This M21 x 149mm hex head cap screw, crafted from high-strength Aluminum 6061, offers exceptional corrosion resistance and a superior strength-to-weight ratio for demanding industrial applications.
| Standard | ASME B18 |
| Material | Aluminum 6061 |
| Finish | Galvanized |
| Grade | N/A |
| Size | M21 |
| Length | 149mm |
| Head Width | 12mm |
Engineered for reliability and performance, this M21 x 149mm Hex Head Cap Screw is precisely manufactured from Aluminum 6061, a widely utilized alloy known for its excellent corrosion resistance, weldability, and moderate to high strength. The material's inherent lightness makes it ideal for weight-sensitive assemblies. The M21 nominal diameter and 149mm length provide substantial fastening capability, while the 12mm head width ensures adequate torque transfer for secure assembly in applications requiring robust yet lightweight joining solutions, such as aerospace, marine, and automotive manufacturing.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Ensure the mating threads are clean and free of debris. 2. Insert the cap screw through the components to be joined. 3. Tighten the cap screw to the specified torque using an appropriate wrench, avoiding over-tightening to prevent thread stripping or material deformation.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ASME B18 |
| Tensile Strength | Standard Commercial Spec |
| Yield Strength | Standard Commercial Spec |
| Hardness | Varies by specific batch |
| Bolt Size | Dry Torque (ft-lbs) | Lubricated Torque (ft-lbs) |
|---|---|---|
| M21 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M21 | Varies by dimension | Contact Sales |
| Environment | Rating |
|---|---|
| Indoor / Dry | Excellent |
| Outdoor / Exposed | Excellent |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Using excessive force during tightening, leading to stripped threads or damaged components. | Always adhere to the recommended torque specifications for the specific application and material combination. |
| Not cleaning mating threads before installation, which can affect torque readings and joint integrity. | Thoroughly clean all threads of both the screw and the receiving component prior to assembly. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace structural components, Marine fittings and hardware, Automotive chassis and body assembly.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||