Overview
Hollow Allen Bolts are specialized fasteners designed to provide secure and efficient fastening solutions in applications requiring internal access or fluid passage through the bolt. These bolts feature a hollow shaft combined with an Allen (hex socket) drive, allowing for torque application via an internal hex key while maintaining a lightweight structure. Manufactured using high-grade steel or stainless steel, Hollow Allen Bolts undergo precision machining and heat treatment processes to ensure optimal strength, corrosion resistance, and durability. Their unique design facilitates reduced weight without compromising mechanical integrity, making them suitable for industries such as automotive, aerospace, and machinery manufacturing where both strength and weight reduction are critical factors.
The performance of Hollow Allen Bolts is characterized by their ability to withstand high tensile loads while allowing for internal routing of cables, fluids, or gases through the hollow core, enhancing their versatility in complex assemblies. Their smooth internal bore and precise threading enable seamless integration with other components, ensuring reliable fastening under dynamic conditions. Applications often include hydraulic systems, pneumatic assemblies, and electronic enclosures where space constraints and functional efficiency are paramount. The advantages of Hollow Allen Bolts include improved assembly efficiency, reduced material usage, and enhanced design flexibility, making them an essential component in advanced engineering and manufacturing environments.
| Product Type | Hollow Allen Bolt |
| Head Style | Cylindrical Socket Head with Hollow Center |
| Manufacturing Process | Cold Forging and Precision Machining |
| Thread Type | Metric or Unified Coarse/Fine Threads |
| Common Materials | Alloy Steel, Stainless Steel, Carbon Steel |
| Available Sizes | M3 to M20 (Metric), #4-40 to 3/4-10 (Imperial) |
| Strength Features | High Tensile Strength, Corrosion Resistance (depending on material) |
| Typical Applications | Automotive, Aerospace, Machinery Assembly, Electronics |
| Surface Finishes | Zinc Plating, Black Oxide, Passivation, Phosphate Coating |
| Standards | ISO 4762, DIN 912, ANSI B18.3 |
| Customization | Custom Sizes, Materials, Threads & Surface Finishes Available |
Reduces overall assembly weight without compromising strength, ideal for aerospace and automotive applications where weight savings are crucial.
Available in stainless steel and coated carbon steel, providing excellent resistance to rust and environmental degradation.
Hex socket drive allows for precise torque application, ensuring secure fastening in critical assemblies.
Suitable for fluid passage, wiring, and weight-sensitive installations across various industries.
Produced with tight tolerances for consistent performance and fit in demanding environments.
Hollow core enables routing of cables or fluids, simplifying complex assembly requirements.
| Product Type | Hollow Allen Bolt |
|---|---|
| Thread Type | Metric Coarse and Fine |
| Diameter Range | M4 to M20 |
| Length Range | 10 mm to 150 mm |
| Available Materials | Stainless Steel, Carbon Steel, Alloy Steel |
| Manufacturing Standards | DIN 912, ISO 4762 |
| Surface Finish | Plain, Zinc Plated, Black Oxide |
| Diameter (mm) | Length (mm) | Hex Socket Size (mm) |
|---|---|---|
| M4 | 10–50 | 3 |
| M6 | 12–80 | 5 |
| M8 | 16–100 | 6 |
| M10 | 20–120 | 8 |
| M12 | 25–150 | 10 |
| M16 | 30–150 | 14 |
| M20 | 40–150 | 17 |
