Engineered from robust Aluminum 6061, this M21x116mm hex head cap screw offers superior strength-to-weight ratio. Ideal for demanding applications requiring reliable fastening and corrosion resistance.
| Standard | ISO 9001 |
| Material | Aluminum 6061 |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M21 |
| Length | 116mm |
| Head Width | 20mm |
Specified by design engineers worldwide, this M21x116mm hex head cap screw is manufactured from premium Aluminum 6061-T6 alloy, renowned for its excellent corrosion resistance and moderate to high strength. The material exhibits good weldability and formability, making it suitable for a wide range of environmental conditions. With a nominal thread diameter of M21, a length of 116mm, and a head width of 20mm, it meets stringent industry standards for precision and performance in critical structural assemblies, marine hardware, and automotive components.
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-tighten the screw to verify thread engagement. 3. Torque to specified value using a calibrated torque wrench, avoiding over-tightening to prevent stripping or material deformation.
| 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 aluminum screw, leading to stripped threads or compromised material integrity. | Always use a calibrated torque wrench and adhere to the manufacturer's or design engineer's recommended torque specifications for Aluminum 6061 fasteners. |
| Using the screw in highly corrosive environments without considering potential galvanic corrosion if mated with dissimilar metals. | When joining Aluminum 6061 screws with other metals, consult galvanic series charts and consider appropriate isolation methods or compatible materials. |
A: This Hex Head Cap Screw, Aluminum 6061 is manufactured from Aluminum 6061.
A: Aerospace structural components, Automotive chassis and engine assemblies, Marine hardware and boat building, Industrial machinery and equipment.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||