4×12 Flat Screw

What is a 4 by 12 screw?

The typical angle of a countersunk screw head is 90 degrees. Screws Length= Head Height + Thread Length, e.g. M4 x 12mm flat head socket screw, the screws length is 12mm, head height is 2.3mm, thread length is 5.7mm. via

What size is M4 screw?

Common M4 Fastener Screw and Bolt Sizes - MonsterBolts

Type DIN Head Diameter
M4 Hex Bolts (FT) 933 7.66mm*
M4 Hex Bolts (PT) 931 7.66mm*
M4 Socket Head Cap 912 7.22mm
M4 Low Head Socket Cap 7984 7.0mm


What is a 12/24 machine screw?

The number “12” is used as a size designator with no numerical meaning. “24” references the 24 threads per inch. You can identify a 12-24 screw by measuring the diameter with a ruler at slightly less than 7/32 inches (5.6mm). via

What is a 3 56 screw?

#3-56 Stainless steel Knurled Head socket cap screws are bolts or machine screws with a Hex or Allen drive style. The term socket head cap screw typically refers to a type of threaded fastener whose head diameter is nominally 1.5 times or more that of the screw shank (major) diameter. via

How do you read screw numbers?

In the Unified Thread Standard (UTS) system, manufacturers list the diameter size as a number between 0 and 10, with 0 being the smallest and 10 being the largest. Screws larger than a #10 have a diameter listed directly in inches. For example, on a #4-40 UNC-3A x . 5 screw, #4 represents the diameter. via

What is an M4 screw?

The M4 machine screw has a thread diameter of 4 millimetres, in simple terms the M stands for millimetres followed by the size – in this case 4 mm. 12 products. See more Screws. via

What is the difference between M3 and M4 screws?

As a rule of thumb, the diameter of the clearance hole is more than the diameter of the screw. The M3 screw's clearance hole is either 3.5 or 3.2mm. The M4 screw has a clearance hole of at least 4.2mm. via

What size is M4 in inches?

Tap size Basic major dia (mm) Basic major dia (inch)
M3 x 0.5 3mm .1181
M3.5 x 0.6 3,5mm .1378
M4 x 0.7 4mm .1575
M5 x 0.8 5mm .1969


How do I measure screw size?

To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt. via

Is there a #12 machine screw?

3/4 in - #12 - Machine Screws - Screws - The Home Depot. via

What size is a number 12 screw?


Size Nearest Fraction Millimeter
#8 5/32 4.2
#10 3/16 4.8
#12 7/32 5.5


Are #12 machine screws common?

Fasteners (bolts, screws, etc.) that belong to the "inch" series are the most common in the U.S.A. and Canada.
Table 1.

Threads per Inch Pitch (inches) Pitch (mm)
14 0.0714 1.814
13 0.0769 1.954
12 0.0833 2.117
11 0.0909 2.309


What size is a number 4 screw?

A 4 gauge screw will have a head that is approximately 4mm wide. via

What do screw size numbers mean?

The first number is the diameter. The bigger the number the bigger the screw. The second number is the number of threads per inch. Check your state and local codes before starting any project. Follow all safety precautions. via

What are the different screw sizes?

Screw Sizes

For screws measured in inches, diameters of 1/4 inch and smaller (for machine and sheet metal screws) or 5/16 inch and smaller (for wood screws) are expressed with a # and a whole number (ex., a screw with a major diameter of 3/16 inch is a #10 screw). Smaller numbers indicate smaller diameters. via

Is the M4 a 4mm?

At the threaded bit, an M4 would be 4mm across. via

Is M4 a type of screw?

M4 - Machine Screws - Screws - The Home Depot. via

Are M4 screws machine screws?

M4 - 6 mm - Machine Screws - Screws - The Home Depot. via

How do I know if I have a M4 screw?

Do not measure the head of the bolt, measure the threaded part, outside of the threads. If your bolt is metric, then the diameter is stated using the letter "M". For example, if your bolt has a diameter of 4mm then it is called an 'M4 bolt' if your bolt is imperial then it will be measured in inches. via

Which is bigger M4 or M6?

The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters (millimeters is abbreviated "mm"). For nuts, size will appear as diameter and pitch.
Table 3.

Metric Closest Inch
M3.5-0.6 6-40 (Same)
M4-0.7 8-36 (Larger)
M5-0.8 10-32 (Smaller)
M6-1.0 1/4-28 (Larger)


What does the M mean in bolt sizes?

The letter 'M' indicates that this bolt uses a metric thread. The number '8' refers to the nominal diameter of the bolt shaft in millimeters. The number 1.0 is the thread pitch of the bolt, which is the distance between threads, in millimeters. And the final figure, 20, is the length in millimeters. via

Is M14 the same as 14mm?

M14 means it is metric with a 14mm outside diameter. via

What is a 4 40 screw in metric?

The closest size screw in metric to a #4-40 machine screw is M3. via

What are wood screw sizes?

Wood screws range in diameter from #0 to #24; the larger the number, the larger the size and, unlike wire gauge, #0 is the smallest screw size. Sizes from #2 to #14 are commonly available. via

What size screws are used to mount a TV?

The most common screw for securing the TV to the wall bracket is an M8 screw. The other screw sizes for some TVs are M4, M5, and M6. Here are 4 screw kits for mounting your TV to the wall mount bracket… The length of the screws will be in conjunction with the depth of your specific TV. via

What size is 6 gauge screw?

It is by coincidence that the gauge is approximately the size of the screw head in millimeters. A 6 gauge screw will have a head almost equal to 6 mm wide. via

Is a #12 screw the same as 1 4?

The diameters listed in the chart below are in fractions of an inch, so the #12 is just shy of 1/4 inch. via

What is the diameter of a 12 24 screw?

The number “12” is a size designator with no numerical meaning. The number “24” refers to 24 threads per inch. You can identify a 12-24 screw by measuring the diameter at slightly less than 7/32″ (5.55 mm). via

What diameter is a #10 machine screw?

0.190" 3/16"

Size Nominal Thread Diameter
Decimal Nearest Fractional
#8 0.164" 5/32"
#10 0.190" 3/16"
#12 0.216" 7/32"


What is the diameter of a #12 wood screw?

Screw Dimensions

"A" Flat Head "B" Body Dia
Size Max Min
12 0.438 0.165
14 0.507 0.190
Note: IFI Standards specify a tolerance on screw length of +0", −1/16".


What is a #14 screw?

#14: A Number 14 size (sheet metal screws, Teks screws, wood screws) 2. Basic Major Diameters of industry Numeric Size-denominated screws: (in inches) #0: 0.0600 or 3/50 in. via

How do you label a screw?

Think dress size. The bigger the number, the thicker the shank. 24 – Represents the number TPI, or the number of threads per inch. The higher the number, the finer the threads, which are best used in metal applications. via

What does UNC bolt mean?

When tapping bolts or threading screws, it's essential to know the proper thread size. There are two main kinds of threads in the Unified Screw Thread (UST) Standard—UNF and UNC. UNF is the designation for Unified Fine Threads. Meanwhile, UNC denotes Unified Coarse Threads. via

Is more threads per inch stronger?

The difference between fine and coarse thread

This can be defined as the distance between two threads on the shaft of the fastener. This is typically measured in threads per inch (TPI). A higher value TPI indicates a smaller thread pitch. A fastener with a fine thread equates to a fastener with a high TPI value. via

What size is 4 40 screw?

External Thread Screw Threads Size Chart

Screw Size Class Thread Major Diameter
4-40 2A 0.1120
4-40 3A 0.1120
4-48 2A 0.1120
4-48 3A 0.1120


What does GA mean in screws?

The gauge of a screw is defined by the thickness (diameter) of the un-threaded part of the screw known as the shank. via

Leave a Comment