Engineered for superior performance, this M20 x 139mm Hex Head Cap Screw is crafted from robust Aluminum 6061. It offers exceptional strength-to-weight ratio and corrosion resistance for critical industrial applications.
| Standard | ASME B18 |
| Material | Aluminum 6061 |
| Finish | Zinc Plated |
| Grade | N/A |
| Size | M20 |
| Length | 139mm |
| Head Width | 15mm |
Designed for demanding industrial environments, this M20 x 139mm Hex Head Cap Screw features a nominal diameter of 20mm and a length of 139mm, with a precisely machined 15mm hexagonal head for secure torque application. Constructed from Aluminum 6061, it provides excellent tensile strength and fatigue resistance while maintaining a lightweight profile, making it ideal for aerospace, automotive, and structural assembly where corrosion resistance and reduced mass are paramount. Its alloy composition ensures compatibility with various joining techniques and offers good machinability.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Ensure mating surfaces are clean and free from debris or contaminants. 2. Hand-thread the cap screw into the corresponding threaded hole to avoid cross-threading. 3. Tighten the cap screw using a calibrated torque wrench to the manufacturer's specified torque value for the application, ensuring proper preload without over-stressing the material.
| 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) |
|---|---|---|
| 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 which can strip threads or damage the fastener/mating component. | Always use a calibrated torque wrench and adhere to recommended torque specifications for the specific application and materials involved. |
| Cross-threading the fastener by not starting it straight or by forcing it. | Initiate thread engagement by hand, ensuring the screw enters the hole smoothly and perpendicularly before applying any rotational force. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace structural components, Automotive chassis and body assembly, High-performance machinery and equipment fabrication.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||