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System
of
Measurement
Inch
Metric
Length
5
/
3
2
"
1
/
4
"
5
/
1
6
"
3
/
8
"
7
/
1
6
"
1
/
2
"
0
.
5
1
4
"
9
/
1
6
"
0
.
5
9
2
"
0
.
6
"
5
/
8
"
0
.
6
5
5
"
1
1
/
1
6
"
0
.
6
9
"
0
.
7
0
5
"
Thread
Size
See all
5/16"
-
18
Material
400
Nickel
Aluminum
Brass
Bronze
Carbon
Fiber
Fiberglass
Iron
Plastic
Stainless
Steel
Steel
Titanium
Zinc
Threading
Fully
Threaded
Partially
Threaded
Threaded
on
Both
Ends
Threaded
on
One
End
Fastener
Head
Type
12
-
Point
Flat
Headless
Hex
Hook
Oval
Rounded
Socket
Square
Tee
Thumb
Finish
B
l
a
c
k
O
x
i
d
e
B
r
o
n
z
e
P
l
a
t
e
d
C
a
d
m
i
u
m
P
l
a
t
e
d
C
h
r
o
m
e
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
G
a
l
v
a
n
i
z
e
d
H
o
t
-
D
i
p
p
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
i
c
k
e
l
P
l
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
T
F
E
C
o
a
t
e
d
P
V
C
C
o
a
t
e
d
Drive
Style
Drilled
Spanner
External
12
-
Point
External
Hex
External
Square
Hex
Phillips
Slotted
Spring
Plunger
Wrench
Square
Tamper
-
Resistant
Hex
Tamper
-
Resistant
Torx
Torx
Torx
Plus
Tri
-
Groove
Head
Width
5/16"
3/8"
1/2"
11/16"
13/16"
7/8"
1"
1
19/64"
1
1/2"
1
11/16"
1
3/4"
3"
Fastener
Strength
Grade/Class
ASTM
Grade
B7
ASTM
Grade
B8
ASTM
Grade
B8M
ASTM
Grade
B16
ASTM
Grade
A
ASTM
Grade
BD
SAE
Grade
2
SAE
Grade
5
SAE
Grade
8
SAE
Grade
9
Head
Height
5
/
6
4
"
0
.
1
0
9
"
7
/
6
4
"
0
.
1
1
"
1
/
8
"
0
.
1
2
7
"
0
.
1
3
4
"
0
.
1
3
8
"
5
/
3
2
"
0
.
1
5
8
"
0
.
1
6
6
"
1
1
/
6
4
"
0
.
1
7
6
"
0
.
1
7
8
"
0
.
1
8
3
"
Thread
Direction
Left
Hand
Right
Hand
Thread
Type
NPT
UNC
UNF
UNRC
Thread
Spacing
Coarse
Fine
Socket
Head
Profile
High
Low
Standard
Ultra
Low
Head
Diameter
3
/
8
"
0
.
3
8
0
"
7
/
1
6
"
0
.
4
3
8
"
1
5
/
3
2
"
0
.
4
6
9
"
1
/
2
"
0
.
5
1
8
"
0
.
5
4
7
"
9
/
1
6
"
0
.
5
7
"
3
7
/
6
4
"
0
.
5
9
"
0
.
5
9
7
"
0
.
6
"
Screw
Size
No.
8
5/16"
Screw
Features
Flanged
Nonmarring
Tip
Sealing
Vented
With
Washer
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
Specifications
Met
ASME
Standard
ASTM
Standard
DIN
912
Federal
Specification
IEC
61340
-
5
-
1
IFI
Standard
ISO
4762
NAS
SAE
Standard
Drive
Size
3
/
3
2
"
1
/
8
"
5
/
3
2
"
3
/
1
6
"
7
/
3
2
"
1
/
4
"
5
/
1
6
"
3
/
8
"
I
P
4
0
I
P
4
5
N
o
.
3
N
o
.
4
N
o
.
1
4
N
o
.
2
0
T
4
0
Rounded
Head
Style
Button
Carriage
Fillister
Pan
Round
Truss
Thread
Fit
Metric
Class
6g
Metric
Class
6H
Unified
Standard
Class
1A
Unified
Standard
Class
1B
Unified
Standard
Class
2A
Unified
Standard
Class
2B
Unified
Standard
Class
3A
Unified
Standard
Class
3B
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3,965 Products
Fastening and Joining
Hex
Head
Screws
Used
with
nuts
to
create
a
stronger
joint
than
flat
and
rounded
screws
552 products
Socket
Head
Screws
With
a
deeper
drive
than
flat
and
rounded
head
screws,
these
withstand
more
torque
for
a
tighter
hold
341 products
Rounded
Head
Screws
Sit
just
above
the
surface
for
a
low
-
profile
finish
and
hold
tighter
than
flat
head
screws
330 products
Flat
Head
Screws
Fit
in
countersunk
holes
for
a
flush
finish
264 products
Carriage
Bolts
A
smooth
head
provides
a
finished
look
while
a
square
neck
keeps
the
bolt
in
place
when
using
a
nut
135 products
Thumb
Screws
Tighten
and
loosen
by
hand
without
the
need
for
tools
153 products
12
-
Point
Screws
12
contact
points
handle
more
torque
than
a
hex
head
while
a
flange
eliminates
the
need
for
a
washer
24 products
Shoulder
Screws
Rotate
parts
around
the
cylinder
under
the
head
to
guide
and
align
them
during
installation
417 products
Tapping
Screws
Fasten
a
range
of
materials
together
without
needing
to
tap
the
hole
first
58 products
Elevator
Bolts
Create
a
flush
joint
to
allow
movement
in
tight
spaces
such
as
grain
elevators
and
belting
systems
49 products
Set
Screws
Exert
pressure
at
the
tip
to
hold
parts
in
place,
unlike
screws
that
hold
material
together
with
threads
263 products
Square
Head
Screws
Turn
the
large
flat
sides
with
a
wrench
into
square
holes
that
stop
further
rotation
18 products
Studs
Press,
weld,
or
screw
in
place
to
add
a
threaded
fastening
point
82 products
T
-
Bolts
Turn
by
hand
for
easy
fastening,
use
as
a
handle,
or
attach
as
a
point
for
straps
and
clamps
1 product
Hold
-
Down
Bolts
Hold
material
under
the
bent
head
while
the
other
end
is
tightened
down
with
a
nut
4 products
Captive
Panel
Screws
Secure
panels
and
enclosures
while
still
having
access
to
them
7 products
Wood
Screws
Fasten
material
to
wood
or
pieces
of
wood
to
each
other
5 products
Binding
Barrels
and
Screws
Thread
together
for
a
low
-
profile
fastener
73 products
Threaded
Rods
Anchor,
connect,
or
hang
components
in
a
wide
variety
of
applications
267 products
Thread
Adapters
Join
threads
of
a
different
type,
size,
and
gender
265 products
Single
-
End
Studs
Use
the
unthreaded
end
as
a
pivot
point,
hinge,
shaft,
or
locator
pin
11 products
Anchors
Secure
structural
joints
in
concrete,
brick,
and
other
building
materials
39 products
Rivet
Nuts
Add
threads
to
thin
panels
with
access
from
only
one
side;
also
known
as
blind
inserts
44 products
Weld
Nuts
Weld
to
metal
surfaces
to
add
permanent
threads
34 products
Standoffs
Threaded
to
separate
or
connect
parts
as
well
as
position
components
in
assemblies
1 product
Spring
Plungers
Apply
accurate,
consistent
pressure
for
positioning,
indexing,
and
ejecting
parts
77 products
Fabricating and Machining
Locating
Pin
Lock
Screws
Secure
removable
locating
pins
2 products
Drill
Bushing
Lock
Screws
Prevent
drill
bushings
from
spinning
6 products
Setup
Studs
Secure
setup
clamps
and
fixtures
to
your
machine
table
or
assemble
heavy
machines
29 products
T
-
Slot
Nuts
Combine
with
setup
studs
or
bolts
to
mount
fixtures
to
machine
tables
10 products
Clamps
Hold
workpieces
securely
in
place
11 products
Material Handling
Eyebolts
Route
rope
through
the
loop
or
attach
hooks
and
shackles
for
lifting
79 products
Hoist
Rings
Pivot
to
resist
stress
that
would
bend
or
break
an
eyebolt
when
lifting
at
an
angle
18 products
Eye
Nuts
Pair
with
bolts
or
threaded
rod
to
lift
and
hang
components
4 products
U
-
Bolts
Anchor
heavy
pipe,
tube,
and
conduit;
stronger
than
routing
clamps
and
hangers
124 products
Routing
Rings
Suspend
wire
and
cable
by
feeding
it
through
the
eyehole
2 products
Wheel
Axles
Connect
rotating
wheels
and
support
vehicles
2 products
Facility and Grounds Maintenance
Toilet
Mounts
Secure
toilet
components
with
flanges
and
hardware
kits
3 products
Building and Machinery Hardware
Cam
Handles
For
fast
clamping,
push
down
on
the
handle
to
draw
two
parts
together
9 products
T
-
Slotted
Framing
and
Fittings
The
most
versatile
system,
attach
fittings
along
the
continuous
slots
to
build
virtually
anything
17 products
Containers, Storage, and Furniture
Hanging
Hooks
Hang
tools,
hoses,
garments,
and
other
supplies
on
walls
for
easy
access
7 products
Electrical
Battery
Terminal
Fasteners
Replace
bolts
in
battery
terminals
2 products
Power Transmission
Connecting
Rods
Use
with
rod
ends
and
swivel
joints
to
link
components
in
push/pull
assemblies
18 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)