472
Dimensions in millimeters (inch) unless otherwise stated
52-SM Captive Screws
Miniature series · Surface Mount Technology (SMT) Style
No. 2 Phillips /
Slot Combination
T15 TORX® /
Slot Combination
Ø E
Standoff
Spring
Screw
Ø J
C
G
Ø B
Ø B
Screw Height and Screw Projection PC Board Preparation
Recess Styles
* Value represents float in unfastened position
Notes: P-1, P-2 Screw Projection measured from the top side
of panel
52 Captive Screws
Minature Series - SMT Style
Part Number
Specify Package
Indicate package option with last digit
of the part number
Example
52-SM-1311-K-R: Reel Package (as shown in table)
52-SM-1311-K-T: Tray Package
• For installation to PC
Board material utilizing
surface mount
technology
• Smaller footprint for
limited space
applications
• Heat treated steel screw
for optimum strength
Material and Finish
Screw: Hardened carbon steel,
zinc plated, chromate, plus sealer
Internal spring: 300 series stainless
steel, passivated
Standoff: Steel, Tin plated
Plug: Silicone rubber
Installation Notes
Visit www.southco.com for
additional installation guidelines
To ensure you receive
SOUTHCO® quality parts,
look for the segmented circle.
Part Number
See table
P-1
H-1
F*
(Total float
of screw in
standoff)
Fastened
Unfastened
P-2
H-2
www.southco.com/52
ACTUAL SIZE
TORX is a registered trademark of ACUMENT ® Intellectual Properties, LLC
Thread
Size
Part Number (Reel package shown)
H-1 H-2 P-1 P-2
Ø B
Knurled
Head
Ø B
Smooth
Head
Ø J Ø E C G F* Ø K Ø N
Panel
Preparation
Ø D
Knurled Head Smooth Head
Phillips / Slotted TORX®/Slotted Phillips / Slotted TORX®/Slotted
M3 x
0.5
52-SM-3311-K-R 52-SM-3411-K-R 52-SM-3311-N-R 52-SM-3411-N-R 14
(.55)
9.6
(.38)
0.8 (.03) 5.3 (.21) 7
(.28)
6.8
(.27)
5.5
(.217)
7.6
(.30)
7
(.28)
2.5
(.1)
0.5
(.02) 5.6
(.22)
8.6
(.34)
5.6 +0.08/-0
(.220 +.003/-.000)
52-SM-3321-K-R 52-SM-3421-K-R 52-SM-3321-N-R 52-SM-3421-N-R 2.3 (.09) 6.8 (.27)
4-40 52-SM-1311-K-R 52-SM-1411-K-R 52-SM-1311-N-R 52-SM-1411-N-R 14
(.55)
9.6
(.38)
0.8 (.03) 5.3 (.21) 7
(.28)
6.8
(.27)
5.5
(.217)
7.6
(.30)
7
(.28)
2.5
(.1)
0.5
(.02)
5.6 +0.08/-0
(.220 +.003/-.000)
52-SM-1321-K-R 52-SM-1421-K-R 52-SM-1321-N-R 52-SM-1421-N-R 2.3 (.09) 6.8 (.27)
6-32 52-SM-2311-K-R 52-SM-2411-K-R 52-SM-2311-N-R 52-SM-2411-N-R 15.7
(.62)
10.7
(.42)
0.7 (.028) 5.8 (.23) 7.9
(.31)
7.6
(.30)
6.2
(.244)
8.1
(.32)
8.1
(.32)
2.5
(.1)
0.8
(.03)
6.4
(.25)
10.2
(.40)
6.4 +0.08/-0
(.252 +.003/-.000)
52-SM-2321-K-R 52-SM-2421-K-R 52-SM-2321-N-R 52-SM-2421-N-R 2.2 (.087) 7.4 (.29)
Screw Spring
Plug
Standoff
1.5 (.063) Min. Ø D
Ø N
Ø 7.9 (0.31)
Ø 7.62 (0.30)
Ø K
15.7 (0.62)
10.6
(0.42)
P-1
P-2
Soldering Pad
Soldering pad surface area
PC Board
Packed with Plug
Polyimide tape patch
on top surface of screw
for vacuum pick up
Screw as Shipped in Reel Pack or Tray Pack
Other options available. For complete details
on variety, part numbers, installation and
specification, go to
473
Dimensions in millimeters (inch) unless otherwise stated
Installation Guidelines
SMT product installation is offered on these Southco Captive Screws for 4-40, 6-32 and M3 thread sizes:
• 47 Styled Knob Series
• 4C Prism Series
• 52 Miniature Series
Installation Features
Each Southco SMT style captive screw includes a polymide patch
covering the screw head tool recess allowing for vacuum pick up during
placement on the PC Board. The screw threads are protected from
excess solder during the reflow process by a plug pre-assembled to
the screw by Southco. The patch and plug are then removed after the
final cool down phase.
Screw as Shipped in Reel or Tray Pack
Preparing the PC Board to accept SMT Captive Screws
• See literature for optimum soldering pad surface area for the
specific Southco Captive Screw being utilized
Packaging Features/Options
• Tray Pack
• Reel Pack
Reflow Process
• Reflow of Solder
- Pre-heat
- Soak
- Reflow
- Cooling
• Cleaning
- Remove excess solder paste
Southco Surface Mounted Technology (SMT) Captive Screws include installation and packaging
features for installation onto PC Boards during the Reflow Process as a surface mounted device (SMD).
Tray Pack Reel Pack
Packed with Plug
Polyimide tape patch
on top surface of screw
for vacuum pick up
H-2 P-2
Screw
Knob
Ferrule
Ø E
Ø J
H-1
P-1
F* Total Float of
Screw in Ferrule
Soldering Pad
PC Board
474
Dimensions in millimeters (inch) unless otherwise stated
52 Captive Screws
Miniature series · Flare-in style
Recess Styles
H-1
P-1
F*
(Total float
of screw in
standoff)
P-2
H-2
Fastened
Unfastened
H* - Value represents float in unfastened position
Notes: P-1, P-2 measured from the top side of panel
90˚
Panel thickness
Ø D
0.4±0.1
(.016±.005)
Ø Z
45˚
Smooth face punch
(Ø > screw head)
Installation tool
(see table)
Note: Subtract .25 (.01) from Ø B for smooth head style.
Knob Height and Screw Projection
• Smaller footprint for
limited space
applications
• Heat treated steel screw
for optimum strength
Material and Finish
Screw: Hardened carbon steel,
zinc plated, chromate, plus sealer
Spring: 300 series stainless steel,
passivated
Standoff: Aluminum natural
Installation tool: Hardened carbon
steel, zinc plated, chromate, plus
sealer
Installation Notes
1. Prepare panel as shown
2. Use light pressure to flare
standoff, assuring parallel
surfaces on the punch and
installation tool
Ø E
Standoff
Spring
Screw
7
Ø J
Ø BØ BL
TORX
®
/ Slot
combination
Phillips / Slot
combination
Phillips / Slot Recess
No. 2 Phillips T15
TORX
®
(M3,4-40,6-32)
T25
TORX
®
(M4)
G
Thread
Size
Panel
Thickness
Part Number
Ø B Ø E F G H-1 H-2 Ø J LP-1 P-2
Panel Preparation Tool
Part
No.
Knurled Head Smooth Head
Ø D Ø Z
Min. Max. Phillips /
Slotted
TORX®/
Slotted
Phillips /
Slotted
TORX®/
Slotted
4-40 0.8
(.031)
2.4
(.094) 52-19-11-4 52-17-11-4 52-1A-11-4 52-18-11-4 7
(.28)
6.2
(.245)
0.5
(.018)
2.5
(.1)
14
(.55)
9.6
(.38)
4.6
(.183)
1
(.041)
0.8
(.031)
5.3
(.21)
4.75
(.187 )
3
(.120) 47-104
6-32 1.5
(.058)
3.2
(.125) 52-29-21-4 52-27-21-4 52-2A-21-4 52-28-21-4 8
(.31)
7
(.28)
0.7
(.028)
2.5
(.1)
15
(.59)
9.6
(.38)
5.3
(.209)
1.8
(.07)
1.8
(.07)
6.8
(.27)
5.41
(.213 )
3.6
(.141) 47-106
M3 x
0.5
0.8
(.031)
2.4
(.094) 52-39-11-4 52-37-11-4 52-3A-11-4 52-38-11-4 7
(.28)
6.2
(.245)
0.6
(.023)
2.5
(.1)
14
(.55)
9.6
(.38)
4.6
(.183)
1
(.041)
0.8
(.031)
5.3
(.21)
4.75
(.187 )
3
(.120) 47-104
M4 x
0.7
1.5
(.058)
3.2
(.125) 52-49-21-4 52-47-21-4 52-4A-21-4 52-48-21-4 9.4
(.37)
8.7
(.34)
0.7
(.028)
3
(.12)
15.2
(.60)
10.1
(.40)
6.7
(.26)
1.8
(.07)
1.8
(.07)
6.8
(.27)
6.76
(.266 )
4.2
(.166) 47-108
ACTUAL SIZE
www.southco.com/52
+0.1
-0.04
+.005
-0
+0.08
-0
+.003
-0
+0.08
-0
+.003
-0
+0.08
-0
+.003
-0
TORX is a registered trademark of ACUMENT ® Intellectual Properties, LLC
Part Number
See table
475
Dimensions in millimeters (inch) unless otherwise stated
52 Captive Screws
Miniature series · Press-in style
G
Phillips / Slot Recess
No. 2 Phillips T15 TORX® (M3,4-40,6-32)
T25 TORX® (M4)
Phillips / Slot
combination
TORX® / Slot
combination
Ø E
Standoff
Spring
Screw
Ø J
C
G
Ø B
Ø B
Knob Height and Screw Projection
Recess Styles
* Value represents float in unfastened position
Notes: P-1, P-2 measured from the top side of panel
Thread
Size
Part Number
Ø B CØ E F* GH-1 H-2 Ø J P-1 P-2
Panel Preparation
Knurled Head Smooth Head
Ø D Ø Z
Phillips /
Slotted
TORX® /
Slotted
Phillips /
Slotted
TORX® /
Slotted
4-40 52-19-51-4 52-17-51-4 52-1A-51-4 52-18-51-4 7
(.28)
7.9
(.31)
6.4
(.25)
0.5
(.018)
2.5
(.1)
14
(.55)
9.6
(.38)
5.5
(.217)
0.9 (.036) 5.3 (.21) 5.56
(.219 )
3
(.120)
52-19-53-4 52-17-53-4 52-1A-53-4 52-18-53-4 2.5 (.1) 6.8 (.27)
6-32 52-29-51-4 52-27-51-4 52-2A-51-4 52-28-51-4 8
(.31)
8.6
(.34)
7
(.28)
0.7
(.028)
2.5
(.1)
15.5
(.61)
10.4
(.41)
6.3
(.247)
0.9 (.036) 6.1 (.24) 6.35
(.250 )
3.7
(.144)
52-29-53-4 52-27-53-4 52-2A-53-4 52-28-53-4 2.5 (.1) 7.6 (.30)
M3 X
0.5
52-39-51-4 52-37-51-4 52-3A-51-4 52-38-51-4 7
(.28)
7.9
(.31)
6.4
(.25)
0.6
(.023)
2.5
(.1)
14
(.55)
9.6
(.38)
5.5
(.217)
0.9 (.036) 5.3 (.21) 5.56
(.219 )
3.2
(.126)
52-39-53-4 52-37-53-4 52-3A-53-4 52-38-53-4 2.5 (.1) 6.8 (.27)
M4 X
0.7
52-49-51-4 52-47-51-4 52-4A-51-4 52-48-51-4 9.4
(.37)
8.6
(.34)
8.7
(.34)
0.7
(.028)
3
(.12)
16
(.63)
10.8
(.43)
7.9
(.31)
0.9 (.036) 6.1 (.24) 8
(.315 )
4.4
(.173)
52-49-53-4 52-47-53-4 52-4A-53-4 52-48-53-4 2.5 (.1) 7.6 (.30)
• Smaller footprint for
limited space
applications
• Heat treated steel screw
for optimum strength
Material and Finish
Screw: Hardened carbon steel,
zinc plated, chromate, plus sealer
Spring: 300 series stainless steel,
passivated
Standoff: Carbon steel, zinc plated,
chromate, plus sealer
Installation Notes
For use in most aluminum or in low
carbon steels that are 1/4 hard or
softer
Min.
panel
thickness
Ø
D
0.9
(.036)
Do not
chamfer
Back-up
tool
(not supplied)
Smooth face punch
(Ø > screw head)
Ø
Z
Top side
of panel
Notes: Recommended minimum distance from edge of panel
to centerline of hole is 1.5 x Ø D for press-in version.
P-1
H-1
F*
(Total float
of screw in
standoff)
Fastened
Unfastened
P-2
H-2
www.southco.com/52
ACTUAL SIZE
+0
-0.08
+0.08
-0
+0.08
-0
+0.08
-0
+0
-.003
+.003
-0
+.003
-0
+.003
-0
See page 543 for additional installation guidelines
TORX is a registered trademark of ACUMENT ® Intellectual Properties, LLC
Part Number
See table
476
Dimensions in millimeters (inch) unless otherwise stated
52 Overmold Captive Screws
Miniature series · Flare-in style
Recess Styles*
H-1
P-1
F*
(Total float
of screw in
standoff)
P-2
H-2
Fastened
Unfastened
F* - Value represents float in unfastened position
Notes: P-1, P-2 measured from the top side of panel
90˚
Panel thickness
Ø D
0.4±0.1
(.016±.005)
Ø Z
45˚
Smooth face punch
(Ø > screw head)
Installation tool
(see table)
*Part Numbers not available with combination head styles;
Phillips or TORX® only
Knob Height and Screw Projection
• Smaller footprint for
limited space applications
• Heat treated steel screw
for optimum strength
• Designate access points
with color
• Color match captive screws
to your industrial design
Material and Finish
Screw: Hardened carbon steel,
zinc plated, chromate, plus sealer
Spring: 300 series stainless steel,
passivated
Standoff: Aluminum natural
Knob: PC/ABS
Installation tool: Hardened carbon
steel, zinc plated, chromate, plus
sealer
Performance Details
Flamability Rating: UL94-VO
Installation Notes
1. Prepare panel as shown
2. Use light pressure to flare
standoff, assuring parallel
surfaces on the punch and
installation tool
Part Number
See table
Ø E
Standoff
Spring
Screw
Knob
Ø J
7.1
(.28)
Ø BØ BL
TORX® / Slot
combination
Phillips / Slot
combination
Phillips / Slot Recess
No. 2 Phillips
T15
TORX®
(M3,4-40,6-32)
T25
TORX®
(M4)
G
ACTUAL SIZE
www.southco.com/52
Thread
Size
Panel
Thickness
Part Number B
Knurled
Head
B
Smooth
Head
Ø E F G H-1 H-2 Ø J LP-1 P-2
Panel
Preparation Tool
Part
No.
Knurled Head Smooth Head
Ø D Ø Z
Min. Max. Phillips /
Slotted
TORX®/
Slotted
Phillips /
Slotted
TORX®/
Slotted
4-40 0.8
(.031)
2.4
(.094) 52-11-11-4-000 * 52-15-11-4-000 * 52-13-11-4-000 * 52-16-11-4-000 * 8.1
(.32)
7.8
(.31)
6.2
(.245)
0.5
(.018)
2.5
(.1)
14
(.55)
9.6
(.38)
4.6
(.183)
1
(.041)
0.8
(.031)
5.3
(.21)
4.75
(.187 )
3
(.120) 47-104
6-32 1.5
(.058)
3.2
(.125) 52-29-21-4-000 52-27-21-4-000 52-2A-21-4-000 52-28-21-4-000 8.8
(.35)
8.5
(.33)
7
(.28)
0.7
(.028)
2.5
(.1)
15
(.59)
9.6
(.38)
5.3
(.209)
1.8
(.07)
1.8
(.07)
6.8
(.27)
5.41
(.213 )
3.6
(.141) 47-106
M3 x
0.5
0.8
(.031)
2.4
(.094) 52-31-11-4-000 * 52-35-11-4-000* 52-33-11-4-000 * 52-36-11-4-000* 8.1
(.32)
7.8
(.31)
6.2
(.245)
0.6
(.023)
2.5
(.1)
14
(.55)
9.6
(.38)
4.6
(.183)
1
(.041)
0.8
(.031)
5.3
(.21)
4.75
(.187 )
3
(.120) 47-104
M4 x
0.7
1.5
(.058)
3.2
(.125) 52-49-21-4-000 52-45-21-4-000 * 52-4A-21-4-000 52-46-21-4-000 * 10.3
(.41)
10
(.39)
8.7
(.34)
0.7
(.028)
3
(.12)
15.2
(.60)
10
(.40)
6.7
(.26)
1.8
(.07)
1.8
(.07)
6.8
(.27)
6.76
(.266 )
4.2
(.166) 47-108
+0.1
-0
+.005
-0
+0.08
-0
+.003
-0
+0.08
-0
+.003
-0
+0.08
-0
+.003
-0
Specifying Color: To indicate color, change the last three
digits of the part number
Example: 52-11-11-4-000 Black, 52-11-11-4-013 Red
000 Black
(shown in table)
008 Blue 013 Red
014 Green Your color
contact Southco
TORX is a registered trademark of ACUMENT ® Intellectual Properties, LLC
477
Dimensions in millimeters (inch) unless otherwise stated
Specifying Color: To indicate color, change the last three
digits of the part number
Example: 52-11-11-4-000 Black, 52-11-11-4-013 Red
000 Black
(shown in table)
008 Blue 013 Red
014 Green Your color
contact Southco
52 Overmold Captive Screws
Miniature series · Press-in style
Knob Height and Screw Projection
Recess Styles*
F* Value represents float in unfastened position
Notes: P-1, P-2 measured from the top side of panel
Note:*Part Numbers not available with combination head
styles; Phillips or TORX® only
Ø E
Standoff
Spring
Screw
Knob
Ø J
Ø BØ B
TORX® / Slot
combination
Phillips / Slot
combination
Phillips / Slot Recess
No. 2 Phillips T15
TORX®
(M3,4-40,6-32)
T25
TORX®
(M4)
GC
• Smaller footprint for
limited space
applications
• Heat treated steel screw
for optimum strength
• Designate access points
with color
• Color match captive screws
to your industrial design
Material and Finish
Screw: Hardened carbon steel,
zinc plated, chromate, plus sealer
Spring: 300 series stainless steel,
passivated
Standoff: Carbon steel, zinc plated,
chromate, plus sealer
Knob: PC/ABS
Performance Details
Flamability Rating: UL94-VO
Installation Notes
For use in most aluminum or in low
carbon steels that are 1/4 hard or
softer. Visit www.southco.com for
more information.
Part Number
See table
Min.
panel
thickness
Ø
D
0.9
Do not
chamfer
Back-up
tool
(not supplied)
Smooth face punch
(Ø > screw head)
Ø
Z
Top side
of panel
Notes: Recommended minimum distance from edge of panel
to centerline of hole is 1.5 x Ø D for press-in version.
P-1
H-1
F*
(Total float
of screw in
standoff)
Fastened
Unfastened
P-2
H-2
www.southco.com/52
ACTUAL SIZE
Visit www.southco.com for additional installation guidelines
TORX is a registered trademark of ACUMENT ® Intellectual Properties, LLC
Thread
Size
Part Number B
Knurled
Head
B
Smooth
Head
CØ E F* GH-1 H-2 Ø J P-1 P-2
Panel Preparation
Knurled Head Smooth Head
Ø D Ø Z
Phillips /
Slotted
TORX® /
Slotted
Phillips /
Slotted
TORX® /
Slotted
4-40 52-11-51-4-000* 52-15-51-4-000* 52-13-51-4-000* 52-16-51-4-000* 8.1
(.32)
7.8
(.31)
7.9
(.31)
6.4
(.25)
0.5
(.018)
2.5
(.1)
14
(.55)
9.6
(.38)
5.5
(.217)
0.9 (.036) 5.3 (.21) 5.56
(.219 )
3
(.120)
52-11-53-4-000* 52-15-53-4-000* 52-13-53-4-000* 52-16-53-4-000* 2.5 (.1) 6.8 (.27)
6-32 52-29-51-4-000 52-27-51-4-000 52-2A-51-4-000 52-28-51-4-000 8.8
(.35)
8.5
(.33)
8.6
(.34)
7
(.28)
0.7
(.028)
2.5
(.1)
15.5
(.61)
10.4
(.41)
6.3
(.247)
0.9 (.036) 6.1 (.24) 6.35
(.250 )
3.7
(.144)
52-29-53-4-000 52-27-53-4-000 52-2A-53-4-000 52-28-53-4-000 2.5 (.1) 7.6 (.30)
M3 X
0.5
52-31-51-4-000* 52-35-51-4-000* 52-33-51-4-000* 52-36-51-4-000* 8.1
(.32)
7.8
(.31)
7.9
(.31)
6.4
(.25)
0.6
(.023)
2.5
(.1)
14
(.55)
9.6
(.38)
5.5
(.217)
0.9 (.036) 5.3 (.21) 5.56
(.219 )
3.2
(.126)
52-31-53-4-000* 52-35-53-4-000* 52-33-53-4-000* 52-36-53-4-000* 2.5 (.1) 6.8 (.27)
M4 X
0.7
52-49-51-4-000 52-45-51-4-000* 52-4A-51-4-000 52-46-51-4-000* 10.3
(.41)
10
(.39)
8.6
(.34)
8.7
(.34)
0.7
(.028)
3
(.12)
16
(.63)
10.8
(.43)
7.9
(.31)
0.9 (.036) 6.1 (.24) 8
(.315 ) 4.4 (.173)
52-49-53-4-000 52-45-53-4-000* 52-4A-53-4-000 52-46-53-4-000* 2.5 (.1) 7.7 (.30)
+0
-0.08
+0.08
-0
+0.03
-0.00
+0.08
-0
+0
-.003
+0
-.003
+0
-.003
+.003
- .000
543
Installation Guidelinesfor SOUTHCO® Self-Clinching products
Self-clinching product installation is offered on these
SOUTHCO® products, making them easy-to-use captive
panel fasteners:
When pressed into a properly prepared hole, self-clinching captive
fasteners cold-flow (move) the panel material into the retaining groove of
the fastener. This material then retains the fastener in the panel.
Panel edge
Before installation Correct installation
Over installation
Mounting hole
diameter Panel
1.5 x Ø Min. Centerline of mounting hole
Ferrule Rollover
Ferrule Ferrule
Ferrule
Panel
Panel
Area of material
that moves into
groove
Mounting hole
Die side
of panel
Material
thickness
Punch side
of panel
Panel
This area of material
has separated from
the rest of the panel
Successful press-in installations depend on:
Material:
The hardness of the panel material must not exceed SOUTHCO®
recommendations. If the panel is too hard, the fastener will not install
correctly.
Installation Holes:
Mounting holes may be drilled, punched, or cast.
• Holeedge:thetopholeedgemust
be sharp but with no broken edges.
Do not chamfer or debur edge.
•Punchedholes:useapunchanddie
with a small clearance to minimize
the rollover and fracture angle.
•Holediameter:measurethehole
diameter at the panel surface on
the side on which the fastener will
be installed. The diameter must be
within SOUTHCO® specifications for
that product.
- If the hole is too large, not
enough material will flow into the
retaining groove and the fastener may not be retained adequately.
- If the hole is too small, the fastener will not fit and installation may
become difficult and unsafe.
• Holedistancefromtheedgeofpanel:theminimumrecommended
distance is 1.5 x the diameter of the mounting hole, unless
otherwise indicated.
• Captive Screws
• Receptacles for Quarter-turn Fasteners
• Receptacles for Fast-lead Thread Screws
• Spring-loaded Plungers
• Captive Nuts
• Threaded Inserts
- Installing too close to the edge will cause the material to flow in the
opposite direction, deforming the edge of the panel. To install closer
to the edge, you may need to restrain the panel edge.
Panel edge
Before installation Correct installation Over installation
Mounting hole
diameter Panel
1.5 x Ø Min. Centerline of mounting hole
Ferrule Rollover
Ferrule Ferrule Ferrule
Panel
Panel
Area of material
that moves into
groove
Mounting hole
Die side
of panel
Material
thickness
Punch side
of panel
Panel
This area of material
has separated from
the rest of the panel
Panel Thickness:
The thickness of the panel at the mounting hole location must meet or
exceed Southco’s stated minimum recommendations.
If the material is too thin, panel deformation and/or damage to the
fastener may result.
Installation is fast and easy if you follow these tips:
How to install: Use the recommended force where noted and a proper
back-up tool.
- use any parallel-acting press
- use a punch whose diameter is larger than the head of the fastener
Installation Force: Proper installation requires an even distribution of
adequate force. It does not depend on the distance the fastener is pressed
into the panel.
- Southco does not recommend using a hammer. The impact force
does not provide an even distribution of force to allow the panel
material to completely flow into the fastener’s retaining groove.
- Installation force varies from application to application,
depending on the criteria noted above.
- On parts without a collar to provide a hard stop, press-in until the
edge of the knurl is just barely visible.
When to Install:
Installation is recommended after plating or finishing has been applied to
the panel.
The hole diameter must meet specifications
before finish or plating is applied.
- Do not over-install parts. This interupts
the material and will reduce the
retention strength.
Ferrule
Panel
Area of material
that moves into
groove
Mounting hole
Panel edge
Before installation Correct installation
Over installation
Mounting hole
diameter Panel
1.5 x Ø Min. Centerline of mounting hole
Ferrule Rollover
Ferrule Ferrule
Ferrule
Panel
Panel
Area of material
that moves into
groove
Mounting hole
Die side
of panel
Material
thickness
Punch side
of panel
Panel
This area of material
has separated from
the rest of the panel
Rollover
Die side
of panel
Material
thickness
Punch side
of panel