The a325n bolt is the largest hexagon-headed socket head cap screw in metric. This size of this fastener was developed by British engineer James Bolts Limited to be used primarily for aircraft applications, but it is now also very commonly found on land vehicles and vessels

The “a325 bolt grade equivalent” is a type of bolt that is typically used for building structures. It has a hexagonal head and a threaded shank with a square cross-section. The head can be tightened by an electric wrench or with hand tools. The length of the shank ranges from 1/2 to 2 inches, with the most common being 3/4 inch.

Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength is an ASTM International standard for heavy hex structural bolts. It specifies the mechanical characteristics of bolts with diameters ranging from 12 to 12 inches (13 to 38 mm).

What is the difference between a325 and Grade 8 bolts in this case?

SAE grade 8 bolts are composed of a medium carbon alloy steel, while A325 bolts are normally constructed of a medium carbon steel (although they may be produced from an alloy). A325 bolts are substantially weaker than Grade 8 bolts. ASTM A490 is an ASTM standard with equivalent tensile qualities as grade 8.

How strong are A325 bolts in terms of tensile strength? The ASTM A325 standard specifies heat-treated steel heavy hex structural bolts with a minimum tensile strength of 120/105 ksi.

Furthermore, according to AISC, what are the permissible bolting methods?

The turn-of-nut technique (with or without match marking), calibrated wrench method, twist-off-type tension-control bolt method, and direct tension indicator method are all valid ways for obtaining pretension values for bolting. It is expected that each of these strategies is employed independently of the others.

What is the strength of a 1/2-inch bolt?

A 1/2-inch grade 8 bolt with 13 threads per inch, for example, has an effective stress-carrying cross section of 0.1419 square inches, hence the breaking load is 0.1419 (area susceptible to stress) x 150,000 (tensile strength) = 21,285 pounds.

Answers to Related Questions

Is a 10.9 Bolt more powerful than a Grade 8 Bolt?

Class 10.9 is a higher-strength version of class 8.8 that is often used in high-strength automotive applications. Class 10.9 resembles grade 8. A low-carbon steel that may be used in a variety of applications.

What is the tensile strength of a bolt?

Grade 8, denoted by six elevated dashes, is the strongest commercial-quality bolt; its medium-carbon alloy steel has been quenched and tempered to attain a tensile strength of 150,000 psi.

What is the composition of a Grade 8 bolt?


Are a325 bolts considered to be high-strength?

Bolts with a diameter of one inch or less have a minimum tensile strength of 120,000 PSI, while bolts with a diameter of more than one inch have a minimum tensile strength of 105,000 PSI. Because they are weaker than A490, some projects do not need the use of a structural bolt of Grade A490.

Are a307 bolts considered to be high-strength?

Because ASTM A307 bolts are not considered high-strength bolts, they are not allocated to a category. A325 and A490 bolts have ultimate tensile strengths of 120 and 150 ksi, respectively.

Is it true that Grade 8 bolts are the most powerful?

Grade G / 8th grade

Bolts in grades 8 and 8 have been hardened more than bolts in grades 5 and 5. As a result, they are more durable and are employed in high-demand applications like car suspensions. On the head of Grade 8 bolts, there are six equally spaced radial lines. Grade G is almost the same as Grade 8.

Is it true that all Grade 8 bolts are the same?

Bolts of various classes are made up of different metal alloys and so have varying mechanical qualities. Grade 8 bolts are constructed of medium carbon alloy steel that has been quenched and tempered. Grade 2 bolts, which are constructed of untempered carbon steel, are nearly twice as strong.

What is an a325 bolt’s grade?

Bolts of Grade A325 have a minimum tensile strength of 120,000 PSI and come in sizes ranging from 1/2 to 1-1/2 inch (for diameters higher than 1-1/2, ASTM A449 requirements should be consulted).

What is the definition of snug?

Snug tight is described as the tightness achieved by a guy exerting his complete effort with a standard podger spanner or a few impact wrench hits. The relative position of the bolt and nut is then marked using location markings. Finally, the bolts are tightened to the specified torque in Table 24.

Is it possible to reuse a325 bolts?

“Reuse: Galvanized ASTM A325 bolts and ASTM A490 bolts must not be reused. Plain finish ASTM A325 bolts may be reused with the approval of the Engineer of Record. Touching up or re-tightening bolts that may have been loosened as a result of the installation of neighboring bolts is not considered a reuse.”

What is the definition of a snug, tight joint?

“Snug tight” means “all of the plies in a connection have been pushed into firm contact by the bolts in the joint, and all of the bolts in the joint have been tightened enough to prevent the nuts from being removed without the assistance of a wrench.”

Is it possible to reuse high-strength bolts?

Bolts with a high strength that have not been exposed to severe pretension may be reused. Pre-tensioned high-strength bolts, on the other hand, may or may not be appropriate for reuse.

What kind of nut should I use with a325 bolts?

A325 Hardware Recommendation

Note: For use with A325 heavy hex structural bolts, nuts complying to A194 Grade 2H are a suitable replacement. A comprehensive set of standards may be found in the ASTM A563 Nut Compatibility Chart.

What does a bolt’s grade indicate?

When a bolt has a S grade, it can sustain a stress of 45 to 49.9 metric tonnes per 6.45 cm2. This rating, which is usually printed on the head of the bolt, is equivalent to a grade 8.8 bolt in terms of tensile strength.

Is it possible to galvanize Grade 8 bolts?

Table 1 shows that the ASTM A490, ASTM A354 grade BD, and SAE J429 grade 8 requirements are all vulnerable to hydrogen embrittlement and should not be hot-dip galvanized.

What is the purpose of A36 steel?

As previously stated, ASTM A36 is the most popular steel alloy. Most construction components, such as columns, beams, decking, and finish elements, are made of it. ASTM A36’s ductility prevents it from being utilized as a cable, and it should not be used as a reinforcing bar (rebar).

What is the maximum weight that a 3/4-inch bolt can support?

Bolt Strength SAE

Working Loads That Are Safe to Bolt (lbs) (Safe tensile load at 6,000 pounds per square inch) (Safe shear strength at 7500 psi load)
BoltDia(in) Iron Bolt with NF Thread Grade 2
1/4 200 370
5/16 340 575
3/8 510 830