This M21x50mm hex cap screw, crafted from robust Aluminum 6061, offers exceptional strength-to-weight ratio and superior corrosion resistance. Featuring a 34mm head width, it ensures secure and reliable fastening for a wide range of demanding applications.
| Standard | ASME B18 |
| Material | Aluminum 6061 |
| Finish | Zinc Plated |
| Grade | N/A |
| Size | M21 |
| Length | 50mm |
| Head Width | 34mm |
Engineered for reliability and performance, this M21x50mm hex head cap screw is manufactured from high-strength Aluminum 6061-T6 alloy, renowned for its excellent corrosion resistance, weldability, and moderate mechanical properties. The M21 thread provides substantial load-bearing capacity, while the 50mm length accommodates various joint thicknesses. The 34mm hex head allows for secure torque application using standard tooling, preventing stripping and ensuring a tight, stable connection. Ideal for environments where weight reduction and resistance to oxidation are critical, such as aerospace, automotive, and marine industries.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Clean both the threaded hole and the screw threads to remove any debris or contaminants. 2. Apply a suitable lubricant or anti-seize compound to the threads if recommended for the application to prevent galling. 3. Insert the screw into the designated hole and thread it by hand for the first few turns to ensure proper alignment. 4. Using an appropriate wrench or socket, tighten the hex head to the recommended torque specification for the M21 thread size and the Aluminum 6061 material, avoiding over-tightening.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ASME B18 |
| 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 |
|---|---|
| Over-tightening aluminum fasteners | Always adhere to the manufacturer's recommended torque specifications. Over-tightening can strip the threads or damage the material, compromising joint integrity. |
| Not using anti-seize with aluminum | When joining aluminum to other metals, especially dissimilar ones, use an appropriate anti-seize compound to prevent galvanic corrosion and galling, which can seize the fastener. |
| Using incorrect tooling | Ensure the wrench or socket used fits the 34mm hex head precisely to avoid rounding the corners and to apply torque effectively and safely. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Lightweight structural assemblies in aerospace and automotive, Corrosion-resistant fixtures in marine environments, High-performance bicycle components, General purpose fastening requiring good strength and low weight.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||