This M21x19mm brass hex head cap screw offers superior corrosion resistance and excellent electrical conductivity. Its robust construction ensures reliable fastening for demanding applications.
| Standard | ISO 9001 |
| Material | Brass |
| Finish | Anodized |
| Grade | N/A |
| Size | M21 |
| Length | 19mm |
| Head Width | 27mm |
Built to exacting engineering tolerances, this M21x19mm hex head cap screw is manufactured from high-grade brass (typically UNS C26000 or equivalent), offering exceptional corrosion resistance and non-magnetic properties. The M21 nominal thread size ensures significant load-bearing capacity, while the 19mm length provides controlled engagement in medium-thickness materials. The 27mm head width facilitates secure tightening with standard hex tools, distributing load effectively across the mating surface. Its inherent conductivity makes it suitable for electrical grounding and connection points where traditional steel fasteners would be detrimental. Ideal for marine environments, chemical processing, and applications requiring aesthetic appeal.
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 wrench for the 27mm head width. 2. Ensure the mating threads are clean and free from debris. 3. Hand-thread the screw to confirm alignment before applying torque. 4. Tighten to the desired torque specification, avoiding over-tightening which can damage the brass threads or workpiece.
| 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, stripping brass threads. | Apply torque gradually and utilize a torque wrench to adhere to recommended specifications for brass fasteners. |
| Cross-threading the screw during installation. | Start the screw by hand to ensure proper thread engagement before using a tool. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Electrical connectors and grounding, Marine and coastal hardware, Decorative and architectural fixtures, Chemical processing equipment, Musical instrument assembly.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||