This M21 x 127mm Hex Head Cap Screw, crafted from high-quality brass, provides exceptional corrosion resistance and electrical conductivity. Ideal for environments requiring non-sparking properties and aesthetic appeal.
| Standard | ISO 9001 |
| Material | Brass |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M21 |
| Length | 127mm |
| Head Width | 10mm |
Engineered for reliability and performance, this M21 x 127mm Brass Hex Head Cap Screw features a robust design for secure fastening. The brass material offers excellent machinability, inherent corrosion resistance against many chemicals and environments, and non-magnetic properties, making it suitable for sensitive applications. Its hexagonal head profile ensures a strong grip for torque application with standard tooling, while the M21 thread size and 127mm length provide significant clamping force and reach. Head width is precisely 10mm for compatibility with common wrench sizes.
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. Hand-tighten the screw to verify thread engagement and alignment. 3. Use an appropriate wrench or socket to tighten the screw to the desired torque specification, avoiding overtightening.
| 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 force, leading to thread stripping or screw breakage. | Always adhere to recommended torque specifications for the specific application and mating material. |
| Using incompatible tools that can damage the hex head. | Utilize correctly sized, high-quality sockets or wrenches to ensure proper engagement with the hex head. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Electrical connectors and housings, Marine hardware and fittings, Decorative and architectural 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. | ||||