

6.90
mm

B-M5-2-U

M5 x 0.8

1.38
mm

1.40
mm

6.35
mm

6.02
mm

6.33
mm

8.75
mm

7.10
mm

9.80
mm

11.20
mm

7.10
mm

B-M6-2-U

M6 x 1.0

2.21
mm

2.29
mm

8.75
mm

7.80
mm

8.73
mm

11.10
mm

7.80
mm

12.70
mm

14.30
mm

8.60
mm

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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