What is an L9 bolt?
The L-9 Hex Head Bolt is part of the L-9 Fastening System that is designed for high stress and severe service environments. This system consists of the L9 hex bolt, 2 L9 washers, L9 hex nut, and/or L9 hex locknut.
Is a 10.9 bolt stronger than Grade 8?
Class 10.9 is stronger than class 8.8. It is commonly found in high strength automotive applications. Class 10.9 is similar to grade 8.
What does 10 9 mean on a bolt?
For the 10.9 bolt, the 9 tells the user that the yield strength of the bolt is approximately 90% of the first number: 1,000 MPa. Thus, the 10.9 bolt has an approximate yield strength of 900 MPa (940 MPa by specification).
What is Lamalloy?
“Lamalloy L-9” is a proprietary alloy steel material heat treated that is somewhat ‘stronger’ than Grade 8.
What does a 7 on a bolt mean?
Many metric automotive bolts are stamped with numbers creating a lot of confusion as to the actual grade (hardness) of the bolt. We see bolts with a 9, or a 7, perhaps even a 10 stamped in the head. 10.9 Equivalent to our American Grade 8 hardness. PSI tensile strength of 150,000.
Is Grade 8 or 12.9 stronger?
A head with no markings is Grade 2, one with 3 lines spaced 120 degrees is Grade 5, and 6 lines spaced at 60 degree intervals is Grade 8….Table 1.
| Grade/Class | Strength |
|---|---|
| Metric Class 10.9 | Similar to Grade 8. |
| Metric Class 12.9 | The highest metric class for strength, it exceeds Grade 8. |
What grade bolt is the strongest?
Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI.
How much weight will a 3/8 bolt hold?
How strong is a 3/8 bolt? 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).
How strong is ASTM F835?
Mechanical PropertiesAlloy Steel Flat Socket Cap Screw
| Quenched & Tempered Alloy Steel | Per ASTM F835-16 | |
|---|---|---|
| Nominal Diameter | Full-Size Screws | Product Hardness |
| Tensile Strength | Vickers DPH | |
| ksi | ||
| 1/2″ & under | 145 min | 382-434 |
Is the L-9 head bolt a high stress bolt?
The L-9 Hex Head Bolt is part of the L-9 Fastening System that is designed for high stress and severe service environments.
Which is part of the L-9 fastening system?
The L-9 Hex Head Bolt is part of the L-9 Fastening System that is designed for high stress and severe service environments. This system consists of the L9 hex bolt, 2 L9 washers, L9 hex nut, and/or L9 hex locknut.
Which is stronger grade 8 or L9 hex bolt?
This system consists of the L9 hex bolt, 2 L9 washers, L9 hex nut, and/or L9 hex locknut. The L-9 system is 20% stronger than the grade-8 bolt and it’s special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods.
What is the proof load of a L9 bolt?
The proof load means the force required to deform or strip the threads. A ¼-20 L9 bolt has a proof load of 4,610 lbs., while a 1-inch, eight-thread bolt has a proof load of 87,870 lbs. Yield strength refers to the force required to permanently deform, without breaking, the bolt.
