3D CAD Models available. Contact a PENCOM Account Representative to request.

Part Description Example

  • SBSTMaterial
    Code
  • 632Thread
    Code
  • 1.250Length
  • ZFinish
    Code
Request A Quote

*Contact a PENCOM Account Representative for the part number based on the description.

Features

  • Provide permanent male threads in sheets as thin as .040” (1.00mm).
  • Ribbed self-clinching design mounts flush on the back of the sheet while transferring excellent push-out and torque-out resistance.
  • Available in a wide variety of materials, finishes and sizes.
  • Options include: thread locking, anti–cross threading, self–lubricated threads, and dog point.
sb-flush-example
Flush–head studs join mating panels with a standard nut and washer. PENCOM also carries an assortment of nut and washer assemblies (shown).

sb-features

General – Material Codes ST, SS, & AL

Inch

ThreadThread
Code
SheetMaximum Hole Size
in Attached Parts
H
±.015
S
Max.
Minimum
Thickness
Hole Size
+.003
- .000
Minimum Distance
Hole Center to Edge
2-56256.040.085.187.105.144.075
4-40440.040.111.219.135.176.085
6-32632.040.137.250.160.206.090
8-32832.040.163.281.185.237.090
10-241024.040.189.281.210.256.100
10-321032.040.189.281.210.256.100
1/4-202520.062.249.312.270.337.135
5/16-1813118.093.311.375.333.376.160
(1) Thread size not available for AL material code.

Metric

ThreadThread
Code
SheetMaximum Hole Size
in Attached Parts
H
±0.4
S
Max.
Minimum ThicknessHole Size
+0.08
- 0.00
Minimum Distance
Hole Center to Edge
M2.5 x 0.45M2.51.02.505.43.14.11.95
M3 x 0.5M31.03.005.63.64.62.10
M3.5 x 0.6M3.51.03.506.44.15.32.25
M4 x 0.7M41.04.007.24.65.92.40
M5 x 0.8M51.05.007.25.66.52.70
M6 x 1.0M61.66.007.96.68.23.00
M8 x 1.251M82.48.009.68.69.63.70
(1) Thread size not available for AL material code.

General – Material Codes S4 & SP

Inch

ThreadThread
Code
SheetMaximum Hole Size
in Attached Parts
H
±.015
S
Max.
ThicknessHole Size
+.003
- .000
Minimum Distance
Hole Center to Edge
4-40440.040 - .095.111.219.135.176.085
6-32632.040 - .095.137.250.160.206.090
8-32832.040 - .095.163.281.185.237.090
10-321032.040 - .095.189.281.210.256.100
1/4-2012520.062 - .117.249.312.270.337.135
(1) Thread size not available for AL material code.

Metric

ThreadThread
Code
SheetMaximum Hole Size
in Attached Parts
H
±0.4
S
Max.
ThicknessHole Size
+0.08
- 0.00
Minimum Distance
Hole Center to Edge
M3 x 0.5M31.0 - 2.43.005.63.64.62.1
M4 x 0.7M41.0 - 2.44.007.24.65.92.4
M5 x 0.8M51.0 - 2.45.007.25.66.52.7
M6 x 1.01M61.6 - 3.06.007.96.68.23.0
(1) Thread size not available for SP material code.

Length – Material Codes ST, SS, & AL

Inch

Thread
Code
L (Length) ±.015
256.250.312.375.500.625.750----
440.250.312.375.500.625.750.8751.0001.250-
632.250.312.375.500.625.750.8751.0001.2501.500
832.250.312.375.500.625.750.8751.0001.2501.500
1024-.312.375.500.625.750.8751.0001.2501.500
1032-.312.375.500.625.750.8751.0001.2501.500
2520--.375.500.625.750.8751.0001.2501.500
3118---.500.625.750.8751.0001.2501.500

Metric

Thread
Code
L (Length) ±0.4
M2.56810121518----
M368101215182025--
M3.56810121518202530-
M4681012151820253035
M5-81012151820253035
M6--1012151820253035
M8---12151820253035

Length – Material Codes S4 & SP

Inch

Thread
Code
L (Length) ±.015
440.250.312.375.500.625.750.8751.000--
632.250.312.375.500.625.750.8751.0001.2501.500
832.250.312.375.500.625.750.8751.0001.2501.500
1032-.312.375.500.625.750.8751.0001.2501.500
25201--.375.500.625.750.8751.0001.2501.500
(1) Thread size not available for SP material code.

Metric

Thread
Code
L (Length) ±0.4
M368101215182025--
M4681012151820253035
M5-81012151820253035
M61--1012151820253035
(1) Thread size not available for SP material code.

Length – Material & Finish

Material
Code
Material
Description
Finish
Code
Finish
Description
For Use in Sheet Hardness
HRB 50 max.HRB 70 max.HRB 80 max.HRB 92 max.
STHeat Treated Carbon SteelZZinc (SC1) with Type III Clear Chromate per ASTM B 633
SS300-Series
Stainless Steel
PPassivated and/or tested per ASTM A 967
ALAluminumPLNPlain
S4400-Series Heat-treated
Stainless Steel
PPassivated and/or tested per ASTM A 967
SPA286 Age-hardened
Stainless Steel
PPassivated and/or tested per ASTM A 967

Installation – Material Codes ST, SS, & AL

  1. Punch or drill hole in sheet. Do not deburr edges.
  2. Insert stud through hole in sheet and into the anvil as shown below.
  3. Squeeze the sheet and stud head between parallel punch and anvil surfaces. Use only enough pressure to seat the stud head flush with the sheet.
  4. Anvil with countersink is required for installation in sheets with thicknesses less than .060” (1.51mm) for #2 thru #10 and M3 thru M5 thread sizes, and less than .093” (2.40mm) for 1/4” and M6 thread sizes. Punch and anvil should be made from hardened tool steel.

Anvil Dimensions – Material Codes ST, SS, & AL

Inch

Thread
Code
AB
256.090/.087.114/.110
440.116/.113.140/.136
632.142/.139.166/.162
832.168/.165.192/.188
1024, 1032.194/.191.220/.216
2520.253/.250.300/.295
3118.3155/.3125.338/.334

Metric

Thread
Code
AB
M2.52.61/2.533.2/3.1
M33.11/3.033.7/3.6
M3.53.61/3.564.2/4.1
M44.11/4.034.7/4.6
M55.11/5.035.7/5.6
M66.03/6.116.7/6.6
M88.11/8.038.7/8.6

Installation – Material Codes S4 & SP

  1. Punch or drill hole in sheet. Do not deburr edges.
  2. Insert stud through hole in sheet and into the anvil as shown below.
  3. Squeeze the sheet and stud head between parallel punch and anvil surfaces. Use only enough pressure to seat the stud head flush with the sheet.
  4. An anvil with raised ring is required to properly displace the stainless steel sheet material and create the self–clinching union. Punch and anvil should be made from hardened tool steel with anvil having a minimum hardness of HRC 55. The anvil “D” dimension should be measured after every 5,000 installations to ensure conformity with specifications.

sb-installation-materials

Anvil Dimensions – Material Codes S4 & SP

Inch

Thread
Code
A
+.003
-.000
B
±.002
C
±.002
D
±.001
R1 max.R2 max.
440.113.144.174.010.003.005
632.140.170.200.010.003.005
832.166.202.236.010.003.005
1032.191.235.275.010.003.005
2520.252.324.360.020.003.005

Metric

Thread
Code
A
+0.08
-0.00
B
±0.05
C
±0.05
D
±0.025
R1 max.R2 max.
M33.053.814.570.250.080.13
M44.044.955.820.250.080.13
M55.086.157.160.250.080.13
M66.057.878.790.510.080.13

Performance – Material Codes ST & SS

Inch

Thread
Code
Stud Material
Code
Max. Nut Tightening
Torque (in-lbs)2
Test SheetInstallation
(lbs)
Push-out
(lbs)
Torque-out
(in-lbs)
Pull-thru
(lbs)
MaterialThickness
(in)
Hardness
(HRB)
256ST2.3Aluminum.0622920001005.0425
Carbon Steel.0605925001805.0425
SS2.3Aluminum.0622920001004.5300
Carbon Steel.0605925001804.5300
440ST5.0Aluminum.06429380017010650
Carbon Steel.06059430027510650
SS5.0Aluminum.0642932001708.0500
Carbon Steel.0605947002758.0500
632ST9.0Aluminum.06429380018017850
Carbon Steel.06059470030020850
SS9.0Aluminum.06429350018016775
Carbon Steel.06059500030016775
832ST17Aluminum.064294800220281000
Carbon Steel.060596800375401270
SS17Aluminum.06429450022028940
Carbon Steel.060595500375281130
1024ST24Aluminum.064295500270301220
Carbon Steel.060597500450601410
SS24Aluminum.064295500270301220
Carbon Steel.060596800450501410
1032ST27Aluminum.064295500270301220
Carbon Steel.060597500450601410
SS27Aluminum.064295500270301220
Carbon Steel.060596800450501410
2520ST58Aluminum.093286500310652300
Carbon Steel.0884695005751002550
SS58Aluminum.093286500310652100
Carbon Steel.08846100005751002550
3118ST120Aluminum.0932865004301002260
Carbon Steel.09346100006501753475
SS120Aluminum.0932867004301002260
Carbon Steel.09346112006501753120
(1) Performance data represents the average destructive result 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.
(2) Maximum recommended tightening torques for studs with material code AL are 60 percent of these values.

Metric

Thread
Code
Stud Material
Code
Max. Nut Tightening
Torque (n-m)2
Test SheetInstallation
(kn)
Push-out
(n)
Torque-out
(n-m)
Pull-thru
(n)
MaterialThickness
(mm)
Hardness
(HRB)
M2.5ST0.41Aluminum1.6298.94651.02600
Carbon Steel1.55911.17401.02800
SS0.41Aluminum1.62911.64650.81820
Carbon Steel1.55913.87400.81820
M3ST0.74Aluminum1.62912.96001.73150
Carbon Steel1.55914.78201.73840
SS0.74Aluminum1.62912.96001.32570
Carbon Steel1.55914.78201.32440
M3.5ST1.15Aluminum1.62915.68001.73780
Carbon Steel1.55922.313352.83780
SS1.15Aluminum1.62915.68001.73445
Carbon Steel1.55922.313352.03445
M4ST1.70Aluminum1.62920.09752.94448
Carbon Steel1.55928.917804.25650
SS1.70Aluminum1.62922.39752.94180
Carbon Steel1.55926.717802.94775
M5ST3.50Aluminum1.62924.510703.55170
Carbon Steel1.55933.420006.56270
SS3.50Aluminum1.62924.510703.54760
Carbon Steel1.55932.520006.36000
M6ST5.90Aluminum2.42828.916607.310200
Carbon Steel2.24644.5256011.311300
SS5.90Aluminum2.42828.916607.39090
Carbon Steel2.24644.5256010.110600
M8ST14.2Aluminum2.42829.8191011.310500
Carbon Steel2.44644.5289019.215450
SS14.2Aluminum2.42829.8191011.39540
Carbon Steel2.44649.8289017.513630
(1) Performance data represents the average destructive result 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.
(2) Maximum recommended tightening torques for studs with material code AL are 60 percent of these values.

Performance – Material Codes S4 & SP

Inch

Thread
Code
Stud Material CodeMax. Nut Tightening
Torque (in-lbs)
Test SheetInstallation
(lbs)s
Push-out
(lbs)
Torque-out
(in-lbs)
Pull-thru
(lbs)
MaterialThickness
(in)
Max. Hardness (HRB)
440S46.0Stainless Steel.06092900045016.0800
SP6.0Stainless Steel.04592900052010.6605
632S411Stainless Steel.06092950054027.01350
SP11Stainless Steel.04592950067019.5940
832S421Stainless Steel.060921120078058.01800
SP21Stainless Steel.045921120078537.51415
1032S433Stainless Steel.0609212000105095.02250
SP33Stainless Steel.045921200092059.51500
2520S470Stainless Steel.060922300016001563900
(1) Performance data represents the average destructive result 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.

Metric

Thread
Code
Stud Material
Code
Max. Nut Tightening
Torque (in-lbs)
Test SheetInstallation
(kn)
Push-out
(n)
Torque-out
(n-m)
Pull-thru
(n)
MaterialThickness
(mm)
Max. Hardness (HRB)
M3S40.9Stainless Steel1.50924022201.803500
M4S42.1Stainless Steel1.50925032106.508000
SP2.1Stainless Steel1.14925030003.906000
M5S44.3Stainless Steel1.509253357510.710000
SP4.3Stainless Steel1.14925338907.357320
M6S47.2Stainless Steel1.509271420015.914900
(1) Performance data represents the average destructive result 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.

Options

Thread Locking Element

A nylon thread locking element can be applied to the stud threads to prevent loosening due to vibration. To specify, insert PATCH at the end of the part description. Other locking elements such as micro – encapsulated epoxy available by request.
Ex. SBST–632–1.250–PATCH

sb-options-locking

Anti–Cross Thread Feature

PENCOM can provide most studs with the MAThread® Anti–Cross Thread Technology. This patented unique thread design significantly reduces or eliminates thread assembly damage while improving assembly times.Contact your PENCOM Account Representative for ordering information.

sb-options-anti-cross1When the misaligned threads contact, the MAThread® ball bearing–shaped lead threads reduce friction with internal threads and prevent jamming.
sb-options-anti-cross2The threads actively force themselves into alignment with little resistance improving assembly times and reducing operator fatigue.

MAThread is a registered trademark of MAThread, Inc.

sb-options-anti-cross

Thread Lubricating and Masking

Studs can be supplied with a variety of thread lubricating and masking materials. Available coatings reduce friction, heat buildup and galling during installation and prevent paint, weld spatter and electro– deposited undercoatings from adhering to stud threads. Contact a PENCOM Account Representative to discuss your application.

sb-options-lubricating

Dog Point

A dog point lead–in improves location of the mating fastener and protects the beginning threads during engagement. To specify, insert DOG at the end of the part description.
Ex. SBST– 632–1.250–DOG

sb-dog-point-tech

sb-dog-point

Inch

Thread
Code
C
±.0052
E
±.010
B Nom. Transitional
Length to Full Thread
632.086.050.098
832.111.055.099
1024.124.065.127
1032.138.065.098
2520.173.085.149
3118.228.105.164
(1)For "L" refer to stud length tables.
(2)Maximum dog point diameter is .003" lessthan minimum minor diameter of 2B nut threads.

Metric

thread
Code
C
±0.132
E
±0.25
B Nom. Transitional
Length to Full Thread
M3.52.401.271.88
M42.791.402.26
M53.661.782.48
M64.372.033.05
M86.052.673.73
(1)For "L" refer to stud length tables.
(2)Maximum dog point diameter is 0.08 mm less than minimum minor diameter of 6H nut threads.