UNC to Metric / UNF to Metric

 

UNC to metric fasteners conversion data for industrial bolts und machine screws. Metric screws and inch screws are very similar, but they are different thread types and basic units. The screw types are not compatible and cannot be interchanged. In the following conversion chart we would like to show you which inch screws and which metric screws can be compared with each other.

 

UNC to metric Converstion Chart

Inch Equivalent

UNC

Coarse Metric

Size x Pitch

1 - 64 M2 x 0.40
3 - 48 M2.5 x 0.45
4 - 40 M3 x 0.50
6 - 32 M3.5 x 0.60
8 - 32 M4 x 0.70
10 - 24 M5 x 0.80
1/4 - 20 M6 x 1.00
5/16 - 18 M8 x 1.25
3/8 - 16 M10 x 1.50
7/16 - 14 M12 x 1.75
1/2 - 13 M14 x 2.00
9/16 - 12 M16 - 2.00
5/8 - 11 M20 x 2.50
3/4 - 10 M22 x 2.50
7/8 - 9 M24 x 3.00
1 - 8 M27 x 3.00
1 - 1/8 - 7 M30 x 3.50
1 - 1/4 - 7 M36 x 4.00
1 - 3/8 - 6 M42 x 4.50
1 - 1/2 - 6 M48 x 5.00

* All information without guarantee.

UNF to metric Converstion Chart

Inch Equivalent

UNF

Fine Metric

Size x Pitch

1/4 - 20 M6 x 0.75
5/16 - 18 M8 x 1.00
3/8 - 16 M10 x 1.25
7/16 - 14 M12 x 1.50
1/2 - 13 M14 x 1.50
9/16 - 12 M16 x 1.50
5/8 - 11 M20 x 1.50
3/4 - 10 M22 x 1.50
7/8 - 9 M24 x 2.00
1 - 8 M27 x 2.00
1 - 1/8 - 7 M30 x 2.00
1 - 1/4 - 7 M36 x 2.00
1 - 3/8 - 6 M42 x 2.00
1 - 1/2 - 6 M48 x 2.00

* All information without guarantee.