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Standard Nuts  CLS-U,  CLSS-U

Self Clinching Fasteners  •  Nuts For Sheet Metal
American Standard (Inches) & Metric Sizes
• Self-clinching     • Used as load-bearing threads in stainless steel panels
• High push-out and torque resistance     • Installed quickly and easily by squeezing
American Standard Sizes:   • Series CLS-U, CLSS-U
Metric Sizes:   • Series CLS-U, CLSS-U
Series  CLS-U,  CLSS-U
Series  CLS-U, CLSS-U  /  American Standard Sizes
      • Shape-  Round
      • Sheet Hardness-  HRB 70 / HB 125 or Less
      • Material-  300 Series Stainless Steel
      • Finish-  Passivated per ASTM A380
Series CLS-U, CLSS-U
American Standard Sizes
(SAE)
Part
Number
Thread "A"
(Shank)
Max.
"T"
Head
Height
"E"
Head
Height
"C" Max.
Body
Diameter
Min.
Sheet
Thickness
Hole
Size in
Sheet
Min.
Distance
to Edge
Mil-Spec
CLS-256-0-U 2-56 0.030" 0.070" 0.250" 0.165" 0.030" 0.166" 0.190" M45938/1-1C
CLS-256-1-U 2-56 0.038" 0.070" 0.250" 0.165" 0.040" 0.166" 0.190" M45938/1-2C
CLS-256-2-U 2-56 0.054" 0.070" 0.250" 0.165" 0.056" 0.166" 0.190" N/A
 
CLS-348-0-U 3-48 0.030" 0.070" 0.250" 0.165" 0.030" 0.166" 0.190" N/A
CLS-348-1-U 3-48 0.038" 0.070" 0.250" 0.165" 0.040" 0.166" 0.190" N/A
CLS-348-2-U 3-48 0.054" 0.070" 0.250" 0.165" 0.056" 0.166" 0.190" N/A
 
CLS-440-0-U 4-40 0.030" 0.070" 0.250" 0.165" 0.030" 0.166" 0.190" M45938/1-3C
CLS-440-1-U 4-40 0.038" 0.070" 0.250" 0.165" 0.040" 0.166" 0.190" M45938/1-4C
CLS-440-2-U 4-40 0.054" 0.070" 0.250" 0.165" 0.056" 0.166" 0.190" M45938/1-5C
CLS-440-3-U 4-40 0.087" 0.070" 0.250" 0.165" 0.090" 0.166" 0.190" N/A
 
CLS-632-0-U 6-32 0.030" 0.070" 0.280" 0.187" 0.030" 0.188" 0.220" N/A
CLS-632-1-U 6-32 0.038" 0.070" 0.280" 0.187" 0.040" 0.188" 0.220" M45938/1-8C
CLS-632-2-U 6-32 0.054" 0.070" 0.280" 0.187" 0.056" 0.188" 0.220" M45938/1-9C
CLS-632-3-U 6-32 0.087" 0.070" 0.280" 0.187" 0.090" 0.188" 0.220" N/A
 
CLS-832-0-U 8-32 0.030" 0.090" 0.310" 0.212" 0.030" 0.213" 0.270" N/A
CLS-832-1-U 8-32 0.038" 0.090" 0.310" 0.212" 0.040" 0.213" 0.270" M45938/1-12C
CLS-832-2-U 8-32 0.054" 0.090" 0.310" 0.212" 0.056" 0.213" 0.270" M45938/1-13C
CLS-832-3-U 8-32 0.087" 0.090" 0.310" 0.212" 0.090" 0.213" 0.270" N/A
 
CLSS-024-0-U 10-24 0.030" 0.090" 0.340" 0.249" 0.030" 0.250" 0.280" N/A
CLSS-024-1-U 10-24 0.038" 0.090" 0.340" 0.249" 0.040" 0.250" 0.280" N/A
CLSS-024-2-U 10-24 0.054" 0.090" 0.340" 0.249" 0.056" 0.250" 0.280" N/A
CLSS-024-3-U 10-24 0.087" 0.090" 0.340" 0.249" 0.090" 0.250" 0.280" N/A
 
CLSS-032-0-U 10-32 0.030" 0.090" 0.340" 0.249" 0.030" 0.250" 0.280" N/A
CLSS-032-1-U 10-32 0.038" 0.090" 0.340" 0.249" 0.040" 0.250" 0.280" N/A
CLSS-032-2-U 10-32 0.054" 0.090" 0.340" 0.249" 0.056" 0.250" 0.280" M45938/1-16C
CLSS-032-3-U 10-32 0.087" 0.090" 0.340" 0.249" 0.090" 0.250" 0.280" M45938/1-17C
 
CLS-1224-1-U 12-24 0.038" 0.130" 0.370" 0.276" 0.040" 0.277" 0.310" N/A
CLS-1224-2-U 12-24 0.054" 0.130" 0.370" 0.276" 0.056" 0.277" 0.310" N/A
CLS-1224-3-U 12-24 0.087" 0.130" 0.370" 0.276" 0.090" 0.277" 0.310" N/A
 
CLS-0420-0-U 1/4-20 0.045" 0.170" 0.440" 0.343" 0.047" 0.344" 0.340" N/A
CLS-0420-1-U 1/4-20 0.054" 0.170" 0.440" 0.343" 0.056" 0.344" 0.340" M45938/1-27C
CLS-0420-2-U 1/4-20 0.087" 0.170" 0.440" 0.343" 0.090" 0.344" 0.340" M45938/1-28C
CLS-0420-3-U 1/4-20 0.120" 0.170" 0.440" 0.343" 0.125" 0.344" 0.340" M45938/1-29C
 
CLS-0428-1-U 1/4-28 0.054" 0.170" 0.440" 0.343" 0.056" 0.344" 0.340" N/A
CLS-0428-2-U 1/4-28 0.087" 0.170" 0.440" 0.343" 0.090" 0.344" 0.340" M45938/1-19C
CLS-0428-3-U 1/4-28 0.120" 0.170" 0.440" 0.343" 0.125" 0.344" 0.340" M45938/1-20C
 
CLS-0518-1-U 5/16-18 0.054" 0.230" 0.500" 0.412" 0.056" 0.413" 0.380" N/A
CLS-0518-2-U 5/16-18 0.087" 0.230" 0.500" 0.412" 0.090" 0.413" 0.380" N/A
CLS-0518-3-U 5/16-18 0.120" 0.230" 0.500" 0.412" 0.125" 0.413" 0.380" N/A
 
CLS-0524-1-U 5/16-24 0.054" 0.230" 0.500" 0.412" 0.056" 0.413" 0.380" N/A
CLS-0524-2-U 5/16-24 0.087" 0.230" 0.500" 0.412" 0.090" 0.413" 0.380" M45938/1-21C
CLS-0524-3-U 5/16-24 0.120" 0.230" 0.500" 0.412" 0.125" 0.413" 0.380" M45938/1-22C
 
CLS-0616-1-U 3/8-16 0.087" 0.270" 0.560" 0.499" 0.090" 0.500" 0.440" N/A
CLS-0616-2-U 3/8-16 0.120" 0.270" 0.560" 0.499" 0.125" 0.500" 0.440" N/A
CLS-0616-3-U 3/8-16 0.235" 0.270" 0.560" 0.499" 0.250" 0.500" 0.440" N/A
 
CLS-0624-1-U 3/8-24 0.087" 0.270" 0.560" 0.499" 0.090" 0.500" 0.440" N/A
CLS-0624-2-U 3/8-24 0.120" 0.270" 0.560" 0.499" 0.125" 0.500" 0.440" M45938/1-23C
CLS-0624-3-U 3/8-24 0.235" 0.270" 0.560" 0.499" 0.250" 0.500" 0.440" M45938/1-24C
 
CLS-0813-1-U 1/2-13 0.120" 0.360" 0.810" 0.655" 0.125" 0.656" 0.630" N/A
CLS-0813-2-U 1/2-13 0.235" 0.360" 0.810" 0.655" 0.250" 0.656" 0.630" N/A
 
CLS-0820-1-U 1/2-20 0.120" 0.360" 0.810" 0.655" 0.125" 0.656" 0.630" M45938/1-25C
CLS-0820-2-U 1/2-20 0.235" 0.360" 0.810" 0.655" 0.250" 0.656" 0.630" M45938/1-26C
Series  CLS-U, CLSS-U  /  Metric Sizes
      • Shape-  Round
      • Sheet Hardness-  HRB 70 / HB 125 or Less
      • Material-  300 Series Stainless Steel
      • Finish-  Passivated per ASTM A380
Series CLS-U, CLSS-U
Metric Sizes
Part
Number
Thread "A"
(Shank)
Max.
"T"
Head
Height
"E"
Head
Height
"C" Max.
Body
Diameter
Min.
Sheet
Thickness
Hole
Size in
Sheet
Min.
Distance
to Edge
Mil-Spec
CLS-M2-0-U M2 x 0.4 0.77
mm
1.50
mm
6.35
mm
4.2
mm
0.80
mm
4.22
mm
4.80
mm
N/A
CLS-M2-1-U M2 x 0.4 0.97
mm
1.50
mm
6.35
mm
4.2
mm
1.00
mm
4.22
mm
4.80
mm
N/A
CLS-M2-2-U M2 x 0.4 1.38
mm
1.50
mm
6.35
mm
4.2
mm
1.40
mm
4.22
mm
4.80
mm
N/A
 
CLS-M2.5-0-U M2.5 x 0.45 0.77
mm
1.50
mm
6.35
mm
4.2
mm
0.80
mm
4.22
mm
4.80
mm
N/A
CLS-M2.5-1-U M2.5 x 0.45 0.97
mm
1.50
mm
6.35
mm
4.2
mm
1.00
mm
4.22
mm
4.80
mm
N/A
CLS-M2.5-2-U M2.5 x 0.45 1.38
mm
1.50
mm
6.35
mm
4.2
mm
1.40
mm
4.22
mm
4.80
mm
N/A
 
CLS-M3-0-U M3 x 0.5 0.77
mm
1.50
mm
6.35
mm
4.2
mm
0.80
mm
4.22
mm
4.80
mm
N/A
CLS-M3-1-U M3 x 0.5 0.97
mm
1.50
mm
6.35
mm
4.2
mm
1.00
mm
4.22
mm
4.80
mm
N/A
CLS-M3-2-U M3 x 0.5 1.38
mm
1.50
mm
6.35
mm
4.2
mm
1.40
mm
4.22
mm
4.80
mm
N/A
 
CLS-M3.5-0-U M3.5 x 0.6 0.77
mm
1.50
mm
7.11
mm
4.73
mm
0.80
mm
4.75
mm
5.60
mm
N/A
CLS-M3.5-1-U M3.5 x 0.6 0.97
mm
1.50
mm
7.11
mm
4.73
mm
1.00
mm
4.75
mm
5.60
mm
N/A
CLS-M3.5-2-U M3.5 x 0.6 1.38
mm
1.50
mm
7.11
mm
4.73
mm
1.40
mm
4.75
mm
5.60
mm
N/A
 
CLS-M4-0-U M4 x 0.7 0.77
mm
2.00
mm
7.87
mm
5.38
mm
0.80
mm
5.41
mm
6.90
mm
N/A
CLS-M4-1-U M4 x 0.7 0.97
mm
2.00
mm
7.87
mm
5.38
mm
1.00
mm
5.41
mm
6.90
mm
N/A
CLS-M4-2-U M4 x 0.7 1.38
mm
2.00
mm
7.87
mm
5.38
mm
1.40
mm
5.41
mm
6.90
mm
N/A
 
CLSS-M5-0-U M5 x 0.8 0.77
mm
2.00
mm
8.64
mm
6.33
mm
0.80
mm
6.35
mm
7.10
mm
N/A
CLSS-M5-1-U M5 x 0.8 0.97
mm
2.00
mm
8.64
mm
6.33
mm
1.00
mm
6.35
mm
7.10
mm
N/A
CLSS-M5-2-U M5 x 0.8 1.38
mm
2.00
mm
8.64
mm
6.33
mm
1.40
mm
6.35
mm
7.10
mm
N/A
 
CLS-M6-00-U M6 x 1.0 0.89
mm
4.08
mm
11.18
mm
8.73
mm
0.92
mm
8.75
mm
8.60
mm
N/A
CLS-M6-0-U M6 x 1.0 1.15
mm
4.08
mm
11.18
mm
8.73
mm
1.20
mm
8.75
mm
8.60
mm
N/A
CLS-M6-1-U M6 x 1.0 1.38
mm
4.08
mm
11.18
mm
8.73
mm
1.40
mm
8.75
mm
8.60
mm
N/A
CLS-M6-2-U M6 x 1.0 2.21
mm
4.08
mm
11.18
mm
8.73
mm
2.29
mm
8.75
mm
8.60
mm
N/A
 
CLS-M8-1-U M8 x 1.25 1.38
mm
5.47
mm
12.70
mm
10.47
mm
1.40
mm
10.50
mm
9.70
mm
N/A
CLS-M8-2-U M8 x 1.25 2.21
mm
5.47
mm
12.70
mm
10.47
mm
2.29
mm
10.50
mm
9.70
mm
N/A
 
CLS-M10-1-U M10 x 1.5 2.21
mm
7.48
mm
17.35
mm
13.97
mm
2.31
mm
14.00
mm
13.50
mm
N/A
CLS-M10-2-U M10 x 1.5 3.05
mm
7.48
mm
17.35
mm
13.97
mm
3.18
mm
14.00
mm
13.50
mm
N/A

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