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System of Measurement
Inch
Metric
Thread Size
4-40
4-48
6-32
6-48
8-32
8-40
10-24
10-32
1/4"
-20
1/4"
-28
5/16"
-18
5/16"
-24
3/8"
-16
1/2"
-13
M2
M2.5
M3
M3.5
M4
M5
M6
M8
M10
Length
1/4"
5/16"
3/8"
7/16"
1/2"
5/8"
3/4"
7/8"
1"
1
1/4"
1
1/2"
1
5/8"
1
3/4"
2"
2
1/4"
2
1/2"
3"
6
1/4"
Material
18-8 Stainless Steel
Aluminum
Brass
Steel
Head Diameter
3/16"
1/4"
19/64"
5/16"
3/8"
25/64"
13/32"
27/64"
7/16"
29/64"
1/2"
9/16"
37/64"
5/8"
41/64"
11/16"
3/4"
7/8"
1"
4.8 mm
6 mm
7 mm
7.5 mm
8 mm
9.5 mm
10 mm
11 mm
11.5 mm
12 mm
12.7 mm
13 mm
14.5 mm
15.9 mm
16 mm
16.5 mm
19 mm
19.5 mm
20 mm
22.2 mm
24 mm
30 mm
Thumb Screw Head Profile
Flared Collar
High
Low
Narrow
Threading
Fully Threaded
Partially Threaded
Head Height
1/8"
9/64"
5/32"
3/16"
7/32"
1/4"
9/32"
5/16"
3/8"
1/2"
9/16"
5/8"
11/16"
13/16"
2.5 mm
3 mm
3.5 mm
4 mm
5 mm
6 mm
6.5 mm
7 mm
7.9 mm
8.5 mm
9.5 mm
12.7 mm
14.3 mm
17.5 mm
Diameter
1/2"
5/8"
3/4"
1"
1
1/4"
1
3/4"
3"
Thread Length
1/4"
5/16"
3/8"
7/16"
9/16"
5/8"
11/16"
13/16"
15/16"
1
3/16"
1
1/4"
1
3/8"
1
7/16"
1
11/16"
1
7/8"
1
15/16"
2
3/16"
2
3/8"
2
7/16"
2
15/16"
6.5 mm
6.8 mm
7.25 mm
7.5 mm
7.8 mm
9.25 mm
9.5 mm
9.8 mm
11.1 mm
11.25 mm
11.5 mm
11.8 mm
12.25 mm
12.5 mm
13.1 mm
14.1 mm
14.25 mm
14.5 mm
16.1 mm
17.1 mm
Teeth per Inch
10
12
14
16
20
21
25
30
33
35
40
50
80
For Use On
Aluminum
Brass
Bronze
Cast Iron
Nickel
Plastic
Stainless Steel
Steel
Titanium
Face Width
3/16"
1/4"
5/16"
3/8"
1/2"
Thread Spacing
Coarse
Fine
Extra Fine
Knurl Pattern
Left-Hand Spiral
Right-Hand Spiral
Straight
Hole Diameter
3/16"
7/32"
1/4"
5/16"
1/2"
RoHS
Compliant
Compliant with Exemptions
Not Compliant
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
Yes
No
REACH
Compliant
Not Compliant
DFARS Specialty Metals
Compliant
Exempt
Not Compliant
Export Control Classification Number (ECCN)
EAR99
Thread Type
Metric
UNC
UNF
UNS
Thread Pitch
0.4 mm
0.45 mm
0.5 mm
0.6 mm
0.7 mm
0.8 mm
1 mm
1.25 mm
1.5 mm
Finish
Black Oxide
Uncoated
For Knurl Finish
Coarse
Fine
Medium
Collar Height
1/8"
5/32"
11/64"
3/16"
1/4"
3 mm
3.5 mm
4 mm
4.5 mm
5 mm
6.5 mm
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602 Products
Fabricating and Machining
Knurls
Pair with a knurling tool to add patterns to workpieces for a better grip
96 products
Hand Knurling Tools
Without using a lathe, create grooved patterns on workpieces to improve their grip
3 products
Lathe Tools
Shape workpieces as they rotate on a lathe
27 products
Lathe Centers
Use in a lathe's headstock or tailstock to support the end of a workpiece
5 products
Fastening and Joining
Thumb Screws
Tighten and loosen by hand without the need for tools
467 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)