NC | Self-Clinching

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Features

  • Provide load-bearing threads in thin sheets.
  • Available in a broad selection of inch and metric thread sizes.
  • Self-clinching design provides quick and permanent installation in a variety of aluminum and cold-rolled steel sheet thicknesses.
  • Choice of RoHS-compliant materials and finishes.

Sheet metal displaced by the knurled band during installation flows into the undercut creating a mechanical lock with the sheet metal providing high push-out and torque-out resistance.

General

General – Material Codes CT, ST & SS

All dimensions in inches

Thread Thread
Code
Sheet A
Shank
Length
Max.
C
Max.
E
±0.25
T
±0.25
Minimum
Thickness
Hole Size
+0.08
-0.00
Minimum
Distance
Hole Center
to Edge
M2 x 0.4 M2 0.80 4.22 4.80 0.77 4.20 6.35 1.50
1.00 0.97
1.40 1.38
M2.5 x 0.45 M2.5 0.80 4.22 4.80 0.77 4.20 6.35 1.50
1.00 0.97
1.40 1.38
M3 x 0.5 M3 0.80 4.22 4.80 0.77 4.20 6.35 1.50
1.00 0.97
1.40 1.38
M3.5 x 0.6 M3.5 0.80 4.75 5.60 0.77 4.73 7.11 1.50
1.00 0.97
1.40 1.38
M4 x 0.7 M4 0.80 5.41 6.90 0.77 5.38 7.87 2.00
1.00 0.97
1.40 1.38
M5 x 0.8 M5 0.80 6.35 7.10 0.77 6.33 8.64 2.00
1.00 0.97
1.40 1.38
M6 x 1.0 M6 0.92 8.75 8.60 0.89 8.73 11.18 4.08
1.20 1.15
1.40 1.38
2.29 2.21
M8 x 1.25 M8 1.40 10.50 9.70 1.38 10.47 12.70 5.47
2.29 2.21
M10 x 1.5 M10 2.29 14.00 13.50 2.21 13.97 17.35 7.48
3.18 3.05
M12 x 1.75 M12 3.18 17.00 16.00 3.05 16.95 20.57 8.50
  1. For best performance, use the maximum shank length available for the application sheet thickness.
  2. Custom sizes available by request.

General – Material Code AL

All dimensions in inches

Thread Thread
Code
Sheet A
Shank
Length
Max.
C
Max.
E
±0.25
T
±0.25
Minimum
Thickness
Hole Size
+0.08
-0.00
Minimum
Distance
Hole Center
to Edge
M2 x 0.4 M2 1.00 4.22 4.80 0.98 4.20 6.35 1.50
1.40 1.38
M3 x 0.5 M3 1.00 4.75 5.60 0.98 4.73 6.35 2.00
1.40 1.38
M3.5 x 0.6 M3.5 1.00 5.41 6.90 0.98 5.38 7.11 2.00
1.40 1.38
M4 x 0.7 M4 1.00 5.94 7.10 0.98 5.92 7.80 3.00
1.40 1.38
M5 x 0.8 M5 1.00 7.52 7.90 0.98 7.49 9.40 3.80
1.40 1.38
M6 x 1.0 M6 1.40 8.75 8.60 1.38 8.73 11.18 4.08
2.30 2.21
  1. For best performance, use the maximum shank length available for the application sheet thickness.
  2. Custom sizes available by request.

Material & Finish

Material
Code
Material Description Finish
Code
Finish Description For Use in Sheet Hardness
HRB
80 Max.
HRB
70 Max.
HRB
50 Max.
CT (1) Cold Formed Carbon Steel Z Zinc (SC1) with Type III Clear Chromate per ASTM B 633
ST (1) Heat Treated Carbon Steel Z Zinc (SC1) with Type III Clear Chromate per ASTM B 633
SS 300–Series Stainless Steel P Passivated and/or tested per ASTM A 967
AL Aluminum PLN Plain
  1. Use CT material code for nuts with (E) body diameters .250” thru .440” and 6.35mm thru 11.18mm; and ST material code for nuts with (E) body diameters .500” thru .810”, 12.70mm, 17.35mm and 20.57mm.
  2. Custom materials and finishes available by request.

Installation

  1. Prepare correct sized mounting hole in sheet away from bends or other highly cold-worked areas. Do not deburr hole edges.
  2. Insert nut into anvil recess or over anvil pin, depending on anvil type required. Place sheet hole over the nut shank as shown with hole punch side of sheet against the nut.
  3. Squeeze the sheet and nut between parallel anvil and punch surfaces. Use only enough pressure to seat the nut shoulder flush with the sheet. Anvils and punches may be ordered using the part numbers shown in the tables below; or made from hardened tool steel.
  4. In the application install screw from the shank side of the fastener so that the head side of the nut is drawn toward the sheet.
NC – Self-Clinching Installation Image

Anvil & Punch

Anvil and Punch Dimensions – Material Codes CT, ST & SS

Thread
Code
Anvil Dimensions Anvil
Part
Number
Punch
Part
Number
A
±0.05
P
±0.13
M2 / M2.5 / M3 6.78 1.14 TL1378 TL1695
M3.5 7.57 1.14 TL1379 TL1695
M4 8.38 1.78 TL1380 TL1695
M5 9.17 1.78 TL1381 TL1695
M6 11.53 3.81 TL1383 TL1695
M8 13.13 5.08 TL1384 TL1695
M10 7.62 6.35 TL1388 TL1696
M12 9.53 8.76 TL1387 TL1696

Anvil and Punch Dimensions – Material Code AL

Thread
Code
Anvil Dimensions Anvil
Part
Number
Punch
Part
Number
A
±0.05
P
±0.13
M2 / M3 6.78 1.14 TL1378 TL1695
M3.5 7.57 1.14 TL1379 TL1695
M4 8.38 1.78 TL1380 TL1695
M5 9.96 3.56 TL1684 TL1695
M6 11.53 3.81 TL1383 TL1695

NC – Self-Clinching Installation Image

Performance

Performance – Material Codes CT, ST & SS

Thread
Code
A
Shank
Length
Max.
Test
Sheet
Material
Installation
(kN)
Push-out
(N)
Torque-out
(N-m)
M2
M2.5
M3
0.77 5052-H34
Aluminum
6.7–8.9 280 0.90
0.97 400 1.13
1.38 750 1.47
0.77 Cold-rolled
Steel
11.2–15.6 470 1.47
0.97 550 1.70
1.38 1010 2.03
M3.5 0.77 5052-H34
Aluminum
11.2–13.5 280 1.80
0.97 400 1.92
1.38 840 2.50
0.77 Cold-rolled
Steel
13.4–26.7 480 1.80
0.97 570 2.30
1.38 1210 2.30
M4 0.77 5052-H34
Aluminum
11.2–13.4 300 2.37
0.97 470 2.60
1.38 970 4.00
0.77 Cold-rolled
Steel
18.0 –27.0 490 2.95
0.97 645 4.00
1.38 1250 5.10
M5 0.77 5052-H34
Aluminum
11.2–15.6 300 3.00
0.97 480 3.60
1.38 845 5.70
0.77 Cold-rolled
Steel
18.0–28.9 530 3.60
0.97 800 4.50
1.38 1112 6.80
M6 0.89 5052-H34
Aluminum
18.0–32.0 750 6.50
1.15 970 7.90
1.38 1580 10.2
2.21 1580 14.1
0.89 Cold-rolled
Steel
27.0–36.0 900 10.0
1.15 1380 13.0
1.38 1760 17.0
2.21 1760 17.0
M8 1.38 5052-H34
Aluminum
18.0–32.0 1570 13.6
2.21 1570 18.1
1.38 Cold-rolled
Steel
27.0 –36.0 1870 18.7
2.21 1870 20.3
M10 2.21 5052-H34
Aluminum
22.0–36.0 1760 32.7
3.05 1760 32.7
2.21 Cold-rolled
Steel
32.0–50.0 2020 36.2
3.05 2020 36.2
M12 3.05 5052-H34
Aluminum
31.0–40.0 2113 39.5
3.05 Cold-rolled
Steel
44.0–67.0 4670 83.1

  1. Performance data are reference averages based on commonly reported industry values when all installation specifications are strictly followed. Variations in panel hole size, thickness, material, and installation method will affect the loads. PENCOM strongly encourages testing in the application.

Performance – Material Code AL

Thread
Code
A
Shank
Length
Max.
Test
Sheet
Material
Installation
(kN)
Push-out
(N)
Torque-out
(N-m)
M2 1.38 5052-H34
Aluminum
3.56-6.67 500 0.40
M3 0.98 5052-H34
Aluminum
3.56-6.67 445 0.68
1.38 3.56-6.67 534 1.02
M4 0.98 5052-H34
Aluminum
4.45-6.67 534 3.05
1.38 5.78-8.01 756 3.27

  1. Performance data are reference averages based on commonly reported industry values when all installation specifications are strictly followed. Variations in panel hole size, thickness, material, and installation method will affect the loads. PENCOM strongly encourages testing in the application.

Cross References

Subsitute For PEM® Series: CLA, CLS, CLSS, S, SS

PEM® is a registered trademark of Penn Engineering.

PENCOM Part Description PEM® Part Number
NCSS-M10-2.21-PCLS-M10-1
NCSS-M10-3.05-PCLS-M10-2
NCSS-M12-3.05-PCLS-M12-1
NCSS-M2.5-0.77-PCLS-M2.5-0
NCSS-M2.5-0.97-PCLS-M2.5-1
NCSS-M2.5-1.38-PCLS-M2.5-2
NCSS-M2-0.77-PCLS-M2-0
NCSS-M2-0.97-PCLS-M2-1
NCSS-M2-1.38-PCLS-M2-2
NCSS-M3.5-0.77-PCLS-M3.5-0
NCSS-M3.5-0.97-PCLS-M3.5-1
NCSS-M3.5-1.38-PCLS-M3.5-2
NCSS-M3-0.77-PCLS-M3-0
NCSS-M3-0.97-PCLS-M3-1
NCSS-M3-1.38-PCLS-M3-2
NCSS-M3-2.21-PCLS-M3-3
NCSS-M4-0.77-PCLS-M4-0
NCSS-M4-0.97-PCLS-M4-1
NCSS-M4-1.38-PCLS-M4-2
NCSS-M5-0.77-PCLSS-M5-0
NCSS-M5-0.97-PCLSS-M5-1
NCSS-M5-0.97-P-OLDCLSS-M5-1
NCSS-M5-1.38-PCLSS-M5-2
NCSS-M6-0.89-PCLS-M6-00
NCSS-M6-1.15-PCLS-M6-0
NCSS-M6-1.38-PCLS-M6-1
NCSS-M6-2.21-PCLS-M6-2
NCSS-M8-1.38-PCLS-M8-1
NCSS-M8-2.21-PCLS-M8-2NCST-M10-2.21-Z
NCST-M10-3.05-ZS-M10-2ZI
NCST-M12-1-ZS-M12-1ZI
NCST-M2.5-0.77-ZS-M2.5-0ZI
NCST-M2.5-0.97-ZS-M2.5-1ZI
NCST-M2.5-0.97-Z-PR3534S-M2.5-1-ZI-CUSTOM
NCST-M2.5-1.38-ZS-M2.5-2ZI
NCST-M2-0.77-ZS-M2-0Z
NCST-M2-0.97-ZS-M2-1ZI
NCST-M2-1.38-ZS-M2-2ZI
NCST-M3.5-0.77-ZS-M3.5-0ZI
NCST-M3.5-0.97-ZS-M3.5-1ZI
NCST-M3.5-1.38-ZS-M3.5-2ZI
NCST-M3-0.77-ZS-M3-0ZI
NCST-M3-0.77-Z-ROHSS-M3-0ZI
NCST-M3-0.97-ZS-M3-1ZI
NCST-M3-0.97-Z-100DGCSKS-M3-1ZI
NCST-M3-1.38-ZS-M3-2ZI
NCST-M3-3.05-ZS-M8-3ZI
NCST-M4-0.77-ZS-M4-0ZIMOD
NCST-M4-0.77-Z-CUSTS-M4-0ZIMOD
NCST-M4-0.97-ZS-M4-1ZI
NCST-M4-0.97-Z-BLKS-M4-1ZB
NCST-M4-1.38-ZS-M4-2ZI
NCST-M5-0.77-ZSS-M5-0ZI
NCST-M5-0.87-ZSS-M5-3ZI
NCST-M5-0.97-ZSS-M5-1ZI
NCST-M5-0.97-Z-2.50LGBODYSS-M5-1ZI-2.50LGBODY
NCST-M5-1.38-ZSS-M5-2ZI
NCST-M5-1.38-Z-5MMTALLSS-M5-2ZI-5MMTALL
NCST-M6-0.89-ZS-M6-00ZI
NCST-M6-1.15-ZS-M6-0ZI
NCST-M6-1.38-ZS-M6-1ZI
NCST-M6-2.21-ZS-M6-2ZI
NCST-M8-1.38-ZS-M8-1ZI
NCST-M8-2.21-ZS-M8-2ZI