Engineered for superior performance, this M20 x 21mm hex head cap screw is precision-crafted from lightweight and corrosion-resistant Aluminum 6061, offering exceptional strength for critical fastening applications.
| Standard | ISO 9001 |
| Material | Aluminum 6061 |
| Finish | Zinc Plated |
| Grade | N/A |
| Size | M20 |
| Length | 21mm |
| Head Width | 13mm |
Manufactured under strict quality controls, this M20 x 21mm hex head cap screw features a nominal diameter of M20 and a length of 21mm, with a head width of 13mm. Constructed from Aluminum 6061, it provides an excellent strength-to-weight ratio, superior corrosion resistance, and good machinability. This material is well-suited for applications requiring a balance of mechanical properties and environmental resilience, such as in aerospace components, marine hardware, and general structural assemblies where weight reduction is a key consideration.
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 from debris. 2. Hand-thread the screw to confirm proper engagement. 3. Tighten to the recommended torque specification using an appropriate wrench or socket, avoiding overtightening.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ISO 9001 |
| 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) |
|---|---|---|
| M20 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M20 | 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, potentially stripping threads or deforming the material. | Always adhere to the manufacturer's recommended torque values or consult engineering specifications for the appropriate tightening force. |
| Using the wrong tool size, leading to damage to the hex head and potential slippage. | Utilize a correctly sized wrench or socket that fits snugly on the hex head to ensure optimal force transfer and prevent damage. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace components requiring lightweight fasteners, Marine hardware exposed to corrosive environments, Lightweight structural assemblies in industrial machinery.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||