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System of Measurement
Inch
Metric
Thread Size
6-32
8-32
10-24
10-32
12-24
12-28
1/4"
-20
1/4"
-28
1/4"
-32
5/16"
-18
5/16"
-24
5/16"
-32
3/8"
-16
3/8"
-24
M4
M5
M6
Length
1
/
8
"
5
/
3
2
"
3
/
1
6
"
1
/
4
"
9
/
3
2
"
5
/
1
6
"
3
/
8
"
7
/
1
6
"
1
/
2
"
9
/
1
6
"
5
/
8
"
1
1
/
1
6
"
3
/
4
"
7
/
8
"
1
"
Fastener Head Type
Flat
Headless
Rounded
Socket
Thumb
Material
400 Nickel
Aluminum
Brass
Grade 2 Titanium
Plastic
Stainless Steel
Steel
Drive Style
Hex
Tamper-Resistant Hex
Threading
Fully Threaded
Partially Threaded
Threaded on Both Ends
Finish
Anodized
Black Oxide
Cadmium Plated
Chrome Plated
Passivated
Silver Plated
Titanium Carbon Nitride (TiCN) Coated
Zinc Flake Coated
Zinc Plated
Socket Head Profile
High
Low
Standard
Ultra Low
Head Diameter
0.312"
5/16"
0.313"
0.324"
0.359"
0.361"
0.380"
0.411"
0.413"
0.437"
7/16"
0.438"
0.477"
0.493"
1/2"
0.531"
0.578"
5/8"
0.656"
7.59 mm
7.9 mm
8.94 mm
9.5 mm
10.49 mm
11.2 mm
13.44 mm
Thread Direction
Left Hand
Right Hand
Thread Type
Metric
UNC
UNEF
UNF
UNRC
UNRF
Drive Size
Hide
0
.
0
2
8
"
0
.
0
3
5
"
3
/
6
4
"
0
.
0
5
0
"
1
/
1
6
"
5
/
6
4
"
3
/
3
2
"
7
/
6
4
"
1
/
8
"
9
/
6
4
"
0
.
1
5
6
"
5
/
3
2
"
3
/
1
6
"
7
/
3
2
"
1
/
4
"
9
/
3
2
"
5
/
1
6
"
3
/
8
"
7
/
1
6
"
1
/
2
"
9
/
1
6
"
5
/
8
"
3
/
4
"
1
3
/
1
6
"
7
/
8
"
1
"
1
1
/
4
"
1
1
/
2
"
1
3
/
4
"
0
.
7
m
m
0
.
9
m
m
1
m
m
1
.
3
m
m
1
.
5
m
m
2
m
m
2
.
5
m
m
3
m
m
4
m
m
4
.
5
m
m
5
m
m
6
m
m
7
m
m
8
m
m
1
0
m
m
1
2
m
m
1
3
m
m
1
4
m
m
1
5
m
m
1
7
m
m
1
9
m
m
2
2
m
m
2
4
m
m
2
7
m
m
3
2
m
m
3
6
m
m
I
P
1
I
P
2
I
P
3
I
P
5
I
P
6
I
P
7
I
P
8
I
P
1
0
I
P
1
5
I
P
2
0
I
P
2
5
I
P
2
7
I
P
3
0
I
P
4
0
I
P
4
5
I
P
5
0
I
P
R
1
0
I
P
R
1
5
I
P
R
2
0
I
P
R
2
5
I
P
R
2
7
I
P
R
3
0
N
o
.
0
N
o
.
1
N
o
.
2
N
o
.
3
N
o
.
4
N
o
.
5
N
o
.
6
N
o
.
8
N
o
.
1
0
N
o
.
1
2
N
o
.
1
4
N
o
.
2
0
T
1
T
2
T
3
T
4
T
5
T
6
T
7
T
8
T
1
0
T
1
5
T
2
0
T
2
5
T
2
7
T
3
0
T
4
0
T
4
5
U
1
0
U
2
5
Head Height
5/64"
0.087"
0.101"
0.107"
0.109"
7/64"
0.112"
0.114"
1/8"
0.127"
0.132"
9/64"
0.156"
5/32"
0.158"
0.161"
0.178"
0.187"
3/16"
0.19"
0.21"
0.216"
7/32"
1/4"
0.285"
7/16"
2.18 mm
2.48 mm
2.74 mm
3.1 mm
3.28 mm
3.72 mm
4.8 mm
Flat Head Profile
Standard
Undercut
Countersink Angle
82°
90°
100°
Rounded Head Style
Button
Thread Spacing
Coarse
Fine
Extra Fine
Specifications Met
ASME B18.3
ASTM Standard
DIN 912
Federal Specification
ISO 4762
NAS
SAE Standard
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 Size
No. 8
No. 10
No. 14
5/16"
Shoulder Length
7
/
6
4
"
1
/
8
"
0
.
1
3
"
t
o
1
.
9
9
"
5
/
3
2
"
3
/
1
6
"
7
/
3
2
"
1
/
4
"
9
/
3
2
"
5
/
1
6
"
1
1
/
3
2
"
3
/
8
"
1
3
/
3
2
"
7
/
1
6
"
1
5
/
3
2
"
1
/
2
"
DFARS Specialty Metals
Compliant
Exempt
Not Compliant
Export Control Classification Number (ECCN)
1C998
2B999
EAR99
RoHS
Compliant
Compliant with Exemptions
Not Compliant
REACH
Compliant
Not Compliant
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