Asked by: Glafira Muzarev
hobbies and interests woodworking

What size is a #8 wood screw?

Last Updated: 10th January, 2020

26
Wood Screw Diameters
Size Major Thread Diameter*
Decimal Nearest Fractional Measurement
#8 .164" 5/32"
#9 .177" 11/64"
#10 .190" 3/16"

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Likewise, what size is a #8 screw?

A #8 screw size is . 164 fraction of an inch. The diameters listed in the chart below are in fractions of an inch, so the #12 is just shy of 1/4 inch.

Subsequently, question is, how do you determine the size of a wood screw? So the length of a flat head wood screw is measured from the tip to the top of the head, but the length of a round head screw is measured from the tip to the bottom of the head. In the common wood screw the thread extends 2/3rds of the length of the screw.

People also ask, what does a #8 screw mean?

Their size is described as diameter, number of threads per inch (if used with a nut or in a threaded hole), and length in inches. In all cases, the larger the number, the larger the size. Consequently a #8 screw is larger than a #4 screw, just as a 3 inch bolt is larger than a 2 inch bolt.

Is a #8 or #10 screw bigger?

Screws with a diameter smaller than 1/4" have a nominal size indicated by a number (e.g. #8 or #10). 1/4" and larger diameters are shown as inches. So, a 1/4-20 screw has a 1/4" diameter (. 250") with 20 threads per inch.

Related Question Answers

Dafne Artur

Professional

What size hole do you drill for a #8 screw?

Wood Screw Pilot Hole Sizes
Screw Size Hard Wood
Tapered Bit Straight Bit
#7 5/32" 7/64"
#8 11/64" 1/8"
#9 3/16" 9/64"

Hiba Drzewieck

Professional

What is the difference between #8 and #10 screws?

Screws with a diameter smaller than 1/4" have a nominal size indicated by a number (e.g. #8 or #10). 1/4" and larger diameters are shown as inches. The diameter refers to the major diameter, or outside edge, of the threads.

Indhira Gillen

Professional

What size drill bit should I use for a #8 screw?

When you find the right size bit, store it with the box of screws so you know which one it is.

Drill bit sizes for pre-drilling (most commonly used sizes in bold)
Screw Size Pilot hole size for hardwoods* Pilot hole size for softwood**
#8 1/8 3/32
#9 1/8 3/32
#10 1/8 7/64
#11 5/32 9/64

Saghir Delpech

Explainer

How many MM is a #8 screw?

Diameter/Decimal/Metric Chart for Small Diameter Fasteners
Gauge or Diameter Decimal (in) mm
No.4 0.112 2.845
No.5 0.125 3.175
No.6 0.138 3.505
No.8 0.164 4.166

Basiliso Reckers

Explainer

Should I use #6 or #8 drywall screws?

#8 is coarse thread for wood studs. #6 is fine thread for metal studs. For metal studs I usually use the fine thread screws with the self drilling point, but is not really necessary for such thin metal, any fine thread drywall screw will work.

Penda Lammli

Explainer

How big is a #10 screw?

1. The number “10” is used as a size designator and has no numerical meaning. “32” refers to the 32-thread pitch in threads per inch. You can identify a 10-32 screw by measuring the diameter with a ruler at exactly 3/16” (0.190”).

Aliseda Astley

Pundit

How big is a #6 screw?

Screws have three basic measurements: gauge, threads per inch, and shaft length in inches. So, you may also see a measurement like 6-32 x 1 1/2". This means it's a #6 diameter, with 32 threads per inch (almost double the normal thread count as a standard wood screw) and an inch and a half long.

Shagufta Kerschgens

Pundit

What is a #10 screw?

The term 10-32 comes from Unified and American Screw Threads for Bolts, Nuts, and Machine Screws standards published by ANSI B1. 1-1974. The number “10” is simply a size designator with no numerical meaning. The number “32” refers to 32 threads per inch.

Erlan Turell

Pundit

What diameter is a No 8 wood screw?

Wood Screw Diameters
Size Major Thread Diameter*
Decimal Nearest Fractional Measurement
#6 .138" 9/64"
#7 .151" 5/32"
#8 .164" 5/32"

Povilas Wolrab

Pundit

What size screw is this?

This number will help you determine whether a screw will thread into a certain bolt properly. Screw size is measured in diameter. For example a 1/4-20 screw has 20 threads per inch and a diameter of 1/4 inch. All you need is a steel rule to determine the size and thread count of any screw.

Ashanti Lachica

Pundit

What is 8 gauge screw in MM?

Metric Imperial Screw Conversion Chart
Diameter (mm) Length (mm) Closest Imperial Size Gauge x Length
4mm 12 8 x 1/2
16 8 x 5/8
20 8 x 3/4
25 8 x 1

Garnett Schencker

Teacher

How do I measure screw size?

Length is measured from the point at which the head sits flat with the surface, to the tip of the threads. Hex, pan, truss, button, socket cap, and round head screws are measured from right under the head to the end of the threads. Flat head screws are measured from the top of the head to the tip of the threads.

Chesus Papen

Teacher

Is a #10 or #12 screw bigger?

You can identify a 10-32 screw by measuring the diameter at exactly 3/16″ (4.76 mm). 12-24 rack screws are more common than 10-32 in pre-threaded racks. They are slightly larger and courser than 10-32 hardware. The number “12” is a size designator with no numerical meaning.

Cleonice Pfaffengut

Teacher

How do you read screw sizes?

How to Read Screw Sizes
  1. Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread.
  2. Read the second number. This is either the number of threads per unit of the distance between threads; also known as the "thread pitch".
  3. Read the third number, generally the one following the "x."

Dioni Zemella

Teacher

What is 8 gauge in MM?

Ear Gauge to MM Conversion Table
Gauge Millimeters(mm) Inches
4g 5 mm 3/16"
2g 6 mm 1/4"
0g 8 mm 5/16"
00g 10 mm 3/8"

Pili Ehlhardt

Reviewer

What is an 8 32 screw?

What do the numbers - such as 8-32 mean on a machine screw? The first number is the diameter. The bigger the number the bigger the screw. The second number is the number of threads per inch.

Charley Pinal

Reviewer

What does a 10 32 mean?

10-32 threads are historically the original rack screw type. The term 10-32 comes from Unified and American Screw Threads for Bolts, Nuts, and Machine Screws standards published by ANSI B1. 1-1974. The number “10” is simply a size designator with no numerical meaning. The number “32” refers to 32 threads per inch.

Vanderlei Hosl

Reviewer

How long should wood screws be?

When screwing into the end grain, aim for at least two inches of thread in the board. As a general guideline, you can use #8 diameter deck-type screws for most utility tasks. Use 1-1/4 inch screws for basic tasks where strength is less of an issue or when attaching two 3/4-inch-thick boards across the grain.

Othmane Metcalfe

Reviewer

What is the most common screw size?

What's The Most Common Size? A screw's diameter is called its gauge. The most common gauges are between 2 and 16 in diameter. An 8-gauge screw is a good general-purpose size.