Engineered for superior performance, this M21 x 145mm Hex Head Cap Screw is crafted from high-strength Aluminum 6061. Its robust design ensures reliable fastening in diverse industrial environments, offering excellent corrosion resistance and a lightweight profile.
| Standard | ASTM A106 |
| Material | Aluminum 6061 |
| Finish | Passivated |
| Grade | N/A |
| Size | M21 |
| Length | 145mm |
| Head Width | 32mm |
Specified by design engineers worldwide, this M21 x 145mm Hex Head Cap Screw is manufactured from premium Aluminum 6061 alloy. This material offers an exceptional strength-to-weight ratio, superior corrosion resistance in various environmental conditions, and good machinability. The M21 metric thread size and 145mm length provide ample grip and reach for critical structural and mechanical assemblies. With a nominal head width of 32mm, it allows for secure engagement with standard tooling, facilitating efficient installation and disassembly in applications demanding reliability and reduced mass, such as aerospace, automotive, and marine structures.
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 from debris. 2. Hand-thread the screw to verify alignment and prevent cross-threading. 3. Tighten the screw to the specified torque value using a calibrated torque wrench, ensuring even pressure distribution across the joint.
| 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 | Moderate |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Over-torquing the aluminum screw, leading to thread stripping or material deformation. | Always consult the material's torque specifications or use a calibrated torque wrench to apply the correct tightening force. |
| Using the wrong size or type of wrench, which can damage the hex head or lead to incomplete tightening. | Utilize a correctly sized, high-quality hex socket or wrench that fits snugly to ensure proper engagement and prevent slippage. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace structural components, Automotive chassis and body assembly, Marine equipment and fittings, Lightweight machinery construction, Corrosion-resistant industrial fixtures.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||