The tensile load a fastener can withstand is determined by the formula P = St x As. To find the tensile strength of a particular bolt, you will need to refer to Mechanical Properties of Externally Threaded Fasteners chart in the Fastenal Technical Reference Guide.
How much load can a bolt hold?
For example, an eye bolt with a 1/4 inch shank can typically hold up to 600 pounds at a straight pull (no angle). However, at a 15 degree angle, the maximum weight capacity drops to 480 pounds (80% of the “straight pull” weight capacity).
How is bolt proof load calculated?
In a proof load test, a headed bolt is placed in a testing machine with a nut on the threaded end, and a wedge under the head.The bolt length is measured, and after being subjected to the published proof load value for 10 seconds, if it has not elongated more than 0.0005″, it is deemed to have passed.
How much weight can a M10 bolt hold?
For example, a grade 12.9 bolt will not snap until every square millimetre of the bolt cross section is carrying a load of at least 120 kg.
| Size | Pitch (std) | Pitch (fine) |
|---|---|---|
| M6 | 1.0 | 0.75 |
| M8 | 1.25 | 1.0 |
| M10 | 1.5 | 1.0 or 1.25 |
| M12 | 1.75 | 1.5 |
How is bolt shear capacity calculated?
The shear strength of all bolts = shear strength of one bolt x number of bolts • The bearing strength of the connecting / connected plates can be calculated using equations given by AISC specifications. The tension strength of the connecting / connected plates can be calculated as discussed earlier in Chapter 2.
How much weight can a 1/2 inch bolt hold?
Proof Load
| Nom Bolt Size (in) | Grade | |
|---|---|---|
| 2 | 5 | |
| 7/16 | 5850 | 9050 |
| 1/2 | 7800 | 12100 |
| 9/16 | 10000 | 15500 |
How much weight can a 3/8 inch bolt hold?
A 3/8-inch bolt of this type is rated to 7,000 pounds in 6,000 psi concrete (basically granite) and 4,000 pounds in 2,000 psi concrete (hard sandstone). This is roughly the breaking strength range of carabiners and much higher than any rope’s maximum possible impact force.
What is bolt load?
Bolt loads model tightening forces or length adjustments in bolts or fasteners. For example, Figure 1 shows a container (A) that is sealed by tightening the bolts that hold the lid, which places the gasket under pressure.
How do you calculate the yield strength of a bolt?
Yield Strength
Take the minimum yield in psi of the ASTM grade (see our Strength Requirements by Grade Chart for this value), multiplied by the stress area of the specific diameter (see our Thread Pitch Chart). This formula will give you the ultimate yield strength of that size and grade of bolt.
How do you determine the weight of a bolt?
The weight is calculated by multiplying the volume of the product by its density. The density of the material varies from material to material. The density of the 304 grade steel is 7.85 grams per centimeter cube, that of super duplex grades is 7.8 and of Nickel 200 alloy is 8.89.
How do I choose a bolt 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.
What does 8.8 mean on a bolt?
In the case of a 8.8 grade bolt the first figure signifies that the Tensile Strength is at least 800MPa. The second figure signifies that the fastener will begin to yield at 80% of the Ultimate Tensile Strength, i.e. at least 640MPa.
What is the shear strength of 1/4 bolt?
Material Strength – 60,000 psi J82 60M or Grade 1 or Class 4.8
| Size | Dia. | Proof Load Str. Lbs |
|---|---|---|
| 10-32 | 0.1900 | 660 |
| 1/4-20 | 0.2500 | 1,049 |
| 1/4-28 | 0.2500 | 1,200 |
| 5/16-18 | 0.3125 | 1,729 |
How is clamp load calculated?
Clamp load (lb.) is calculated by arbitrarily assuming usable bolt strength is 75% of bolt proof load (psi) times tensile stress area (sq. in.) of threaded section of each bolt size. Higher or lower values of clamp load can be used depending on the application require- ments and the judgement of the designer.
How strong is a 10mm bolt?
10mm-1.5 Class 10.9 Hex Bolt (coarse thread)
| Class: | 10.9 | 931/933 |
|---|---|---|
| Material: | Steel | 1.50 |
| Head Style: | Hex | 40mm |
| Yield Strength, psi: | 136,300 | 17mm |
| Tensile Strength, psi: | 150,800 |
What do 3 lines on a bolt head mean?
The markings can identify the standard to which the bolt was made. For instance, if a bolt head contains three radial lines, then it’s a Grade 5 bolt. If it contains five radial lines, then the bolt is Grade 8.
How much weight can a 3/16 bolt hold?
Strongest and most secure of all hollow-wall anchors. Holds up to two times more than wing toggles of the same bolt diameter: up to 802 Lbs. in concrete block and up to 238 Lbs. in 1/2-in drywall with 3/16-24 x 2-1/2-in bolt included in package.
How much weight can a Grade 8 1 4 bolt hold?
The tensile strength of a grade 8 bolt is 150,000 pounds per square inch. Tensile strength is the maximum load in tension (stretching) that a part can carry without breaking.
How strong is a grade 8 bolt?
The nominal size of the grade 8 bolts can be from 1/4″ to 1 1/2″. The minimum yield strength of this grade bolt is 130,000 psi. A maximum of 120,000 psi of tensile force (proof load) can be applied to grade 8 bolts.
What is strength of bolt?
The yield strength of a bolt can be defined as the tensile force that will produce a certain amount of permanent deformation within a specific fastener.
How is bolt preload calculated?
The Bolt Torque & Preload calculator can be used to calculate the torque required to achieve the desired preload on a bolted joint. See the reference section for details on the methodology and the equations used. How to specify preload?
Nominal Preload.
| KT | = | 0.200 |
|---|---|---|
| dnom | = | 0.2500 in |
| FPL | = | 426.4 lbf |
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