M3
Heatsink
Spring
Screws,
21mm
Overall
Length,
7mm
Thread,
Cross
Recessed
|
Customizable
High-performance
M3
heatsink
spring
screws,
21mm
overall
length
&
7mm
thread.
Features
phosphating
surface
treatment,
ensures
perfect
mounting
pressure
&
thermal
conductivity.
Custom
specs
available.
Our
premium
Heatsink
Spring
Screws
are
engineered
to
provide
consistent
and
reliable
clamping
force
for
critical
thermal
management
applications.
The
integrated
spring
mechanism
compensates
for
material
expansion/contraction
and
component
height
tolerances,
ensuring
optimal
contact
pressure
between
the
heatsink
and
the
component
(e.g.,
CPU,
GPU,
power
ICs)
over
a
wide
temperature
range.
This
guarantees
superior
thermal
conductivity,
long-term
stability,
and
prevents
damage
to
sensitive
electronics
from
over-torquing.
Technical
Specifications
|
Total
Length
|
21.0
mm
(±0.1mm)
|
|
Thread
Length
|
7.0
mm
(±0.1mm)
|
|
Thread
Diameter
|
M3
(Metric)
|
|
Drive
Type
|
Cross
Recessed
(Phillips
#1)
|
|
Head
Style
|
Pan
Head
|
|
Material
|
High-Carbon
Steel
(Grade
4.8
or
8.8
available)
|
|
Spring
Material
|
Stainless
Steel
(Grade
304)
|
|
Surface
Treatment
|
Zinc
Phosphate
Coating
(Phosphating)
|
|
Customization
|
Various
lengths,
materials
(e.g.,
SS410),
plating
(e.g.,
Zinc,
Ni),
drive
types
(Pozidriv,
Torx)
|
Primary
Uses
&
Applications
These
screws
are
specifically
designed
for
the
assembly
of
cooling
solutions
in
electronic
devices
where
precise
and
maintained
pressure
is
paramount.
Typical
applications
include:
-
Computer
Hardware:
Securing
CPU
coolers,
GPU
coolers,
VRM
heatsinks,
and
chipset
coolers
to
motherboards
and
PCBs.
-
Power
Electronics:
Mounting
heatsinks
on
power
transistors,
MOSFETs,
IGBT
modules,
and
voltage
regulators
in
power
supplies
and
inverters.
-
LED
Lighting:
Assembling
high-power
LED
arrays
and
modules
where
efficient
heat
dissipation
is
critical
for
longevity.
-
Telecommunications
&
Server
Equipment:
Fastening
heatsinks
in
routers,
switches,
and
server
blades.
-
General
Electronics:
Any
application
requiring
a
sprung
load
to
compensate
for
tolerance
stacks
and
ensure
even
thermal
interface
material
(TIM)
spread.
How
to
Use
-
Preparation:
Ensure
the
motherboard
or
PCB
has
pre-installed
brass
standoffs
(or
threaded
inserts)
with
M3
threading
matching
the
screw's
specification.
-
Alignment:
Place
the
heatsink
onto
the
component,
aligning
the
mounting
holes
of
the
heatsink
with
the
threaded
standoffs
on
the
PCB.
-
Screw
Placement:
Insert
the
spring
screw
through
the
washer
(if
applicable),
then
through
the
heatsink's
mounting
hole.
-
Initial
Threading:
Manually
start
threading
the
screw
into
the
standoff
to
avoid
cross-threading.
-
Tightening:
Using
a
#
Phillips
screwdriver,
tighten
the
screw
until
the
spring
is
partially
compressed.
Crucially,
do
not
overtighten.
The
goal
is
to
compress
the
spring
to
apply
the
correct
force,
not
to
drive
the
screw
until
it
stops.
-
Pattern:
Follow
a
cross
or
star
pattern
(e.g.,
tighten
screws
diagonally)
when
installing
multiple
screws
to
ensure
even
pressure
distribution
and
avoid
warping
the
heatsink
or
PCB.
-
Final
Check:
Ensure
all
springs
are
evenly
compressed
and
the
heatsink
is
firmly
seated
without
any
wobble.
Our
Advantages
-
More
than
20
years
of
screw
production
experience
and
non-standard
screw
custom
development
experience,
provide
you
with
cost-effective
screws,
and
help
you
solve
the
fastener
supply
chain.
-
Precise
production
equipment.
The
company
introduces
all
imported
equipment
from
Taiwan
to
produce
precision
screws
and
hardware
accessories
for
you.
Provide
free
sample
testing
for
compatibility
verification.
-
A
complete
management
system,
each
batch
of
products
that
leave
the
factory
undergoes
multiple
strict
monitoring
-
Dedicated
account
management
for
seamless
collaboration.
System-supporting
services
guarantee
you
peace
of
mind.
Support
and
Services
If
you
require
technical
support
or
have
any
questions
regarding
our
Spring
Screws
product,
our
team
of
knowledgeable
professionals
is
here
to
assist
you.
We
provide
comprehensive
support
services
for
all
aspects
of
our
Spring
Screws.
From
selection
advice
to
ensure
you
have
the
right
type
and
size
for
your
project,
to
guidance
on
proper
installation
techniques,
we've
got
you
covered.
Our
support
services
include
detailed
product
specifications,
material
safety
data
sheets,
and
step-by-step
installation
guides.
We
also
offer
troubleshooting
assistance
for
any
issues
that
may
arise
during
the
use
of
our
Spring
Screws.
Whether
you're
a
seasoned
professional
or
a
DIY
enthusiast,
we're
committed
to
providing
the
support
you
need
to
ensure
your
project's
success.
For
maintenance
tips
and
best
practices,
our
experts
are
on
hand
with
valuable
advice
to
extend
the
life
and
maintain
the
performance
of
our
Spring
Screws.
We
are
dedicated
to
providing
exceptional
customer
support
and
ensuring
that
our
products
meet
the
highest
standards
of
quality
and
reliability.
Packing
and
Shipping
Our
Spring
Screws
are
packaged
with
care
to
ensure
they
arrive
at
your
location
in
perfect
condition.
Each
pack
contains
a
specific
number
of
rivets,
securely
held
within
a
durable,
moisture-resistant
plastic
bag.
This
bag
is
then
placed
inside
a
sturdy
cardboard
box,
cushioned
with
packing
materials
to
prevent
any
movement
during
transit.
The
boxes
are
sealed
and
labeled
with
product
information,
including
the
quantity
and
size
of
the
rivets,
for
easy
identification.
For
larger
or
bulk
orders,
multiple
boxes
are
placed
onto
a
pallet,
shrink-wrapped,
and
strapped
securely
to
minimize
the
risk
of
damage.
We
ship
our
Spring
Screws
using
reliable
courier
services
to
ensure
timely
and
safe
delivery.
Tracking
information
is
provided
for
every
shipment,
allowing
you
to
monitor
the
progress
of
your
order
until
it
reaches
your
doorstep.
Our
factory
is
able
to
accept
customized
drawings.
To
strike
a
balance
between
technical
details
and
customer-centric
messaging,
please
let
us
know
if
you
need
to
tweak
the
description
to
highlight
specific
certifications
or
other
parameters!
