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24-Aug| 431 Comments
U.S. Screw Sizes: Decimal Equivalents in Inches and Metric Units

U.S. Screw Sizes: Decimal Equivalents in Inches and Metric Units

This article delves into U.S. screw sizes, providing insight into both their decimal representations in inches and their equivalents in metric units. Screws are commonplace fasteners in our daily lives, and understanding their specifications is crucial for various maintenance and construction tasks. In this piece, we will introduce the decimal notation of U.S. screw sizes and offer their corresponding values in metric units, enabling readers to better comprehend and select screws that suit their needs. Whether you are an engineer, a technician, or simply someone interested in screw specifications, this article will provide valuable insights. Let's explore this small yet significant mechanical component together.

US Screw size conversion chart:

Screw Size

Inch

Decimal

Nearest

Fraction

Metric

Equivalent

#0

0.060 in.

1/16"

1.52 mm

#1

0.073 in.

5/64"

1.85 mm

#2

0.086 in.

3/32"

2.18 mm

#3

0.099 in.

7/64"

2.51 mm

#4

0.112 in.

7/64"

2.84 mm

#5

0.125 in.

1/8"

3.18 mm

#6

0.138 in.

9/64"

3.51 mm

#8

0.164 in.

5/32"

4.17 mm

#10

0.190 in.

3/16"

4.83 mm

#12

0.216 in.

7/32"

5.49 mm

#14

0.250 in.

1/4"

6.35 mm

US Fraction to Metric mm equivalent chart:

US

METRIC


CONT. US

CONT. METRIC

1/16"

1.59 mm


1-3/8"

34.93 mm

1/8"

3.18 mm


1-1/2"

38.10 mm

3/16"

4.76 mm


1-5/8"

41.28 mm

1/4"

6.35 mm


1-3/4"

44.45 mm

5/16"

7.94 mm


1-7/8"

47.63 mm

3/8"

9.53 mm


2"

50.80 mm

7/16"

11.11 mm


2-1/4"

57.15 mm

1/2"

12.70 mm


2-1/2"

63.50 mm

9/16"

14.29 mm


2-3/4"

69.85 mm

5/8"

15.88 mm


3"

76.20 mm

11/16"

17.46 mm


3-1/4"

82.55 mm

3/4"

19.05 mm


3-1/2"

88.90 mm

7/8"

22.23 mm


3-3/4"

95.25 mm

1"

25.40 mm


4"

101.6 mm

1-1/4"

31.75 mm





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