Engineered for demanding environments, this M21 x 40mm Aluminum 6061 hex head cap screw provides exceptional strength-to-weight ratio and superior corrosion resistance. Its precise dimensions ensure reliable fastening in diverse industrial settings.
| Standard | ASTM A106 |
| Material | Aluminum 6061 |
| Finish | Galvanized |
| Grade | N/A |
| Size | M21 |
| Length | 40mm |
| Head Width | 19mm |
Manufactured under strict quality controls, this M21 x 40mm hex head cap screw is forged from high-grade Aluminum 6061, renowned for its excellent corrosion resistance, moderate to high strength, and good weldability. The M21 nominal diameter and 40mm length, combined with a 19mm head width, meet stringent industrial standards. This alloy's inherent properties make it ideal for applications requiring lightweight solutions without compromising structural integrity, such as in aerospace, marine, and automotive sectors where weight reduction and resistance to environmental degradation are paramount.
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. Hand-thread the screw to verify alignment and prevent cross-threading. 3. Tighten using a properly sized wrench to the specified torque, avoiding overtightening.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ASTM A106 |
| 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 the wrong size wrench, leading to stripped heads. | Always use a wrench that precisely fits the 19mm hex head to ensure proper torque application and prevent damage. |
| Over-tightening, which can strip threads or damage the aluminum material. | Refer to torque specifications for Aluminum 6061 fasteners of this size to prevent material failure and ensure joint integrity. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace structural components, Marine hardware and fittings, Automotive assemblies requiring lightweight fasteners.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||