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
±.010
T
±.010
Minimum
Thickness
Hole Size
+.003
-.000
Minimum
Distance
Hole Center
to Edge
2–56 256 .030 .166 .190 .030 .165 .250 .070
.040 .038
.056 .054
3–48 348 .030 .166 .190 .030 .165 .250 .070
.040 .038
.056 .054
4–40 440 .030 .166 .190 .030 .165 .250 .070
.040 .038
.056 .054
.090 .087
6–32 632 .030 .1875 .220 .030 .187 .280 .070
.040 .038
.056 .054
.090 .087
8–32 832 .030 .213 .270 .030 .212 .310 .090
.040 .038
.056 .054
.090 .087
10–24 1024 .030 .250 .280 .030 .249 .340 .090
.040 .038
.056 .054
.090 .087
10–32 1032 .030 .250 .280 .030 .249 .340 .090
.040 .038
.056 .054
.090 .087
12–24 1224 .040 .277 .310 .038 .276 .370 .130
.056 .054
.090 .087
1/4–20 2520 .047 .344 .340 .045 .343 .440 .170
.056 .054
.090 .087
.125 .120
1/4–28 2528 .047 .344 .340 .045 .343 .440 .170
.056 .054
.090 .087
.125 .120
5/16–18 3118 .056 .413 .380 .054 .412 .500 .230
.090 .087
.125 .120
5/16–24 3124 .056 .413 .380 .054 .412 .500 .230
.090 .087
.125 .120
3/8–16 3716 .090 .500 .440 .087 .499 .560 .270
.125 .120
.250 .235
3/8–24 3724 .090 .500 .440 .087 .499 .560 .270
.125 .120
.250 .235
7/16–20 4320 .092 .562 .562 .087 .561 .687 .311
1/2–13 5013 .125 .656 .630 .120 .655 .810 .360
.250 .235
1/2–20 5020 .125 .656 .630 .120 .655 .810 .360
.250 .235
  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
±.010
T
±.010
Minimum
Thickness
Hole Size
+.003
-.000
Minimum
Distance
Hole Center
to Edge
2-56 256 .040 .166 .190 .038 .165 .250 .070
.056 .054
4-40 440 .040 .1875 .220 .038 .187 .250 .090
.056 .054
6-32 632 .040 .213 .270 .038 .212 .280 .090
.056 .054
8-32 832 .040 .234 .280 .038 .233 .310 .130
.056 .054
10-24 1024 .040 .296 .310 .038 .295 .370 .160
.056 .054
10-32 1032 .040 .296 .310 .038 .295 .370 .160
.056 .054
1/4-20 2520 .056 .344 .340 .054 .343 .440 .170
.091 .087
.125 .120
  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

All dimensions in inches

Thread
Code
Anvil Dimensions Anvil
Part
Number
Punch
Part
Number
A
±.002
P
+.005
256 / 348 / 440 .267 .045 TL1378 TL1695
632 .298 .045 TL1379 TL1695
832 .330 .070 TL1380 TL1695
1024 / 1032 .361 .070 TL1381 TL1695
1224 .387 .080 TL1382 TL1695
2520 / 2528 .454 .150 TL1383 TL1695
3118 / 3124 .517 .200 TL1384 TL1695
3716 / 3724 .280 .250 TL1385 TL1695
4320 .338 .295 TL1386 TL1696
5013 / 5020 .375 .345 TL1387 TL1696

Anvil and Punch Dimensions – Material Code AL

All dimensions in inches

Thread
Code
Anvil Dimensions Anvil
Part
Number
Punch
Part
Number
A
±.002
P
±.005
256 / 440 .267 .045 TL1378 TL1695
632 .298 .045 TL1379 TL1695
832 .330 .070 TL1380 TL1695
1024 / 1032 .392 .140 TL1684 TL1695
2520 .454 .150 TL1383 TL1695

NC – Self-Clinching Installation Image

Performance

Performance – Material Codes CT, ST & SS

Thread
Code
A
Shank
Length
Max.
Test
Sheet
Material
Installation
(lbs)
Push-out
(lbs)
Torque-out
(in-lbs)
256
348
440
.030 5052-H34
Aluminum
1500–2000 63 8
.038 90 10
.054 170 13
.087 170 13
.030 Cold-rolled
Steel
2500–3500 105 13
.038 125 15
.054 230 18
.087 230 18
632 .030 5052-H34
Aluminum
2500–3000 63 16
.038 95 17
.054 190 22
.087 190 22
.030 Cold-rolled
Steel
3000–6000 110 16
.038 130 20
.054 275 28
.087 275 28
832 .030 5052-H34
Aluminum
2500–3000 68 21
.038 105 23
.054 220 35
.087 220 35
.030 Cold-rolled
Steel
4000–6000 110 26
.038 145 35
.054 285 45
.087 285 45
1024
1032
.030 5052-H34
Aluminum
2500–3500 68 26
.038 110 32
.054 190 50
.087 225 50
.030 Cold-rolled
Steel
4000–6500 120 32
.038 180 40
.054 320 60
.087 320 60
1224 .038 5052-H34
Aluminum
2500–6500 120 63
.054 285 70
.087 285 70
.038 Cold-rolled
Steel
5000–6500 200 74
.054 350 80
.087 350 80
2520
2528
.045 5052-H34
Aluminum
4000–7000 220 70
.054 360 90
.087 360 125
.120 360 125
.045 Cold-rolled
Steel
6000–8000 315 115
.054 400 150
.087 400 150
.120 400 150
3118
3124
.054 5052-H34
Aluminum
4000–7000 380 120
.087 380 160
.120 380 160
.054 Cold-rolled
Steel
6000–8000 420 165
.087 420 180
.120 420 180
3716
3724
.087 5052-H34
Aluminum
5000–8000 400 270
.120 400 270
.235 400 270
.087 Cold-rolled
Steel
7000–11000 460 320
.120 460 320
.235 460 320
4320 .087 Cold-rolled
Steel
9000–13000 450 340
5013
5020
.120 5052-H34
Aluminum
7000–9000 475 350
.235 475 350
.120 Cold-rolled
Steel
10000–15000 1050 735
.235 1050 735

  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
(lbs)
Push-out
(lbs)
Torque-out
(in-lbs)
440 .038 5052-H34
Aluminum
800-1500 100 6
.054 800-1500 120 9
632 .038 5052-H34
Aluminum
1000-1500 110 21
.054 1200-1700 155 24
832 .038 5052-H34
Aluminum
1000-1500 120 27
.054 1300-1800 170 29
1024
1032
.038 5052-H34
Aluminum
1700-2200 130 34
.054 2600-3100 200 50

  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-1224-.038-PCLS-1224-1
NCSS-1224-.054-PCLS-1224-2
NCSS-1224-.087-PCLS-1224-3
NCSS-2520-.045-PCLS-0420-0
NCSS-2520-.054-PCLS-0420-1
NCSS-2520-.087-PCLS-0420-2
NCSS-2520-.120-PCLS-0420-3
NCSS-2528-.045-PCLS-0428-0
NCSS-2528-.054-PCLS-0428-1
NCSS-2528-.087-PCLS-0428-2
NCSS-2528-.120-PCLS-0428-3
NCSS-256-.030-PCLS-256-0
NCSS-256-.038-PCLS-256-1
NCSS-256-.054-PCLS-256-2
NCSS-3118-.054-PCLS-0518-1
NCSS-3118-.087-PCLS-0518-2
NCSS-3118-.120-PCLS-0518-3
NCSS-3124-.054-PCLS-0524-1
NCSS-3124-.087-PCLS-0524-2
NCSS-3124-.120-PCLS-0524-3
NCSS-348-.030-PCLS-348-0
NCSS-348-.038-PCLS-348-1
NCSS-348-.054-PCLS-348-2
NCSS-3716-.087-PCLS-0616-1
NCSS-3716-.120-PCLS-0616-2
NCSS-3716-.235-PCLS-0616-3
NCSS-3724-.087-PCLS-0624-1
NCSS-3724-.120-PCLS-0624-2
NCSS-3724-.235-PCLS-0624-3
NCSS-4320-.087-PCLS-0720-1
NCSS-440-.030-PCLS-440-0
NCSS-440-.038-PCLS-440-1
NCSS-440-.054-PCLS-440-2
NCSS-440-.087-PCLS-440-3
NCSS-5013-.120-PCLS-0813-1
NCSS-5013-.235-PCLS-0813-2
NCSS-5020-.120-PCLS-0820-1
NCSS-5020-.235-PCLS-0820-2
NCSS-632-.030-PCLS-632-0
NCSS-632-.038-PCLS-632-1
NCSS-632-.054-PCLS-632-2
NCSS-632-.087-PCLS-632-3
NCSS-832-.030-PCLS-832-0
NCSS-832-.038-PCLS-832-1
NCSS-832-.054-PCLS-832-2
NCSS-832-.087-PCLS-832-3
NCST-1024-.030-ZSS-024-0ZI
NCST-1024-.030-Z.SS-024-0ZI
NCST-1024-.038-ZSS-024-1ZI
NCST-1024-.054-ZSS-024-2ZI
NCST-1024-.087-ZSS-024-3ZI
NCST-1032-.030-ZSS-032-0ZI
NCST-1032-.038-ZSS-032-1ZI
NCST-1032-.038-Z.SS-032-1ZI
NCST-1032-.054-ZSS-032-2ZI
NCST-1032-.054-Z-BLKSS-032-2ZI-BLK
NCST-1032-.087-ZSS-032-3ZI
NCST-1224-.038-ZS-1224-1ZI
NCST-1224-.054-ZS-1224-2ZI
NCST-1224-.087-ZS-1224-3ZI
NCST-2520-.045-ZS-0420-0ZI
NCST-2520-.054-ZS-0420-1ZI
NCST-2520-.087-ZS-0420-2ZI
NCST-2520-.120-ZS-0420-3ZI
NCST-2528-.054-ZS-0428-1ZI
NCST-2528-.087-ZS-0428-2ZI
NCST-2528-.120-ZS-0428-3ZI
NCST-256-.030-ZS-256-0ZI
NCST-256-.038-ZS-256-1ZI
NCST-256-.054-ZS-256-2ZI
NCST-3.7-0.77-ZS-3.7-0ZI
NCST-3118-.054-ZS-0518-1ZI
NCST-3118-.087-ZS-0518-2ZI
NCST-3118-.120-ZS-0518-3ZI
NCST-3132-.054-ZS-0532-1ZI
NCST-348-.030-ZS-348-0ZI
NCST-348-.038-ZS-348-1ZI
NCST-348-.054-ZS-348-2ZI
NCST-3716-.087-ZS-0616-1ZI
NCST-3716-.120-ZS-0616-2ZI
NCST-3716-.235-ZS-0616-3ZI
NCST-3724-.087-ZS-0624-1ZI
NCST-3724-.120-ZS-0624-2ZI
NCST-4320-.087-ZS-0720-1ZI
NCST-440-.030-ZS-440-0ZI
NCST-440-.030-Z-PR3108S-440-0ZI
NCST-440-.038-ZS-440-1ZI
NCST-440-.054-ZS-440-2ZI
NCST-440-.087-ZS-440-3ZI
NCST-5013-.120-ZS-0813-1ZI
NCST-5020-.120-ZS-0820-1ZI
NCST-632-.030-ZS-632-0ZI
NCST-632-.038-ZS-632-1ZI
NCST-632-.038-Z-.090LGBODYS-632-1ZI.090LGBODY
NCST-632-.054-ZS-632-2ZI
NCST-632-.054-Z-BCLRS-632-2-Z-BCLR
NCST-632-.087-ZS-632-3ZI
NCST-832-.030-ZS-832-0ZI
NCST-832-.038-ZS-832-1ZI
NCST-832-.054-ZS-832-2ZI
NCST-832-.087-ZYS-37437-ZI