Hot Products
0102030405
China Galvanized Hexagon Head Bolt Assemblies with Spring and Plain Washers - Reliable Suppliers & Factory Solutions
| Thread size d | M3 | M4 | M5 | M6 | M8 | M10 | M12 | |
| h ② | Public | 0.5 | 0.8 | 1 | 1.6 | 1.6 | 2.0 | 2.5 |
| H | Public | 2 | 2.75 | 3.25 | 4 | 5 | 6.25 | 7.5 |
| dc | Public | 7 | 9 | 10 | 12 | 16 | 20 | 24 |
| d2 | Reference | 5.23 | 6.78 | 8.75 | 10.71 | 13.64 | 16.59 | 19.53 |
| a | Max | 1.0 | 1.4 | 1.6 | 2.0 | 2.5 | 3.0 | 3.5 |
| 1,000 pieces of steel weigh ≈ kg | - | - | - | - | - | - | - | |
|
1. Other size reference — Bolts: GB 5783; Washers: GB 9074.24, GB 9074.26 2. M8, M10, M12 H values and GB 9074.24-88 corresponding values are not consistent. |
||||||||
⚙ Key Uses of Hexagonal Screw with Flat & Spring Washer Assembly
-
🛡1. Buffering Effect During mechanical operation, vibration, impact, or temperature changes can loosen screws or deform connecting parts. The cushioning effect of the spring washer and flat washer effectively reduces these issues, increasing connection reliability.
-
🔒2. Locking Action The bolt–spring washer and flat washer combination locks the position of connecting parts, keeping them correctly aligned and preventing movement due to external forces, ensuring tightness and stability of the connection.
-
🔧3. Reducing Damage to Connection Components Connecting parts under screw connections often experience stress. Adding a spring washer and flat washer helps absorb these stresses, reducing the load on connecting parts and avoiding potential damage.
-
🌎4. Wide Application Fields Hexagon head screw washer assemblies are widely used in construction, automotive, mechanical, electronic, and electrical industries. In daily life, they are also found in furniture assembly, electrical appliances, and more.
-
⚡5. Specific High-Precision Applications Hexagon head combination bolts are ideal for assemblies requiring high accuracy and capable of withstanding larger impact forces — such as body and engine installation in automotive manufacturing, mechanical component connections, and steel structure connections in construction.
📝 Summary: The hexagon screw with flat and spring washer is a versatile mechanical component primarily used to provide stable connection and buffering, and is widely applied across various industrial and civil fields.
⭐ Why Choose Us
✅ Genuine Guarantee
💰 Price Concessions
🏭 Factory Direct Sales
🏆 Quality Assurance
❓ Frequently Asked Questions (FAQ)
Q What is a hexagon head bolt with spring washer and flat washer assembly?
It is a pre-assembled combination of a hexagon head bolt, a spring (lock) washer, and a flat plain washer. This assembly is designed to provide secure fastening, vibration resistance, and load distribution in a single unit.
Q What sizes are available for this bolt assembly?
The standard thread sizes available are M3, M4, M5, M6, M8, M10, and M12. Each size has corresponding dimensional specifications for h, H, dc, d2, and a values as listed in the specifications table above.
Q What standards do these bolt assemblies comply with?
These assemblies reference Chinese national standards: bolts follow GB 5783, and washers follow GB 9074.24 and GB 9074.26. Please note that M8, M10, and M12 H values may differ from GB 9074.24-88 corresponding values.
Q In which industries are hexagon head bolt assemblies most commonly used?
They are widely used in the construction, automotive, mechanical engineering, electronics, and electrical industries. Common applications include vehicle body and engine installation, steel structure connections, mechanical component assembly, and furniture or appliance manufacturing.
Q Why is a spring washer used together with a flat washer?
The spring washer provides a locking function that prevents the bolt from loosening due to vibration or dynamic loads, while the flat washer distributes the clamping load evenly across the connected surface to prevent damage. Together, they ensure a more reliable and durable connection.
Q Can these bolt assemblies be used in high-impact or high-precision environments?
Yes. Hexagon head combination bolt assemblies are specifically recommended for applications requiring high assembly accuracy and the ability to withstand larger impact forces, such as automotive manufacturing, heavy machinery maintenance, and structural steel connections in construction projects.