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Thread
Spacing
Coarse
Fine
Extra
Fine
Ultra
Fine
System
of
Measurement
Inch
Metric
Thread
Size
0
0
0
0
-
1
6
0
0
0
0
-
1
2
0
0
0
-
9
0
0
0
-
9
6
0
-
8
0
1
-
7
2
2
-
6
4
3
-
5
6
4
-
4
8
5
-
4
4
6
-
4
0
6
-
4
8
6
-
8
0
8
-
3
6
8
-
4
0
Length
1
/
1
6
"
5
/
6
4
"
3
/
3
2
"
7
/
6
4
"
1
/
8
"
5
/
3
2
"
3
/
1
6
"
7
/
3
2
"
1
/
4
"
9
/
3
2
"
0
.
2
9
"
0
.
3
0
1
"
5
/
1
6
"
1
1
/
3
2
"
0
.
3
5
"
Fastener
Head
Type
12
-
Point
Eye
Flat
Headless
Hex
Oval
Rounded
Socket
Tee
Thumb
Material
400
Nickel
Aluminum
Brass
Bronze
Plastic
Stainless
Steel
Steel
Titanium
Threading
Fully
Threaded
Partially
Threaded
Threaded
on
Both
Ends
Threaded
on
One
End
Drive
Style
Asymmetrical
Drilled
Spanner
External
12
-
Point
External
Hex
Hex
One
Way
Phillips
Slotted
Spring
Plunger
Wrench
Tamper
-
Resistant
Hex
Tamper
-
Resistant
Torx
Tamper
-
Resistant
Torx
Plus
Torx
Torx
Plus
Tri
-
Groove
Finish
A
n
o
d
i
z
e
d
B
l
a
c
k
O
x
i
d
e
B
l
a
c
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Z
i
n
c
P
l
a
t
e
d
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
D
y
e
d
N
e
o
p
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e
n
e
C
o
a
t
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d
P
a
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s
i
v
a
t
e
d
P
h
o
s
p
h
a
t
e
C
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a
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e
d
P
T
F
E
C
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P
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P
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d
T
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Z
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c
P
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d
Head
Diameter
0
.
0
3
8
"
0
.
0
4
0
"
0
.
0
5
6
"
0
.
0
6
0
"
0
.
0
6
1
"
0
.
0
6
2
"
0
.
0
6
5
"
0
.
0
8
2
"
0
.
0
8
6
"
0
.
0
8
9
"
0
.
0
9
"
0
.
0
9
6
"
0
.
1
0
7
"
0
.
1
1
"
0
.
1
1
2
"
Socket
Head
Profile
High
Low
Standard
Ultra
Low
Head
Height
0
.
0
1
1
"
0
.
0
1
6
"
0
.
0
1
8
"
0
.
0
2
5
"
0
.
0
2
6
"
0
.
0
2
8
"
0
.
0
3
0
"
0
.
0
3
1
"
0
.
0
3
2
"
0
.
0
3
3
"
0
.
0
3
5
"
0
.
0
3
6
"
0
.
0
3
7
"
0
.
0
3
9
"
0
.
0
4
1
"
Thread
Type
Metric
UN
UNC
UNEF
UNF
UNRF
UNS
Thread
Direction
Left
Hand
Right
Hand
Thread
Pitch
0.2
mm
0.25
mm
0.35
mm
0.5
mm
0.75
mm
0.8
mm
1
mm
1.25
mm
1.5
mm
2
mm
3
mm
Drive
Size
0
.
0
2
8
"
0
.
0
3
5
"
0
.
0
5
0
"
1
/
1
6
"
5
/
6
4
"
3
/
3
2
"
7
/
6
4
"
1
/
8
"
9
/
6
4
"
5
/
3
2
"
3
/
1
6
"
7
/
3
2
"
1
/
4
"
5
/
1
6
"
3
/
8
"
Fastener
Strength
Grade/Class
ASTM
Grade
B6
ASTM
Grade
B7
ASTM
Grade
B8
ASTM
Grade
BD
ISO
Class
8.8
ISO
Class
10.9
ISO
Class
12.9
SAE
Grade
2
SAE
Grade
5
SAE
Grade
8
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
Rounded
Head
Style
Binding
Button
Carriage
Fillister
Pan
Round
Truss
Specifications
Met
ASME
Standard
ASTM
Standard
DIN
Standard
Federal
Specification
IFI
Standard
ISO
Standard
NAS
SAE
Standard
Screw
Size
No.
0
No.
10
1/4"
Thread
Fit
Metric
Class
5g6g
Metric
Class
6g
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
Countersink
Angle
82°
90°
100°
Forward
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9,586 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
1,356 products
Rounded Head Screws
Sit just above the surface for a low-profile finish and hold tighter than flat head screws
1,529 products
Hex Head Screws
Used with nuts to create a stronger joint than flat and rounded screws
1,605 products
Flat Head Screws
Fit in countersunk holes for a flush finish
939 products
Set Screws
Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads
1,124 products
Shoulder Screws
Rotate parts around the cylinder under the head to guide and align them during installation
638 products
Thumb Screws
Tighten and loosen by hand without the need for tools
260 products
12-Point Screws
12 contact points handle more torque than a hex head while a flange eliminates the need for a washer
77 products
Tapping Screws
Fasten a range of materials together without needing to tap the hole first
94 products
Captive Panel Screws
Secure panels and enclosures while still having access to them
50 products
Carriage Bolts
A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut
13 products
Hanger Bolts
Suspend pipe and other fixtures with wire or cable ties
19 products
Studs
Press, weld, or screw in place to add a threaded fastening point
54 products
T-Bolts
Turn by hand for easy fastening, use as a handle, or attach as a point for straps and clamps
4 products
Elevator Bolts
Create a flush joint to allow movement in tight spaces such as grain elevators and belting systems
3 products
Threaded Rods
Anchor, connect, or hang components in a wide variety of applications
1,249 products
Single-End Studs
Use the unthreaded end as a pivot point, hinge, shaft, or locator pin
47 products
Spring Plungers
Apply accurate, consistent pressure for positioning, indexing, and ejecting parts
156 products
Binding Barrels and Screws
Thread together for a low-profile fastener
29 products
Rivet Nuts
Add threads to thin panels with access from only one side; also known as blind inserts
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Weld Nuts
Weld to metal surfaces to add permanent threads
198 products
Thread Adapters
Join threads of a different type, size, and gender
27 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)