This M20x81mm Brass Hex Head Cap Screw offers superior corrosion resistance and excellent electrical conductivity. Ideal for demanding industrial applications requiring reliable fastening.
| Standard | ISO 9001 |
| Material | Brass |
| Finish | Plain |
| Grade | N/A |
| Size | M20 |
| Length | 81mm |
| Head Width | 32mm |
A proven choice for industrial professionals, this M20x81mm Hex Head Cap Screw is engineered from high-grade brass, renowned for its excellent corrosion resistance, particularly in marine and chemical environments, and its non-sparking properties. The M20 thread provides robust mechanical strength, while the 81mm length offers significant grip and joining capability. With a substantial 32mm head width, standard hex drivers achieve optimal torque application, ensuring secure and reliable connections in a wide array of industrial assemblies and equipment.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Ensure mating threads are clean and free of debris. 2. Align the cap screw with the pre-drilled hole or tapped insert. 3. Hand-tighten to engage threads, then use an appropriate hex wrench to tighten to the specified torque. 4. Verify secure fastening without 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) |
|---|---|---|
| M20 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M20 | 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 wrench, leading to stripped hex heads. | Always use a wrench that precisely fits the 32mm head width for optimal leverage and to prevent damage. |
| Over-tightening brass screws, which can lead to thread stripping or material fatigue. | Adhere to recommended torque specifications for M20 brass screws; consult engineering drawings or material specifications. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Marine hardware and fittings, Electrical conductivity components, Corrosion-prone industrial machinery.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||