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Threaded Flush-Head Studs  FH-U

Self Clinching Fasteners  •  Studs for Sheet Metal
American Standard (Inches) & Metric Sizes
• Self-clinching     • Installed quickly and easily by squeezing into place     • Creates flush-head assembly
• Stud locked into place     • Minimum sheet thickness of 0.040" /1.00 mm
American Standard Sizes:   • Series FH-U  (Zinc Clear)        • Series FH-U  (Zinc Yellow)   
Metric Sizes:   • Series FH-U  (Zinc Clear)         • Series FH-U  (Zinc Yellow)
Series  FH-U
Series  FH-U  (Zinc Clear)  /  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
Series FH-U
American Standard Sizes
(SAE)
Part
Number
Thread "S"
Max.
"H"
Head
Diameter
"L"
Overall
Length
Min.
Sheet
Thickness
Hole
Size in
Sheet
Max.
Hole in
Attached
Parts
Min.
Distance
to Edge
Mil-Spec
FH-256-4ZI-U 2-56 0.075" 0.144" 0.250" 0.040" 0.085" 0.105" 0.187" N/A
FH-256-5ZI-U 2-56 0.075" 0.144" 0.312" 0.040" 0.085" 0.105" 0.187" N/A
FH-256-6ZI-U 2-56 0.075" 0.144" 0.375" 0.040" 0.085" 0.105" 0.187" N/A
FH-256-8ZI-U 2-56 0.075" 0.144" 0.500" 0.040" 0.085" 0.105" 0.187" N/A
FH-256-10ZI-U 2-56 0.075" 0.144" 0.625" 0.040" 0.085" 0.105" 0.187" N/A
FH-256-12ZI-U 2-56 0.075" 0.144" 0.750" 0.040" 0.085" 0.105" 0.187" N/A
FH-440-4ZI-U 4-40 0.085" 0.176" 0.250" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-5ZI-U 4-40 0.085" 0.176" 0.312" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-6ZI-U 4-40 0.085" 0.176" 0.375" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-8ZI-U 4-40 0.085" 0.176" 0.500" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-10ZI-U 4-40 0.085" 0.176" 0.625" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-12ZI-U 4-40 0.085" 0.176" 0.750" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-14ZI-U 4-40 0.085" 0.176" 0.875" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-16ZI-U 4-40 0.085" 0.176" 1.000" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-20ZI-U 4-40 0.085" 0.176" 1.250" 0.040" 0.111" 0.135" 0.219" N/A
FH-632-4ZI-U 6-32 0.090" 0.206" 0.250" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-5ZI-U 6-32 0.090" 0.206" 0.312" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-6ZI-U 6-32 0.090" 0.206" 0.375" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-8ZI-U 6-32 0.090" 0.206" 0.500" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-10ZI-U 6-32 0.090" 0.206" 0.625" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-12ZI-U 6-32 0.090" 0.206" 0.750" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-14ZI-U 6-32 0.090" 0.206" 0.875" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-16ZI-U 6-32 0.090" 0.206" 1.000" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-20ZI-U 6-32 0.090" 0.206" 1.250" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-24ZI-U 6-32 0.090" 0.206" 1.500" 0.040" 0.137" 0.160" 0.250" N/A
FH-832-4ZI-U 8-32 0.090" 0.237" 0.250" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-5ZI-U 8-32 0.090" 0.237" 0.312" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-6ZI-U 8-32 0.090" 0.237" 0.375" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-8ZI-U 8-32 0.090" 0.237" 0.500" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-10ZI-U 8-32 0.090" 0.237" 0.625" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-12ZI-U 8-32 0.090" 0.237" 0.750" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-14ZI-U 8-32 0.090" 0.237" 0.875" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-16ZI-U 8-32 0.090" 0.237" 1.000" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-20ZI-U 8-32 0.090" 0.237" 1.250" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-24ZI-U 8-32 0.090" 0.237" 1.500" 0.040" 0.163" 0.185" 0.281" N/A
FH-024-5ZI-U 10-24 0.100" 0.256" 0.312" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-6ZI-U 10-24 0.100" 0.256" 0.375" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-8ZI-U 10-24 0.100" 0.256" 0.500" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-10ZI-U 10-24 0.100" 0.256" 0.625" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-12ZI-U 10-24 0.100" 0.256" 0.750" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-14ZI-U 10-24 0.100" 0.256" 0.875" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-16ZI-U 10-24 0.100" 0.256" 1.000" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-20ZI-U 10-24 0.100" 0.256" 1.250" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-24ZI-U 10-24 0.100" 0.256" 1.500" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-5ZI-U 10-32 0.100" 0.256" 0.312" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-6ZI-U 10-32 0.100" 0.256" 0.375" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-8ZI-U 10-32 0.100" 0.256" 0.500" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-10ZI-U 10-32 0.100" 0.256" 0.625" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-12ZI-U 10-32 0.100" 0.256" 0.750" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-14ZI-U 10-32 0.100" 0.256" 0.875" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-16ZI-U 10-32 0.100" 0.256" 1.000" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-20ZI-U 10-32 0.100" 0.256" 1.250" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-24ZI-U 10-32 0.100" 0.256" 1.500" 0.040" 0.189" 0.210" 0.281" N/A
FH-0420-6ZI-U 1/4-20 0.135" 0.337" 0.375" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-8ZI-U 1/4-20 0.135" 0.337" 0.500" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-10ZI-U 1/4-20 0.135" 0.337" 0.625" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-12ZI-U 1/4-20 0.135" 0.337" 0.750" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-14ZI-U 1/4-20 0.135" 0.337" 0.875" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-16ZI-U 1/4-20 0.135" 0.337" 1.000" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-18ZI-U 1/4-20 0.135" 0.337" 1.125" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-20ZI-U 1/4-20 0.135" 0.337" 1.250" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-24ZI-U 1/4-20 0.135" 0.337" 1.500" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-28ZI-U 1/4-20 0.135" 0.337" 1.750" 0.062" 0.249" 0.270" 0.312" N/A
FH-0518-8ZI-U 5/16-18 0.160" 0.376" 0.500" 0.093" 0.311" 0.333" 0.375" N/A
FH-0518-10ZI-U 5/16-18 0.160" 0.376" 0.625" 0.093" 0.311" 0.333" 0.375" N/A
FH-0518-12ZI-U 5/16-18 0.160" 0.376" 0.750" 0.093" 0.311" 0.333" 0.375" N/A
FH-0518-14ZI-U 5/16-18 0.160" 0.376" 0.875" 0.093" 0.311" 0.333" 0.375" N/A
FH-0518-16ZI-U 5/16-18 0.160" 0.376" 1.000" 0.093" 0.311" 0.333" 0.375" N/A
FH-0518-20ZI-U 5/16-18 0.160" 0.376" 1.250" 0.093" 0.311" 0.333" 0.375" N/A
FH-0518-24ZI-U 5/16-18 0.160" 0.376" 1.500" 0.093" 0.311" 0.333" 0.375" N/A
Series  FH-U  (Zinc Clear)  /  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
Series FH-U
Metric Sizes
Part
Number
Thread "S"
Max.
"H"
Head
Diameter
"L"
Overall
Length
Min.
Sheet
Thickness
Hole
Size in
Sheet
Max.
Hole in
Attached
Parts
Min.
Distance
to Edge
Mil-Spec
FH-M2.5-6ZI-U M2.5 x 0.45 1.95
mm
4.10
mm
6.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-8ZI-U M2.5 x 0.45 1.95
mm
4.10
mm
8.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-10ZI-U M2.5 x 0.45 1.95
mm
4.10
mm
10.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-12ZI-U M2.5 x 0.45 1.95
mm
4.10
mm
12.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-15ZI-U M2.5 x 0.45 1.95
mm
4.10
mm
15.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-18ZI-U M2.5 x 0.45 1.95
mm
4.10
mm
18.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M3-6ZI-U M3 x 0.5 2.10
mm
4.60
mm
6.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-8ZI-U M3 x 0.5 2.10
mm
4.60
mm
8.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-10ZI-U M3 x 0.5 2.10
mm
4.60
mm
10.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-12ZI-U M3 x 0.5 2.10
mm
4.60
mm
12.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-15ZI-U M3 x 0.5 2.10
mm
4.60
mm
15.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-18ZI-U M3 x 0.5 2.10
mm
4.60
mm
18.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-20ZI-U M3 x 0.5 2.10
mm
4.60
mm
20.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-25ZI-U M3 x 0.5 2.10
mm
4.60
mm
25.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3.5-6ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
6.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-8ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
8.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-10ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
10.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-12ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
12.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-15ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
15.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-18ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
18.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-20ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
20.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-25ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
25.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-30ZI-U M3.5 x 0.6 2.25
mm
5.30
mm
30.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M4-6ZI-U M4 x 0.7 2.40
mm
5.90
mm
6.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-8ZI-U M4 x 0.7 2.40
mm
5.90
mm
8.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-10ZI-U M4 x 0.7 2.40
mm
5.90
mm
10.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-12ZI-U M4 x 0.7 2.40
mm
5.90
mm
12.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-15ZI-U M4 x 0.7 2.40
mm
5.90
mm
15.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-18ZI-U M4 x 0.7 2.40
mm
5.90
mm
18.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-20ZI-U M4 x 0.7 2.40
mm
5.90
mm
20.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-25ZI-U M4 x 0.7 2.40
mm
5.90
mm
25.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-30ZI-U M4 x 0.7 2.40
mm
5.90
mm
30.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-35ZI-U M4 x 0.7 2.40
mm
5.90
mm
35.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M5-8ZI-U M5 x 0.8 2.70
mm
6.50
mm
8.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-10ZI-U M5 x 0.8 2.70
mm
6.50
mm
10.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-12ZI-U M5 x 0.8 2.70
mm
6.50
mm
12.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-15ZI-U M5 x 0.8 2.70
mm
6.50
mm
15.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-18ZI-U M5 x 0.8 2.70
mm
6.50
mm
18.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-20ZI-U M5 x 0.8 2.70
mm
6.50
mm
20.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-25ZI-U M5 x 0.8 2.70
mm
6.50
mm
25.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-30ZI-U M5 x 0.8 2.70
mm
6.50
mm
30.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-35ZI-U M5 x 0.8 2.70
mm
6.50
mm
35.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M6-10ZI-U M6 x 1.0 3.00
mm
8.20
mm
10.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-12ZI-U M6 x 1.0 3.00
mm
8.20
mm
12.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-15ZI-U M6 x 1.0 3.00
mm
8.20
mm
15.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-18ZI-U M6 x 1.0 3.00
mm
8.20
mm
18.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-20ZI-U M6 x 1.0 3.00
mm
8.20
mm
20.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-25ZI-U M6 x 1.0 3.00
mm
8.20
mm
25.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-30ZI-U M6 x 1.0 3.00
mm
8.20
mm
30.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-35ZI-U M6 x 1.0 3.00
mm
8.20
mm
35.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M8-12ZI-U M8 x 1.25 3.70
mm
9.60
mm
12.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-15ZI-U M8 x 1.25 3.70
mm
9.60
mm
15.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-18ZI-U M8 x 1.25 3.70
mm
9.60
mm
18.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-20ZI-U M8 x 1.25 3.70
mm
9.60
mm
20.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-25ZI-U M8 x 1.25 3.70
mm
9.60
mm
25.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-30ZI-U M8 x 1.25 3.70
mm
9.60
mm
30.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-35ZI-U M8 x 1.25 3.70
mm
9.60
mm
35.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
Series  FH-U
Series  FH-U  (Zinc Yellow)   /  American Standard Sizes
      • Head Shape-  Round
      • Sheet Hardness-  HRB 80 / HB 150 or Less
      • Material-  Heat-Treated Carbon Steel
      • Finish-  Zinc Yellow Plated per ASTM B633
Series FH-U
American Standard Sizes
(SAE)
Part
Number
Thread "S"
Max.
"H"
Head
Diameter
"L"
Overall
Length
Min.
Sheet
Thickness
Hole
Size in
Sheet
Max.
Hole in
Attached
Parts
Min.
Distance
to Edge
Mil-Spec
FH-256-4ZC-U 2-56 0.075" 0.144" 0.250" 0.040" 0.085" 0.105" 0.187" M63540/1-1
FH-256-5ZC-U 2-56 0.075" 0.144" 0.312" 0.040" 0.085" 0.105" 0.187" M63540/1-2
FH-256-6ZC-U 2-56 0.075" 0.144" 0.375" 0.040" 0.085" 0.105" 0.187" M63540/1-3
FH-256-8ZC-U 2-56 0.075" 0.144" 0.500" 0.040" 0.085" 0.105" 0.187" M63540/1-4
FH-256-10ZC-U 2-56 0.075" 0.144" 0.625" 0.040" 0.085" 0.105" 0.187" M63540/1-5
FH-256-12ZC-U 2-56 0.075" 0.144" 0.750" 0.040" 0.085" 0.105" 0.187" N/A
FH-440-4ZC-U 4-40 0.085" 0.176" 0.250" 0.040" 0.111" 0.135" 0.219" M63540/1-6
FH-440-5ZC-U 4-40 0.085" 0.176" 0.312" 0.040" 0.111" 0.135" 0.219" M63540/1-7
FH-440-6ZC-U 4-40 0.085" 0.176" 0.375" 0.040" 0.111" 0.135" 0.219" M63540/1-8
FH-440-8ZC-U 4-40 0.085" 0.176" 0.500" 0.040" 0.111" 0.135" 0.219" M63540/1-9
FH-440-10ZC-U 4-40 0.085" 0.176" 0.625" 0.040" 0.111" 0.135" 0.219" M63540/1-10
FH-440-12ZC-U 4-40 0.085" 0.176" 0.750" 0.040" 0.111" 0.135" 0.219" M63540/1-11
FH-440-14ZC-U 4-40 0.085" 0.176" 0.875" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-16ZC-U 4-40 0.085" 0.176" 1.000" 0.040" 0.111" 0.135" 0.219" N/A
FH-440-20ZC-U 4-40 0.085" 0.176" 1.250" 0.040" 0.111" 0.135" 0.219" N/A
FH-632-4ZC-U 6-32 0.090" 0.206" 0.250" 0.040" 0.137" 0.160" 0.250" N/A
FH-632-5ZC-U 6-32 0.090" 0.206" 0.312" 0.040" 0.137" 0.160" 0.250" M63540/1-12
FH-632-6ZC-U 6-32 0.090" 0.206" 0.375" 0.040" 0.137" 0.160" 0.250" M63540/1-13
FH-632-8ZC-U 6-32 0.090" 0.206" 0.500" 0.040" 0.137" 0.160" 0.250" M63540/1-14
FH-632-10ZC-U 6-32 0.090" 0.206" 0.625" 0.040" 0.137" 0.160" 0.250" M63540/1-15
FH-632-12ZC-U 6-32 0.090" 0.206" 0.750" 0.040" 0.137" 0.160" 0.250" M63540/1-16
FH-632-14ZC-U 6-32 0.090" 0.206" 0.875" 0.040" 0.137" 0.160" 0.250" M63540/1-17
FH-632-16ZC-U 6-32 0.090" 0.206" 1.000" 0.040" 0.137" 0.160" 0.250" M63540/1-18
FH-632-20ZC-U 6-32 0.090" 0.206" 1.250" 0.040" 0.137" 0.160" 0.250" M63540/1-19
FH-632-24ZC-U 6-32 0.090" 0.206" 1.500" 0.040" 0.137" 0.160" 0.250" N/A
FH-832-4ZC-U 8-32 0.090" 0.237" 0.250" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-5ZC-U 8-32 0.090" 0.237" 0.312" 0.040" 0.163" 0.185" 0.281" N/A
FH-832-6ZC-U 8-32 0.090" 0.237" 0.375" 0.040" 0.163" 0.185" 0.281" M63540/1-20
FH-832-8ZC-U 8-32 0.090" 0.237" 0.500" 0.040" 0.163" 0.185" 0.281" M63540/1-21
FH-832-10ZC-U 8-32 0.090" 0.237" 0.625" 0.040" 0.163" 0.185" 0.281" M63540/1-22
FH-832-12ZC-U 8-32 0.090" 0.237" 0.750" 0.040" 0.163" 0.185" 0.281" M63540/1-23
FH-832-14ZC-U 8-32 0.090" 0.237" 0.875" 0.040" 0.163" 0.185" 0.281" M63540/1-24
FH-832-16ZC-U 8-32 0.090" 0.237" 1.000" 0.040" 0.163" 0.185" 0.281" M63540/1-25
FH-832-20ZC-U 8-32 0.090" 0.237" 1.250" 0.040" 0.163" 0.185" 0.281" M63540/1-26
FH-832-24ZC-U 8-32 0.090" 0.237" 1.500" 0.040" 0.163" 0.185" 0.281" M63540/1-27
FH-024-5ZC-U 10-24 0.100" 0.256" 0.312" 0.040" 0.189" 0.210" 0.281" N/A
FH-024-6ZC-U 10-24 0.100" 0.256" 0.375" 0.040" 0.189" 0.210" 0.281" M63540/1-28
FH-024-8ZC-U 10-24 0.100" 0.256" 0.500" 0.040" 0.189" 0.210" 0.281" M63540/1-29
FH-024-10ZC-U 10-24 0.100" 0.256" 0.625" 0.040" 0.189" 0.210" 0.281" M63540/1-30
FH-024-12ZC-U 10-24 0.100" 0.256" 0.750" 0.040" 0.189" 0.210" 0.281" M63540/1-31
FH-024-14ZC-U 10-24 0.100" 0.256" 0.875" 0.040" 0.189" 0.210" 0.281" M63540/1-32
FH-024-16ZC-U 10-24 0.100" 0.256" 1.000" 0.040" 0.189" 0.210" 0.281" M63540/1-33
FH-024-20ZC-U 10-24 0.100" 0.256" 1.250" 0.040" 0.189" 0.210" 0.281" M63540/1-34
FH-024-24ZC-U 10-24 0.100" 0.256" 1.500" 0.040" 0.189" 0.210" 0.281" M63540/1-35
FH-032-5ZC-U 10-32 0.100" 0.256" 0.312" 0.040" 0.189" 0.210" 0.281" N/A
FH-032-6ZC-U 10-32 0.100" 0.256" 0.375" 0.040" 0.189" 0.210" 0.281" M63540/1-36
FH-032-8ZC-U 10-32 0.100" 0.256" 0.500" 0.040" 0.189" 0.210" 0.281" M63540/1-37
FH-032-10ZC-U 10-32 0.100" 0.256" 0.625" 0.040" 0.189" 0.210" 0.281" M63540/1-38
FH-032-12ZC-U 10-32 0.100" 0.256" 0.750" 0.040" 0.189" 0.210" 0.281" M63540/1-39
FH-032-14ZC-U 10-32 0.100" 0.256" 0.875" 0.040" 0.189" 0.210" 0.281" M63540/1-40
FH-032-16ZC-U 10-32 0.100" 0.256" 1.000" 0.040" 0.189" 0.210" 0.281" M63540/1-41
FH-032-20ZC-U 10-32 0.100" 0.256" 1.250" 0.040" 0.189" 0.210" 0.281" M63540/1-42
FH-032-24ZC-U 10-32 0.100" 0.256" 1.500" 0.040" 0.189" 0.210" 0.281" M63540/1-43
FH-0420-6ZC-U 1/4-20 0.135" 0.337" 0.375" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-8ZC-U 1/4-20 0.135" 0.337" 0.500" 0.062" 0.249" 0.270" 0.312" M63540/1-44
FH-0420-10ZC-U 1/4-20 0.135" 0.337" 0.625" 0.062" 0.249" 0.270" 0.312" M63540/1-45
FH-0420-12ZC-U 1/4-20 0.135" 0.337" 0.750" 0.062" 0.249" 0.270" 0.312" M63540/1-46
FH-0420-14ZC-U 1/4-20 0.135" 0.337" 0.875" 0.062" 0.249" 0.270" 0.312" M63540/1-47
FH-0420-16ZC-U 1/4-20 0.135" 0.337" 1.000" 0.062" 0.249" 0.270" 0.312" M63540/1-48
FH-0420-18ZC-U 1/4-20 0.135" 0.337" 1.125" 0.062" 0.249" 0.270" 0.312" N/A
FH-0420-20ZC-U 1/4-20 0.135" 0.337" 1.250" 0.062" 0.249" 0.270" 0.312" M63540/1-49
FH-0420-24ZC-U 1/4-20 0.135" 0.337" 1.500" 0.062" 0.249" 0.270" 0.312" M63540/1-50
FH-0420-28ZC-U 1/4-20 0.135" 0.337" 1.750" 0.062" 0.249" 0.270" 0.312" N/A
FH-0518-8ZC-U 5/16-18 0.160" 0.376" 0.500" 0.093" 0.311" 0.333" 0.375" N/A
FH-0518-10ZC-U 5/16-18 0.160" 0.376" 0.625" 0.093" 0.311" 0.333" 0.375" M63540/1-51
FH-0518-12ZC-U 5/16-18 0.160" 0.376" 0.750" 0.093" 0.311" 0.333" 0.375" M63540/1-52
FH-0518-14ZC-U 5/16-18 0.160" 0.376" 0.875" 0.093" 0.311" 0.333" 0.375" M63540/1-53
FH-0518-16ZC-U 5/16-18 0.160" 0.376" 1.000" 0.093" 0.311" 0.333" 0.375" M63540/1-54
FH-0518-20ZC-U 5/16-18 0.160" 0.376" 1.250" 0.093" 0.311" 0.333" 0.375" M63540/1-55
FH-0518-24ZC-U 5/16-18 0.160" 0.376" 1.500" 0.093" 0.311" 0.333" 0.375" M63540/1-56
Series  FH-U  (Zinc Yellow)  /  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
Series FH-U
Metric Sizes
Part
Number
Thread "S"
Max.
"H"
Head
Diameter
"L"
Overall
Length
Min.
Sheet
Thickness
Hole
Size in
Sheet
Max.
Hole in
Attached
Parts
Min.
Distance
to Edge
Mil-Spec
FH-M2.5-6ZC-U M2.5 x 0.45 1.95
mm
4.10
mm
6.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-8ZC-U M2.5 x 0.45 1.95
mm
4.10
mm
8.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-10ZC-U M2.5 x 0.45 1.95
mm
4.10
mm
10.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-12ZC-U M2.5 x 0.45 1.95
mm
4.10
mm
12.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-15ZC-U M2.5 x 0.45 1.95
mm
4.10
mm
15.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M2.5-18ZC-U M2.5 x 0.45 1.95
mm
4.10
mm
18.00
mm
1.00
mm
2.50
mm
3.10
mm
5.40
mm
N/A
FH-M3-6ZC-U M3 x 0.5 2.10
mm
4.60
mm
6.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-8ZC-U M3 x 0.5 2.10
mm
4.60
mm
8.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-10ZC-U M3 x 0.5 2.10
mm
4.60
mm
10.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-12ZC-U M3 x 0.5 2.10
mm
4.60
mm
12.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-15ZC-U M3 x 0.5 2.10
mm
4.60
mm
15.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-18ZC-U M3 x 0.5 2.10
mm
4.60
mm
18.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-20ZC-U M3 x 0.5 2.10
mm
4.60
mm
20.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3-25ZC-U M3 x 0.5 2.10
mm
4.60
mm
25.00
mm
1.00
mm
3.00
mm
3.60
mm
5.60
mm
N/A
FH-M3.5-6ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
6.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-8ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
8.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-10ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
10.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-12ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
12.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-15ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
15.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-18ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
18.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-20ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
20.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-25ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
25.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M3.5-30ZC-U M3.5 x 0.6 2.25
mm
5.30
mm
30.00
mm
1.00
mm
3.50
mm
4.10
mm
6.40
mm
N/A
FH-M4-6ZC-U M4 x 0.7 2.40
mm
5.90
mm
6.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-8ZC-U M4 x 0.7 2.40
mm
5.90
mm
8.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-10ZC-U M4 x 0.7 2.40
mm
5.90
mm
10.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-12ZC-U M4 x 0.7 2.40
mm
5.90
mm
12.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-15ZC-U M4 x 0.7 2.40
mm
5.90
mm
15.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-18ZC-U M4 x 0.7 2.40
mm
5.90
mm
18.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-20ZC-U M4 x 0.7 2.40
mm
5.90
mm
20.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-25ZC-U M4 x 0.7 2.40
mm
5.90
mm
25.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-30ZC-U M4 x 0.7 2.40
mm
5.90
mm
30.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M4-35ZC-U M4 x 0.7 2.40
mm
5.90
mm
35.00
mm
1.00
mm
4.00
mm
4.60
mm
7.20
mm
N/A
FH-M5-8ZC-U M5 x 0.8 2.70
mm
6.50
mm
8.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-10ZC-U M5 x 0.8 2.70
mm
6.50
mm
10.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-12ZC-U M5 x 0.8 2.70
mm
6.50
mm
12.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-15ZC-U M5 x 0.8 2.70
mm
6.50
mm
15.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-18ZC-U M5 x 0.8 2.70
mm
6.50
mm
18.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-20ZC-U M5 x 0.8 2.70
mm
6.50
mm
20.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-25ZC-U M5 x 0.8 2.70
mm
6.50
mm
25.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-30ZC-U M5 x 0.8 2.70
mm
6.50
mm
30.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M5-35ZC-U M5 x 0.8 2.70
mm
6.50
mm
35.00
mm
1.00
mm
5.00
mm
5.60
mm
7.20
mm
N/A
FH-M6-10ZC-U M6 x 1.0 3.00
mm
8.20
mm
10.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-12ZC-U M6 x 1.0 3.00
mm
8.20
mm
12.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-15ZC-U M6 x 1.0 3.00
mm
8.20
mm
15.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-18ZC-U M6 x 1.0 3.00
mm
8.20
mm
18.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-20ZC-U M6 x 1.0 3.00
mm
8.20
mm
20.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-25ZC-U M6 x 1.0 3.00
mm
8.20
mm
25.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-30ZC-U M6 x 1.0 3.00
mm
8.20
mm
30.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M6-35ZC-U M6 x 1.0 3.00
mm
8.20
mm
35.00
mm
1.60
mm
6.00
mm
6.60
mm
7.90
mm
N/A
FH-M8-12ZC-U M8 x 1.25 3.70
mm
9.60
mm
12.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-15ZC-U M8 x 1.25 3.70
mm
9.60
mm
15.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-18ZC-U M8 x 1.25 3.70
mm
9.60
mm
18.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-20ZC-U M8 x 1.25 3.70
mm
9.60
mm
20.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-25ZC-U M8 x 1.25 3.70
mm
9.60
mm
25.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-30ZC-U M8 x 1.25 3.70
mm
9.60
mm
30.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A
FH-M8-35ZC-U M8 x 1.25 3.70
mm
9.60
mm
35.00
mm
2.40
mm
8.00
mm
8.60
mm
9.60
mm
N/A

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

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