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System
of
Measurement
Inch
Metric
Length
1
5
/
3
2
"
3
/
4
"
2
5
/
3
2
"
1
"
1
1
3
/
1
6
"
2
9
/
1
6
"
3
3
/
8
"
6
m
m
8
m
m
1
0
m
m
1
1
.
2
m
m
1
2
m
m
1
3
.
2
m
m
1
4
m
m
1
5
m
m
Thread
Size
See all
M8
Thread
Pitch
1
mm
1.25
mm
1.5
mm
2
mm
2.5
mm
3.6
mm
Fastener
Head
Type
12
-
Point
Flat
Headless
Hex
Oval
Rounded
Socket
Square
Thumb
T
-
Slot
Threading
Fully
Threaded
Partially
Threaded
Threaded
on
Both
Ends
Threaded
on
One
End
Material
Aluminum
Brass
Carbon
Fiber
Fiberglass
Iron
Plastic
Stainless
Steel
Steel
Titanium
Finish
B
l
a
c
k
O
x
i
d
e
C
a
d
m
i
u
m
P
l
a
t
e
d
C
o
r
r
o
s
i
o
n
-
R
e
s
i
s
t
a
n
t
C
o
a
t
e
d
D
y
e
d
G
a
l
v
a
n
i
z
e
d
N
e
o
p
r
e
n
e
C
o
a
t
e
d
N
y
l
o
n
C
o
a
t
e
d
P
a
s
s
i
v
a
t
e
d
P
h
o
s
p
h
a
t
e
C
o
a
t
e
d
P
o
w
d
e
r
C
o
a
t
e
d
P
V
C
C
o
a
t
e
d
R
u
b
b
e
r
C
o
a
t
e
d
T
i
n
P
l
a
t
e
d
T
i
n
Z
i
n
c
P
l
a
t
e
d
T
i
t
a
n
i
u
m
C
a
r
b
o
n
N
i
t
r
i
d
e
(
T
i
C
N
)
C
o
a
t
e
d
Drive
Style
External
12
-
Point
External
Hex
External
Square
Hex
Hex
with
Pilot
Recess
Phillips
Slotted
Spring
Plunger
Wrench
Tamper
-
Resistant
Hex
Tamper
-
Resistant
Torx
Torx
Wrench
Flats
Socket
Head
Profile
Low
Standard
Ultra
Low
Head
Height
2
.
6
m
m
2
.
7
m
m
2
.
8
m
m
2
.
9
m
m
3
.
8
m
m
4
m
m
4
.
3
m
m
4
.
3
9
m
m
4
.
4
m
m
4
.
5
m
m
4
.
5
5
m
m
4
.
6
m
m
4
.
6
5
m
m
4
.
8
m
m
4
.
8
8
m
m
Fastener
Strength
Grade/Class
ASTM
Grade
B7
ASTM
Grade
B8M
ISO
Class
8.8
ISO
Class
10.9
ISO
Class
12.9
SAE
Grade
2
Head
Diameter
1
0
m
m
1
3
m
m
1
4
m
m
1
4
.
5
m
m
1
5
.
8
m
m
1
6
m
m
1
6
.
5
m
m
1
7
.
3
0
m
m
1
7
.
7
3
m
m
1
7
.
8
m
m
1
7
.
9
0
m
m
1
7
.
9
1
m
m
1
8
m
m
1
9
m
m
2
0
m
m
Thread
Direction
Left
Hand
Right
Hand
Right
Hand
and
Left
Hand
Thread
Type
Metric
Metric
Ball
Metric
Rounded
Trapezoidal
Metric
Trapezoidal
UNC
Thread
Spacing
Coarse
Fine
Screw
Size
M8
Specifications
Met
ASME
Standard
ASTM
Standard
DIN
Standard
IEC
61340
-
5
-
1
ISO
Standard
Japanese
Industrial
Standard
(JIS)
SAE
Standard
Drive
Size
3/16"
2.5
mm
4
mm
5
mm
6
mm
10
mm
13
mm
No.
3
No.
4
T40
T45
Tensile
Strength
Less
than
10,000
psi
10,000
psi
to
19,999
psi
20,000
psi
to
29,999
psi
30,000
psi
to
99,999
psi
100,000
psi
or
greater
Not
Rated
Screw
Features
Flanged
Sealing
Vented
With
Washer
Color
Beige
Black
Blue
Clear
Off
-
White
Pink
Red
Silver
White
Head
Width
8
mm
10
mm
12
mm
13
mm
20.6
mm
20.61
mm
27.5
mm
29
mm
31
mm
33
mm
38
mm
39
mm
45
mm
51
mm
Forward
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2,977 Products
Fastening and Joining
Socket
Head
Screws
With
a
deeper
drive
than
flat
and
rounded
head
screws,
these
withstand
more
torque
for
a
tighter
hold
357 products
Hex
Head
Screws
Used
with
nuts
to
create
a
stronger
joint
than
flat
and
rounded
screws
422 products
Rounded
Head
Screws
Sit
just
above
the
surface
for
a
low
-
profile
finish
and
hold
tighter
than
flat
head
screws
278 products
Flat
Head
Screws
Fit
in
countersunk
holes
for
a
flush
finish
215 products
Shoulder
Screws
Rotate
parts
around
the
cylinder
under
the
head
to
guide
and
align
them
during
installation
317 products
Set
Screws
Exert
pressure
at
the
tip
to
hold
parts
in
place,
unlike
screws
that
hold
material
together
with
threads
240 products
Thumb
Screws
Tighten
and
loosen
by
hand
without
the
need
for
tools
53 products
Carriage
Bolts
A
smooth
head
provides
a
finished
look
while
a
square
neck
keeps
the
bolt
in
place
when
using
a
nut
27 products
12
-
Point
Screws
12
contact
points
handle
more
torque
than
a
hex
head
while
a
flange
eliminates
the
need
for
a
washer
5 products
Tapping
Screws
Fasten
a
range
of
materials
together
without
needing
to
tap
the
hole
first
5 products
Wood
Screws
Fasten
material
to
wood
or
pieces
of
wood
to
each
other
16 products
Captive
Panel
Screws
Secure
panels
and
enclosures
while
still
having
access
to
them
5 products
Studs
Press,
weld,
or
screw
in
place
to
add
a
threaded
fastening
point
36 products
Elevator
Bolts
Create
a
flush
joint
to
allow
movement
in
tight
spaces
such
as
grain
elevators
and
belting
systems
14 products
Hanger
Bolts
Suspend
pipe
and
other
fixtures
with
wire
or
cable
ties
4 products
Thread
Adapters
Join
threads
of
a
different
type,
size,
and
gender
471 products
Threaded
Rods
Anchor,
connect,
or
hang
components
in
a
wide
variety
of
applications
149 products
Binding
Barrels
and
Screws
Thread
together
for
a
low
-
profile
fastener
13 products
Single
-
End
Studs
Use
the
unthreaded
end
as
a
pivot
point,
hinge,
shaft,
or
locator
pin
7 products
Standoffs
Threaded
to
separate
or
connect
parts
as
well
as
position
components
in
assemblies
1 product
Rivet
Nuts
Add
threads
to
thin
panels
with
access
from
only
one
side;
also
known
as
blind
inserts
38 products
Weld
Nuts
Weld
to
metal
surfaces
to
add
permanent
threads
21 products
Spring
Plungers
Apply
accurate,
consistent
pressure
for
positioning,
indexing,
and
ejecting
parts
23 products
Anchors
Secure
structural
joints
in
concrete,
brick,
and
other
building
materials
1 product
Fabricating and Machining
Setup
Studs
Secure
setup
clamps
and
fixtures
to
your
machine
table
or
assemble
heavy
machines
60 products
T
-
Slot
Bolts
Secure
clamps
and
workpieces
to
machine
tables
with
quicker
setup
than
a
T
-
slot
nut
and
stud
2 products
T
-
Slot
Nut
and
Setup
Stud
Kits
Mount
fixtures
of
different
sizes
to
your
machine
table
1 product
Clamps
Hold
workpieces
securely
in
place
7 products
Building and Machinery Hardware
Knobs
Position,
tighten,
and
secure
fixtures
and
equipment
38 products
Pull
Handles
and
Knobs
Open
and
close
cabinets,
drawers,
and
doors
on
machines
and
equipment
2 products
T
-
Slotted
Framing
and
Fittings
The
most
versatile
system,
attach
fittings
along
the
continuous
slots
to
build
virtually
anything
23 products
Power Transmission
Lead
Screws
and
Nuts
Components
travel
along
a
screw
with
broad,
square
threads
to
clamp
and
lift
heavy
loads
14 products
Connecting
Rods
Use
with
rod
ends
and
swivel
joints
to
link
components
in
push/pull
assemblies
57 products
Ball
Screws
and
Nuts
Internal
ball
bearings
roll
on
screws
for
low
friction
when
moving
components
at
high
speeds
2 products
Material Handling
Eyebolts
Route
rope
through
the
loop
or
attach
hooks
and
shackles
for
lifting
10 products
Eye
Nuts
Pair
with
bolts
or
threaded
rod
to
lift
and
hang
components
6 products
Measuring and Inspecting
Transfer
Punches
Mark
the
center
of
an
existing
hole
onto
a
separate
workpiece
1 product
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)