What is the diameter of a bolt?

Table of Contents

What is the diameter of a bolt?

The diameter of a bolt is the Shank diameter, expressed in millimetres for Metric bolts. Because this is approximately the same as the Major or Thread diameter the thread diameter measurement can be used for fully threaded bolts.

What size is a GM 12 bolt rear end?

The GM 8.875-inch, 12-bolt positraction came in many 1965 to ’72 passenger cars. The pinion shaft on passenger cars’ differentials was 1.625 inches in diameter, and the cover was oval, measuring 10.9375 inches wide by 10.625 inches tall.

What size is M12?

Tap size Basic major dia (mm) Basic major dia (inch)
M10 x 1.25 10mm .3937
M12 x 1.75 12mm .4724
M12 x 1.25 12mm .4724
M14 x 2 14mm .5512

What does M12 mean on a bolt?

M12 x 25 = 12 mm diameter, coarse thread is assumed (1.75 mm), 25 mm long. M12 is a matching coarse threaded nut. (To avoid confusion, we always include the thread pitch for both coarse and fine metric fasteners.)

Is an M12 bolt 12mm?

Yes. M12 is a 12mm diameter thread. You have to be sure the thread pitch measured in threads per millimeter (1.5 here) is the same as what u need.

What size is an M8 bolt in inches?

Fastener Conversion Chart

Inch Equivalent Metric Size-PitchISO and IFI Rec.
1/4- 20 1/4- 28 M6x 1
5/16-18 5/16- 24 M8x 1.25
3/8-16 3/8- 24 M10x 1.5
7/16-14 7/16- 20 M12x 1.75

What are standard bolt sizes?

US Standard Thread Length for Bolts

Bolt Diameter Standard Thread Length (in.) *
Bolts 6 inches and shorter Bolts longer than 6 inches
1/4″ 3/4″ 1″
5/16″ 7/8″ 1-1/8″
3/8″ 1″ 1-1/4″

What size bolt is an M8?

Metric clearance and tapping drill hole sizes.

Size Clearance Hole mm Tapping Drill (std Pitch)
M6 6.5 5.0 mm
M8 9 6.75 mm
M10 11 8.5 mm
M12 14 10.25 mm

What size bolt should I use?

A typical rule of thumb . . . Use a bolt diameter that is 1.5 – 2.5 times (up to three times) the thickness of the thinner material you are bolting together. So, for 1/8″ material, a 1/4″ diameter is often a good bolt choice. For 1/4″ thick material, perhaps a 3/8″ or 1/2″ bolt.

What does a 6/32 thread mean?

The #6-32 UNC is a UTS screw specifying a major thread diameter of #6 which is defined as 0.1380 inches (3.51 mm); and 32 tpi (threads per inch) which equates to a thread pitch of 0.031250 inches (0.7938 mm). It is by far the most common screw found inside computer cases.

What is the thread size?

Thread sizes are given in nominal sizes, not in the actual measurement. The exact measurement is slightly below the named or nominal size. For example, a 6mm bolt may measure 5.8mm or 5.9mm, but it is called 6mm bolt.

How do you identify a thread?

  1. Determine if the thread is straight (parallel) or tapered. The thread is tapered if the diameter increases or decreases.
  2. Measure the thread diameter.
  3. Determine the number of threads per inch (TPI) or the pitch (metric threads) with the thread gauge.
  4. Determine the thread standard.

What do thread size numbers mean?

US fasteners specify threads per inch (TPI), commonly called thread count, so 20 would represent 20 threads per inch. Metric fasteners instead specify a thread pitch which is the distance between the threads. Therefore, a 1.5 pitch would have 1.5 millimeters between each thread.

Is a #8 or 10 screw bigger?

In the Imperial system of units, a number 10 machine screw (0.190 inch major diameter) is bigger than a number 8 machine screw (0.164 inch major diameter).

How thick is a number 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. A more detailed table with thread count can be found below, along with tap drill sizes.

Which thread class represents the loosest fit?

Class 1A

What is the most common thread size?

Common threads per inch sizes are: 4, 4-1/2, 5, 5-1/2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 20, 24, 28, 32, 36, 40, 48, 56, 72, 80. Most fasteners fall into coarse and fine categories, but there is also extra fine and other designations.

What is A and B in threads?

The ‘A’ designates an external thread, and ‘B’ designates an internal thread. • Classes 1A and 1B are considered an extremely loose tolerance thread fit. This class is suited for quick and easy assembly and disassembly.

What is the most common thread type?

Unified coarse / fine

What are the three basic types of threads?

Six Most Common Types of Threads

  • UN/UNF.
  • BSPP (BSP, parallel)
  • BSPT (BSP, tapered)
  • metric parallel.
  • metric tapered.

What are the three kinds of threads?

Thread Types

  • Cotton. Cotton threads are made from twisting the fine staples (fibers) from a cotton bowl to create a thread.
  • Corespun Polyester (also called poly-wrapped poly core)
  • Filament Polyester.
  • Monofilament Polyester.
  • Spun Polyester.
  • Rayon.
  • Nylon.
  • Metallic.

What does 6g thread mean?

Screws threads with identical external tolerances and pitch tolerances are expressed with a single tolerance letter and number. For instance, a screw with a 6g major diameter tolerance and a 6g pitch diameter tolerance would simply be written as “6g”.

What is G and H in thread?

“G” designates Ground Thread. “H” designates the pitch diameter is on high side of basic. These two letters (GH) are followed by a numeral indicating the Tolerance of Pitch diameter oversize.

What is G in screw size?

For gauge to MM conversion

Self Tapping Screw Gauge (g) Size (mm)
4 2.9
6 3.5
8 4.2
10 4.8

What does the H stand for on a tap?

H means (high) above basic pitch diameter and L (low) below basic pitch diameter. Tap limits have been established to provide a choice in the selection of the tap size best suited to produce the class of thread desired.

Which tool will cut external threads onto a bolt?

External threads, such as for bolts and studs, are made by using a tool called a DIE, which is applied to a specific diameter of rod for the size and pitch of the threads you want to cut. Both taps and dies can be used to either cut new threads or repair damaged threads.

What is a 6HX tolerance?

6HX: The additional letter “X“ (6HX) indicates taps produced with deviating tolerance to standard. These deviations are based upon the company standard. Taps produced to tolerance 6HX are, for example, selected for abrasive or tough materials.

Which tap do you use first?

There are times when a Plug tap can be used to start a thread without using a taper tap first if the Plug tap is started with a guiding center or fixture. In blind hole applications, Plug taps are used after a Taper to get closer to the bottom of the hole.

What is M12 thread size?

What size is an M8 bolt in MM?

Standard metric spanner and allen key sizes.

Size Spanner Allen Key
M8 13 mm 6 mm
M10 17 mm 8 mm
M12 19 mm 10 mm
M16 24 mm 14 mm

What size drill bit do I need for an M12 anchor bolt?

20mm drill bit

What size hole do you drill for a 12mm Dynabolt?

Product range

Item Description Anchor Thread Diameter (Metric) Drill Hole Diameter
M10 x 59mm M10 12 mm
M10 x 75mm M10 12 mm
M10 x 105mm M10 12 mm
M12 x 110mm M12 16 mm

What size drill bit do I need for a 10mm DynaBolt?

Brand Name Ramset
Drill Bit Size 10 mm
Length 45 mm
Packaging 50/Pack
Wall Thickness 8 mm

What size drill bit should I use?

Use a bit 1/64” smaller than the target hole size for softwoods. Use a bit exactly the same size as the hole when working on other materials. If you’re not sure which to select, choose a drill bit 1/64” larger than the hole you wish to create.

What size drill bit do I need for an M6 anchor bolt?


What size drill bit do you need for a M8 anchor bolt?


What size drill bit do I need for a 10mm bolt?

Metric Tap and Drill Bit Size Table

Tap Metric Drill US Drill
10mm x 1.25 8.9mm 11/32″
10mm x 1.0 9.1mm
12mm x 1.75 10.5mm
12mm x 1.5 10.7mm 27/64″

What size drill bit do I need for a 5/16 bolt?


Is a 3/8 drill bit the same as 10mm?

3/8″ bits have a nominal size being just ever so slightly under 10mm. You can’t drill a hole of any size and put something in it the same size. It must be a bit smaller than the hole you drill.

What size drill bit do I need for a 5’8 bolt?

To Tap This Size Screw Or Bolt: Use This Drill Bit: Decimal Inches
9/16-18 NF 33/64″ .5156
5/8-11 NC 17/32″ .5312
16mm-2.00mm 14.2mm .5590
5/8-18 NF 37/64″ .5781

What size hole do you drill for a 3/8 bolt?

US Tap and Drill Bit Size Table

Tap Fractional Drill Bit Letter Drill Bit
5/16″-18 17/64″ F
5/16″-24 I
3/8″-16 5/16″
3/8″-24 21/64″ Q

How deep do concrete anchors need to be?

1/4 in

How long do anchor bolts need to be?

J-bolt anchoring bolts come in many different lengths, the most common are 6, 8, and 12 inches long. These bolts are threaded at the top, for about two inches, and the rest of the bolt is smooth.