Engineered for precision and durability, this M4x21mm Brass Hex Head Cap Screw offers superior corrosion resistance and aesthetic appeal. Ideal for demanding environments.
| Standard | ISO 9001 |
| Material | Brass |
| Finish | Anodized |
| Grade | N/A |
| Size | M4 |
| Length | 21mm |
| Head Width | 23mm |
Manufactured under strict quality controls, this M4x21mm Hex Head Cap Screw is crafted from high-grade brass, ensuring excellent corrosion resistance, non-magnetic properties, and good electrical conductivity. The M4 thread size and 21mm length provide precise fastening capabilities, while the substantial 23mm head width allows for secure torque application using standard hex tools. This alloy is particularly well-suited for applications exposed to moisture, chemicals, or where electrical insulation is not a primary concern, and where visual appeal is beneficial.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select the appropriate hex key (typically 3mm for M4). 2. Align the screw with the pre-tapped hole or nut. 3. Thread the screw in by hand to avoid cross-threading. 4. Tighten with the hex key to the desired torque, avoiding over-tightening.
| 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 |
| Copper (Cu) | 60.0 - 63.0% |
| Zinc (Zn) | Balance |
| Lead (Pb) | 2.5 - 3.7% |
| Bolt Size | Dry Torque (ft-lbs) | Lubricated Torque (ft-lbs) |
|---|---|---|
| M4 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M4 | Varies by dimension | Contact Sales |
| Environment | Rating |
|---|---|
| Indoor / Dry | Excellent |
| Outdoor / Exposed | Moderate |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Using the wrong size hex key, leading to cam-out and potential damage to the screw head. | Always use the specified hex key size for the screw's drive type and size. |
| Cross-threading due to misalignment during initial insertion. | Start threading by hand to ensure proper engagement of the threads before applying any torque. |
| Over-tightening, which can strip the threads or damage the material being fastened. | Tighten until snug, then apply a final quarter to half turn, or use a torque wrench if precise torque is critical. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Marine hardware and fixtures, Electrical connectors and enclosures, Decorative elements and trim, Corrosive environment fastening.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||