Bolt Length Chart

June 17, 2024 Post a Comment

Bolt length chart

<table><tbody><tr class="ztXv9"><th rowspan="2" style="padding-left:0">Bolt Diameter</th><th colspan="2" style="text-align:center">Minimum Thread Length (in.) *</th></tr><tr><th>Bolts 6 inches and shorter</th><th>Bolts longer than 6 inches</th></tr><tr><td style="padding-left:0"><b>1/4"</b></td><td><b>3/4"</b></td><td><b>1"</b></td></tr><tr><td style="padding-left:0"><b>5/16"</b></td><td><b>7/8"</b></td><td><b>1-1/8"</b></td></tr><tr><td style="padding-left:0"><b>3/8"</b></td><td><b>1"</b></td><td><b>1-1/4"</b></td></tr></tbody></table>

How are bolt sizes measured?

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.

Does bolt length include the head?

Does the length measurement of a bolt include the head? In most cases, when specifying the length of a headed bolt, the thickness of the bolt head is not included. For instance, if you were to order a ¾” x 24” hex head bolt, the bolt would measure 24” from under the head.

What does M10 mean in bolt size?

M10-1.0 x 20 Taking a closer look at this description, let's explore its meaning: M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters. 20 = The fastener's length, in millimeters.

Can bolts be any length?

Is there a standard thread length for bolts? Depending on the type of bolt you are using the thread length can vary greatly. There is not an inclusive thread length standard that covers all fasteners. Depending on the applications, manufacturer, and a number of other factors the amount thread may change.

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.

What does 8.8 mean on a bolt?

So, in English, a Property Class 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of that nominal tensile strength, so 640 MPa.

What do bolt size numbers mean?

The size of a metric bolt is specified using pitch, diameter, and length in millimeters. For example, in M8-1.0*20, the “M” means the Metric thread designation, the digit 8 refers to the Nominal diameter (in millimeters), 1.0 refers to the pitch, and 20 refers to the length.

What does M16 bolt mean?

Metric bolts are made fractionally under their stated size, for instance an M16 bolt will have a shank diameter of typically 15.97mm. This means that a 16mm bolt will fit through a 16mm hole but to allow for misalignment between parts it is common practice to drill bolt holes slightly larger.

What is the nominal length of a bolt?

The nominal length of a screw is the length or size which is used to define the length of the fastener, it is the name of the screw size, and not necessarily the overall length of the component.

What is the grip length of a bolt?

Grip length refers to the unthreaded shank of the screw and it is measured from underneath the flange head to the beginning of threads.

How do I determine thread size?

Use a pitch gauge. And check the thread against each form until you find a match. Some fractional

Is M12 bigger than M10?

M10 male fasteners are usually 1.5 mm or 1.25 mm distance from crest to crest. M12 male fasteners are usually 1.75 mm or 1.5 mm crest to crest.

What is M5 bolt size?

M5 bolts are easy to fix and have a wide variety of applications. These 5mm thread bolts work with matching nuts and are available with a variety of different heads, meaning there will be something for every type of job.

What is M12 bolt size?

M12 x 170mm Hexagon Head Bolt.

Does bolt length matter?

Does length really matter? The length of a bolt and the number of threads has a bearing on proper tension. Most stretching occurs in the threaded portion of the bolt. Automotive engineers size bolts, to provide adequate stretch and substituting a different length can cause problems.

How far should a bolt go past the nut?

The industrial norm suggests that “a bolt should have two full threads beyond the nut”, one for thread engagement and one for tolerances.

Are longer bolts stronger?

Because it retains a higher percentage of the all-important clamping force, the longer bolt provides more stability and reliability. It stands to reason that longer bolts are also better at resisting fatigue and loosening, making them a better choice for all structures.