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System of Measurement
Inch
Metric
For Use With
Bolts
Drill Bits
Nails
Nuts
Pins
Pipe
Pipe Fittings
Rivets
Screws
Threaded Rods
Tube Fittings
Tubing
Wire
Thread Size
1-64
1-72
2-56
2-64
3-48
3-56
4-36
4-40
4-48
5-40
5-44
6-32
6-36
6-40
8-32
8-36
8-40
10-24
Thread Type
Acme
BSPP
BSPT
BSW
Metric
Metric Trapezoidal
NPT
UNC
UNF
Material
Brass
Copper
Plastic
Stainless Steel
Steel
Screw Size
No. 1
No. 2
No. 3
No. 4
No. 5
No. 6
No. 8
No. 10
No. 12
1/8"
5/32"
3/16"
7/32"
1/4"
9/32"
5/16"
3/8"
7/16"
Thread Location
External
Internal
Thread Pitch
0.25 mm
0.3 mm
0.35 mm
0.4 mm
0.45 mm
0.5 mm
0.55 mm
0.6 mm
0.65 mm
0.7 mm
0.75 mm
0.8 mm
0.85 mm
0.9 mm
1 mm
1.1 mm
1.2 mm
1.25 mm
Diameter
0.073"
0.086"
3/32"
0.112"
1/8"
0.138"
5/32"
0.164"
3/16"
7/32"
1/4"
9/32"
5/16"
Manufacturer
Mitutoyo
Starrett
Height
1
5/8"
2
3/8"
3
3/16"
3
1/2"
3
3/4"
4
1/4"
5
1/8"
5
3/8"
39"
Number of Identifiers
12
16
22
27
28
30
50
51
52
Width
3/4"
3"
3
3/8"
5
1/8"
5
1/4"
7
1/2"
8
11/16"
9"
10
1/2"
Thickness
1/64"
3/64"
5/64"
3/32"
7/64"
1/8"
1/2"
Container Type
Folding Case
Pouch
Drill Bit Size
1/32"
3/64"
1/16"
5/64"
3/32"
7/64"
1/8"
9/64"
5/32"
11/64"
3/16"
13/64"
7/32"
15/64"
1/4"
17/64"
9/32"
19/64"
Export Control Classification Number (ECCN)
EAR99
Pipe Size
1/16
1/8
1/4
3/8
1/2
3/4
1
1
1/4
1
1/2
2
2
1/2
3
3
1/2
4
5
6
RoHS
Compliant
Not Compliant
DFARS Specialty Metals
Exempt
Pipe Material
Brass
PVC
Steel
REACH
Compliant
Not Compliant
For Nut Size
No. 2
No. 3
No. 4
No. 5
No. 6
No. 8
No. 10
No. 12
1/4"
5/16"
3/8"
7/16"
1/2"
9/16"
5/8"
M3
M4
M5
M6
M8
M10
M11
M12
M13
M14
M17
M19
M22
M24
Threads per Inch
1
1
1/3
1
1/2
1
3/4
2
2
1/4
2
3/8
2
1/2
2
5/8
2
3/4
2
7/8
3
3
1/4
3
1/2
4
4
1/2
5
5
1/2
Manufacturer Model Number
6
155
156M
159M
188-102
472
474
476
484
C391
Container Material
Plastic
Vinyl Plastic
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40 Products
Measuring and Inspecting
Thread Size Identifiers
Confirm your fastener's thread size, pitch, or threads per inch
38 products
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Reference Charts
Check decimal equivalents, drill sizes, or specifications for socket screws
2 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)