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Conversion tables, inches/mm

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Converter between mm / inch,"

What you know
 Conversion factor Results
Tum x 25.4 = Millimeters
Millimeters x 0.03937 = Inch

Our inch threaded products

Hex head bolts, with UNF thread ANSI B18.2.1
Hex head bolts, with UNF thread ANSI B18.2.1
Prevailing torque type hex lock nuts with polyamide insert, with UNC thread, ANSI B18.2.2
Prevailing torque type hex lock nuts with polyamide insert, with UNC thread, ANSI B18.2.2
Prevailing torque type hex lock nuts with polyamide insert, with UNF thread, ANSI B18.2.2
Prevailing torque type hex lock nuts with polyamide insert, with UNF thread, ANSI B18.2.2
Hex nuts ~0,8d with UNF thread, ANSI B18.2
Hex nuts ~0,8d with UNF thread, ANSI B18.2
Hex head bolts, with UNC thread ANSI B18.2.1
Hex head bolts, with UNC thread ANSI B18.2.1
Threaded rod UNC, DIN 976
Threaded rod UNC, DIN 976
Hex nuts ~0,8d with UNC thread, ANSI B18.2
Hex nuts ~0,8d with UNC thread, ANSI B18.2

Translation table inches / mm

NOTE! At dimensions over 1" decide if its you want UNC or UN8 thread. The diffrent is number of threads/inch

Inches, " Millimetres, mm Thread pitches, inches, UNC/UNF
UNC UN8 UNF
1/8 3,175 40 - 44
3/16 4,762 24 - 32
1/4 6,35 20 - 28
5/16 7,937 18 - 24
3/8 9,525 16 - 24
7/16 11,112 14 - 20
1/2 12,7 13 - 20
9/16 14,288 12 - 18
5/8 15,875 11 - 18
3/4 19,05 10 - 16
7/8 22,225 9 - 14
1 25,4 8 8 12 (14)
1 1/8 28,575 7 8 12
1 1/4 31,75 7 8 12
1 3/8 34,925 6 8 12
1 1/2 38,1 6 8 12
1 5/8 41,275 - 8 -
1 3/4 44,45 - 8 -
1 7/8 47,625 - 8 -
2 50,8 4,5 8 -
2 1/4 57,15 4,5 8 -
2 1/2 63,5 4 8 -
2 3/4 69,85 4 8 -
3 76,2 4 8 -
3 1/4 82,55 4 8 -
3 1/2 88,9 4 8 -
3 3/4 95,25 4 8 -
4 101,6 4 8 -