Engineered for reliability, this M4 x 121mm Brass Hex Head Cap Screw offers superior corrosion resistance. Its robust design and precise dimensions ensure secure fastening in diverse environments.
| Standard | ISO 9001 |
| Material | Brass |
| Finish | Plain |
| Grade | N/A |
| Size | M4 |
| Length | 121mm |
| Head Width | 34mm |
Precision-manufactured to tight tolerances, this M4 x 121mm hex head cap screw features a substantial 34mm head width for enhanced torque application and surface contact. Constructed from high-grade brass (e.g., UNS C36000 / Brass 360), it exhibits excellent machinability, natural corrosion resistance, and non-sparking properties, making it ideal for environments where rust is a concern or where electrical conductivity needs to be mitigated. The M4 thread pitch conforms to international standards, ensuring compatibility with standard M4 nuts and tapped holes. This fastener is designed for applications requiring strength, durability, and aesthetic appeal where standard steel fasteners may be unsuitable.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Ensure the mating threads are clean and free of debris. 2. Hand-thread the cap screw to verify proper engagement and prevent cross-threading. 3. Using an appropriate hex key (Allen wrench) of the correct size, tighten the cap screw to the desired torque specification, ensuring even pressure distribution.
| 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 |
|---|---|
| Over-tightening the brass screw, which can lead to thread stripping or deformation. | Use a torque wrench and adhere to recommended torque values for M4 brass fasteners to prevent damage. |
| Using the wrong size hex key, resulting in cam-out and potential damage to the screw head. | Always select a hex key that precisely fits the hex socket of the cap screw. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Marine hardware and fittings, Electrical enclosures and components, Decorative and architectural 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. | ||||