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Bolts manufactured to the ASTM A325 specification have a fixed thread length for a given diameter, which is often shorter than other grades of bolts. For example, a 3/4″ diameter A325 has 1-3/8″ of thread and a 1″ A325 has 1-3/4″ of thread, regardless of the overall length of the bolt.

How much thread is on a bolt?

Bolts that are longer than 6″ have a thread length of twice the diameter plus 1/2″. For example, a 1/2 x 6 hex bolt will have 1-1/4″ of thread, whereas a 1/2 x 6-1/2 hex bolt will have 1-1/2″ thread. In our experience, most “off the shelf bolts” that are longer than 12″ have 6″ of thread.

Can ASTM A490 heavy hex structural bolts be fully threaded? 2015 Update: Yes, ASTM A490 bolts can now be fully threaded. There is a supplemental provision in the F3125 specification that allows the bolt to be fully threaded as long as it is stamped with an “S”.

How do you measure A325 bolt?

The length of the bolt would need to be (3/8″ X 2) + 1 5/32″ = 1.90625″ rounding up on the size (increment by 1/4″ inch) would give us 3/4″ X 2″ A325 Structural Bolts.

What is the standard size of a bolt?

Metric Standard Thread Length for Bolts

Bolt Diameter (mm) Standard Thread Length (mm) *
Bolts 125mm and shorter Bolts longer than 125mm
10 26 32
12 30 36
14 34 40

What grade is a A325 bolt?

As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5. A grade 8 bolt would be one that meets ASTM A490 standards. The A325 bolt strength, or SAE grade 5 bolt strength, is usually used for structural bolting projects.

What are A325 bolts?

ASTM A325 Bolts

ASTM A325 structural bolts are heavy hex bolts made of medium carbon steel with a flat bearing surface, washer faced, and chamfered point. They are commonly used in structural steel joints in heavy construction and available in diameters ranging from 1/2” up to 1-1/2”.

What nuts go with A325 bolts?

Recommended Nuts and Washers

The recommended grade of nut for an ASTM A325 structural bolt is ASTM A563 Grade D, DH, or C. ASTM A194 2H is also an acceptable substitute. These ASTM grades are all high strength and go through a heat treating process required to develop their mechanical characteristics.

What lengths do M6 screws come in?

Standard Thread Length for Bolts | Metric

Bolt Diameter 125mm and Shorter Longer Than 125mm
M5 16 22
M6 18 24
M7 20 26
M8 22 28

Thread size is the actual measurement of the threads and the threads per inch (TPI). What is thread pitch diameter? The diameter of a screw thread measured from the thread pitch line on one side to the thread pitch line on the opposite side.

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What is ASTM A325 Type 1?

ASTM A325 Type 1 is a standard material specification for high strength carbon steel fasteners, for use in high tensile structural bolting and other general purpose applications.

What size is an m20 bolt?

Metric Hex Bolt Dimensions

NOMINAL SIZE (D) BODY DIAMETER
m12 12.00 11.73
m14 14.00 13.73
m16 16.00 15.73
m20 20.00 19.67

What is the tensile strength of A325 bolts?

Grade A325 bolts are available in diameters from 1/2 to 1-1/2 inch (for diameters greater than 1-1/2, ASTM A449 specifications should be considered) with a minimum tensile strength of 120,000 PSI.