A robust M20 x 149mm brass hex head cap screw, offering superior corrosion resistance and aesthetic appeal. Engineered for reliable fastening in demanding environments.
| Standard | DIN 933 |
| Material | Brass |
| Finish | Galvanized |
| Grade | N/A |
| Size | M20 |
| Length | 149mm |
| Head Width | 30mm |
Specified by design engineers worldwide, this M20 x 149mm brass hex head cap screw boasts a nominal thread diameter of 20mm and a total length of 149mm. The hex head measures 30mm across flats, facilitating secure torque application with standard tooling. Constructed from high-quality brass (typically UNS C36000 or equivalent), it exhibits excellent machinability, good tensile strength, and exceptional resistance to corrosion, particularly in marine, chemical, and humid environments. Its non-magnetic properties also make it suitable for sensitive electrical applications.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select appropriate torque wrench and socket matching the 30mm head width. 2. Ensure mating threads are clean and free of debris. 3. Apply consistent, controlled torque to achieve desired clamping force without over-tightening.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | DIN 933 |
| 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 | Excellent |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Using incorrect torque, leading to thread stripping or insufficient clamping. | Refer to torque specifications for brass fasteners of this size and material, or use a calibrated torque wrench. |
| Cross-threading during installation due to misalignment. | Carefully align the screw with the tapped hole or nut before engaging the threads, and start tightening by hand. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Marine hardware and fittings, Electrical connectors and enclosures, Decorative architectural elements, Plumbing and HVAC systems.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||