This M5 x 21mm Hex Head Cap Screw, crafted from premium Aluminum 6061, offers superior strength-to-weight ratio and excellent corrosion resistance. Its precise dimensions and robust design ensure secure fastening in critical applications.
| Standard | DIN 933 |
| Material | Aluminum 6061 |
| Finish | Plain |
| Grade | N/A |
| Size | M5 |
| Length | 21mm |
| Head Width | 20mm |
Engineered for reliability and performance, this M5 x 21mm Hex Head Cap Screw is manufactured from Aluminum 6061, a high-strength alloy renowned for its excellent corrosion resistance and machinability. The M5 thread size ensures compatibility with standard metric components, while the 21mm length provides ample engagement for secure joining. The 20mm head width, coupled with the hex socket drive, allows for high torque application with standard tools. This combination of material properties and precise dimensions makes it ideal for weight-sensitive applications, including aerospace structures, automotive components, marine hardware, and general industrial assemblies where both strength and reduced mass are paramount.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select the appropriate tool (e.g., Allen wrench) matching the M5 hex socket size. 2. Align the screw with the threaded hole or nut. 3. Hand-thread the screw to ensure proper engagement and prevent cross-threading. 4. Tighten the screw to the manufacturer's recommended torque specification for Aluminum 6061, avoiding over-tightening.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | DIN 933 |
| 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) |
|---|---|---|
| M5 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M5 | Varies by dimension | Contact Sales |
| Environment | Rating |
|---|---|
| Indoor / Dry | Excellent |
| Outdoor / Exposed | Moderate |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Cross-threading the screw due to misaligned installation. | Always hand-thread the screw for the first few turns to confirm proper alignment before applying torque. |
| Over-tightening the fastener, which can strip the threads or deform the mating material. | Use a torque wrench and adhere to the recommended torque values for the specific application and material. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace and aviation components, Automotive sub-assemblies, Marine hardware and fittings, Lightweight structural assemblies, Electronic enclosures.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||