PEMSERT® Self-clinching Flush Fasteners
F4-714
Installs flush into stainless steel sheets
Type F4™ fasteners are ideal for flush applications where a stainless steel sheet requires loadbearing threads. The PEM® flush nut can be installed easily by squeezing it into a round hole
in metal sheets. When the fastener is properly installed, both the top and the bottom of the
sheet remain flat, enhancing the functional and cosmetic qualities of the entire assembly.
The hexagonal head along with the proven PEM self-clinching design ensures high axial and
torsional strength.
Profile for
-1 shank code.
A
H
NEW!
Inst
stainlalls into
ess st
eel
Profile for -2, -3, -4,
& -5 shank codes.
A
Features and Benefits
• Installs flush
• For use in stainless steel sheets up to
HRB 88 / HB 183
• Can be installed before bending sheet
C
C
Clinching profile may vary.
All dimensions are in inches.
UNIFIED
Thread
Size
.086-56
(#2-56)
.112-40
(#4-40)
.138-32
(#6-32)
.164-32
(#8-32)
.190-32
(#10-32)
.250-20
(1/4-20)
Type
Thread
Code
F4
256
F4
440
F4
632
F4
832
F4
032
F4
0420
Shank
Code
1
2
1
2
1
2
1
2
1
2
3
4
5
A
(Shank)
Max.
.060
.090
.060
.090
.060
.090
.060
.090
.060
.090
.120
.151
.182
Sheet
Thickness
.060-.090
.091 Min.
.060-.090
.091 Min.
.060-.090
.091 Min.
.060-.090
.091 Min.
.060-.090
.091 Min.
.125-.155
.156-.186
.187 Min.
Hole Size
In Sheet
+.003 -.000
C
Max.
H
Nom.
Min. Dist. Hole
C/LTo Edge
.172
.171
.188
.23
.172
.171
.188
.23
.213
.212
.250
.27
.290
.289
.312
.28
.312
.311
.343
.31
.344
.343
.375
.34
Hole Size
In Sheet
+0.08
C
Max.
H
Nom.
Min. Dist. Hole
C/LTo Edge
4.37
4.35
4.8
6
4.37
4.35
4.8
6
4.37
4.35
4.8
6
7.37
7.35
7.9
7.2
7.92
7.9
8.7
8
8.74
8.72
9.5
8.8
METRIC
All dimensions are in millimeters.
Thread
Size x
Pitch
Type
Thread
Code
M2 x 0.4
F4
M2
M2.5 x 0.45
F4
M2.5
M3 x 0.5
F4
M3
M4 x 0.7
F4
M4
M5 x 0.8
F4
M5
M6 x 1
F4
M6
Shank
Code
1
2
1
2
1
2
1
2
1
2
3
4
5
A
(Shank)
Max.
1.53
2.3
1.53
2.3
1.53
2.3
1.53
2.3
1.53
2.3
3.05
3.84
4.63
Threads: Internal, ASME B1.1, 2B / ASME B1.13M, 6H
Material: Heat treated 400 series stainless steel
Finish: Passivated and/or tested per ASTM A380
For use in: HRB 88 / HB 183 or less
HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.
Sheet
Thickness
1.53-2.3
2.32 Min.
1.53-2.3
2.32 Min.
1.53-2.3
2.32 Min.
1.53-2.3
2.32 Min.
1.53-2.3
2.32 Min.
3.18-3.94
3.96-4.72
4.75 Min.
Part Number Designation
F4–440–2
Type &
Material
Thread Size
Code
Length
Code
www.pemnet.com
PEMSERT® Self-clinching Flush Fasteners
Installs flush into stainless steel sheets
INSTALLATION
1. Prepare properly sized round mounting hole in sheet. Do not perform any secondary operations such as deburring.
2. Place shank end of fastener into mounting hole (preferably the punch side) as shown in the drawing.
3. With installation punch and anvil surfaces parallel, apply only enough squeezing force to embed the hexagonal head flush
into the sheet. The metal displaced by the head flows evenly and smoothly around the back-tapered shank of the fastener,
securely locking it into place with high pullout resistance while at the same time, the embedded hexagonal head provides
high torque resistance.
PEMSERTER® Installation Tooling
Thread
Code
Anvil Part
Number
256/M2/M2.5
8006193
440/M3
975200040
632
975200041
832/M4
975200042
032/M5
975200043
0420/M6
975200044
PUNCH
Punch Part
Number
975200048
ANVIL
Axial
Max. Screw
Test Sheet Material
ThreadShank
Tensile
Tightening
300
Series Stainless Steel
StrengthTorque (3)
CodeCode
Installation Pushout
(2)
(in.
lbs.)
(lbs.)
(lbs.)
(lbs.)
1
1301.50 7200 270
256
2
1
1652.50 7200 270
440
2
1
1903.50 7200 290
632
2
1
2305.25 9000 450
832
2
1
2807.50 9000 450
032
2
3
0420
41035 36 14000 1000
5
METRIC
UNIFIED
PERFORMANCE DATA(1)
Axial
Max. Screw
Test Sheet Material
ThreadShank
Tensile
Tightening
300
Series Stainless Steel
StrengthTorque (3)
CodeCode
Installation Pushout
(kN)
(2)
(N•m)
(kN)
(N)
1
0.570.16 32 1200
M2
2
1
0.680.23 32 1200
M2.5
2
1
0.850.36 32 1200
M3
2
1
10.58 40 2000
M4
2
1
1.30.88 40 2000
M5
2
3
M6
44.5 3.7 65 4500
5
(1) Installation values are for general reference only. Actual set up and installation should be performed using the visual indication
method described in this literature. Other performance values reported are averages when all proper installation parameters and
procedures are followed. Variations in mounting hole size, sheet material, and installation procedure may affect performance. Performance testing this product in your application is recommended. We will be happy to provide technical assistance and/or
samples for this purpose.
(2) Failure occurs in screw stripping using a 60 ksi screw and the shortest shank length fastener.
(3) Torque values shown will produce a preload of 70% of axial tensile strength with nut factor “k” equal to .2. Threads may strip or head of the F
nut may bend and/or fail if screw is over-torqued beyond these values or if actual k value is less than .2.
See PEM Bulletin F for flush fasteners in other materials.
Regulatory compliance information is available in Technical
Support section of our website.
© 2014 PennEngineering.
F4-2
Specifications subject to change without notice.
See our website for the most current version of this bulletin.
Technical support e-mail: [email protected]