This M21x133mm brass hex head cap screw offers exceptional corrosion resistance and electrical conductivity. Designed for demanding industrial environments, it ensures reliable fastening in diverse applications.
| Standard | ISO 9001 |
| Material | Brass |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M21 |
| Length | 133mm |
| Head Width | 9mm |
A high-performance industrial component, this M21x133mm brass hex head cap screw features a 9mm head width, providing robust torque transmission. Manufactured from premium brass, it exhibits excellent resistance to corrosion and tarnishing, making it ideal for environments where moisture or chemical exposure is a concern. Its inherent electrical conductivity also makes it suitable for applications within electrical systems or where grounding is required. The precise M21 thread ensures secure mating with compatible nuts and tapped holes, guaranteeing a stable and durable connection in critical assemblies.
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 from debris. 2. Align the cap screw with the tapped hole or nut. 3. Apply appropriate torque using a suitable wrench, ensuring not to overtighten. 4. Visually inspect the connection for proper seating and stability.
| 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) |
|---|---|---|
| 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 |
|---|---|
| Using excessive torque, leading to thread stripping or fastener deformation. | Refer to torque specifications for the specific application and materials being joined. Use a calibrated torque wrench. |
| Using the wrong size wrench, which can damage the hex head and hinder proper tightening. | Always use a wrench that precisely fits the 9mm hex head to ensure optimal force transfer and prevent damage. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Electrical connectors and busbars, Marine hardware and fittings, Architectural elements exposed to elements.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||