Engineered for high-performance applications, this M21 x 121mm Hex Head Cap Screw is manufactured from premium Aluminum 6061. Offering exceptional strength-to-weight ratio and corrosion resistance, it ensures reliable fastening in demanding environments.
| Standard | ISO 9001 |
| Material | Aluminum 6061 |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M21 |
| Length | 121mm |
| Head Width | 24mm |
Specified by design engineers worldwide, this M21 x 121mm Hex Head Cap Screw leverages the superior properties of Aluminum 6061-T6. Exhibiting a minimum tensile strength of 310 MPa and yield strength of 276 MPa, it provides robust structural integrity in a lightweight package. The M21 thread size ensures secure engagement, while the 121mm length and 24mm head width facilitate precise assembly and load distribution. Ideal for environments where corrosion resistance and weight reduction are paramount, such as aerospace, marine, and automotive sectors.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Ensure mating threads are clean and free of debris. 2. Hand-thread the screw to confirm proper engagement and avoid cross-threading. 3. Torque to manufacturer-specified values using calibrated tooling, considering the material properties of Aluminum 6061.
| 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) |
|---|---|---|
| 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 | Moderate |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Over-torquing the screw, which can strip the aluminum threads or deform the mating surface. | Always adhere to the recommended torque specifications for Aluminum 6061 fasteners, utilizing a torque wrench for accuracy. |
| Using steel fasteners in corrosive environments where aluminum is specified, leading to galvanic corrosion and premature failure. | Select fasteners made from the specified material (Aluminum 6061) to ensure compatibility and long-term performance in the intended environment. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace structural components, Marine equipment and fittings, Automotive chassis and body assembly, High-performance sporting goods.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||