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System of Measurement
Inch
Metric
Thread Size
2
-
5
6
4
-
4
0
4
-
4
8
6
-
3
2
6
-
4
0
8
-
3
2
8
-
3
6
1
0
-
2
4
1
0
-
3
2
1
/
4
"
-
2
0
1
/
4
"
-
2
8
1
/
4
"
-
3
2
5
/
1
6
"
-
1
8
5
/
1
6
"
-
2
4
5
/
1
6
"
-
3
2
Length
0
.
5
6
4
"
0
.
5
9
"
0
.
6
9
"
3
/
4
"
0
.
8
1
"
0
.
8
4
"
7
/
8
"
1
"
1
.
1
2
"
1
1
/
8
"
1
.
1
5
6
"
1
.
1
6
"
1
1
/
4
"
1
3
/
8
"
1
1
/
2
"
Material
Aluminum
Brass
Stainless Steel
Steel
Thread Length
5
/
3
2
"
3
/
1
6
"
0
.
1
9
"
1
3
/
6
4
"
0
.
2
2
1
"
1
/
4
"
0
.
2
8
"
0
.
3
1
"
5
/
1
6
"
0
.
3
7
"
3
/
8
"
0
.
4
0
6
"
0
.
4
1
"
7
/
1
6
"
0
.
4
5
"
Thread Pitch
0.7 mm
0.8 mm
1 mm
1.25 mm
1.5 mm
1.75 mm
2 mm
2.5 mm
3 mm
3.5 mm
4 mm
4.5 mm
5 mm
Thread Type
BSPP
BSPT
Metric
NPT
NPTF
UNC
UNF
Universal
Thread Direction
Left Hand
Right Hand
Hex Length
1/8"
3/16"
1/4"
3/8"
9/16"
11/16"
3.2 mm
4.8 mm
6.3 mm
6.35 mm
6.4 mm
9.5 mm
Tensile Strength
Less than 70,000 psi
70,000 psi to 79,999 psi
80,000 psi to 99,999 psi
100,000 psi to 119,999 psi
120,000 psi or greater
Not Rated
Finish
Black Oxide
Zinc Plated
Shape
Hex
Round
Screw Size
No. 8
No. 10
1/4"
5/16"
3/8"
1/2"
M5
M6
M8
M10
For Adapting
Thread Direction
Thread Size
Thread Type
Drive Style
External Hex
Hex
Pitch
0.35 mm
0.45 mm
0.5 mm
0.6 mm
0.7 mm
0.75 mm
0.8 mm
1 mm
1.25 mm
1.5 mm
1.75 mm
Thread Fit
ASME Interference Class 5
Metric Class 6g
Metric Interference Sk6
Unified Standard Class 1A
Unified Standard Class 2A
Unified Standard Class 3A
Hardness
Rockwell B56
Rockwell B65
Rockwell B67
Rockwell B70
Rockwell B80
Rockwell B82
Rockwell B83
Rockwell B85
Rockwell C19
Rockwell C20
Rockwell C22
Rockwell C23
Rockwell C24
Rockwell C25
Rockwell C26
Rockwell C27
Rockwell C28
Rockwell C29
Rockwell C30
Rockwell C31
Rockwell C32
Rockwell C33
Rockwell C35
Rockwell C39
Not Rated
REACH
Compliant
Not Compliant
DFARS Specialty Metals
Compliant
Exempt
Not Compliant
RoHS
Compliant
Compliant with Exemptions
Not Compliant
Export Control Classification Number (ECCN)
2B999
EAR99
Thread Spacing
Coarse
Fine
Hex Size
3/16"
13/64"
1/4"
5/16"
3/8"
1/2"
9/16"
3/4"
15/16"
1
1/8"
4.5 mm
6 mm
6.4 mm
7.9 mm
8 mm
9.5 mm
10 mm
12.7 mm
13 mm
17 mm
17.4 mm
19 mm
Specifications Met
ASTM Standard
DIN Standard
Shoulder Diameter
1/4"
5/16"
3/8"
1/2"
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Join threads of a different type, size, and gender
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