Engineered for exceptional corrosion resistance and non-magnetic properties, this M21 x 127mm brass hex head cap screw is ideal for harsh industrial settings where galvanic corrosion is a concern.
| Standard | ASTM A106 |
| Material | Brass |
| Finish | Galvanized |
| Grade | N/A |
| Size | M21 |
| Length | 127mm |
| Head Width | 8mm |
Designed for demanding industrial environments, this M21 x 127mm hex head cap screw is fabricated from high-quality brass, offering superior resistance to corrosion, tarnishing, and a wide range of chemicals. Its non-magnetic properties make it suitable for sensitive electrical and electronic assemblies. The M21 thread standard ensures robust engagement, while the 127mm length provides ample reach for various assembly requirements. The 8mm head width is optimized for standard wrench engagement, facilitating secure tightening and loosening during maintenance or assembly processes.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select an appropriately sized wrench that fits the 8mm hex head. 2. Align the M21 threads of the cap screw with the corresponding tapped hole or nut. 3. Apply steady, even torque to the hex head to engage the threads. 4. Continue tightening until the desired clamping force is achieved, avoiding overtightening which can damage threads.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ASTM A106 |
| 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 | Excellent |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Using excessive force, leading to thread stripping or fastener breakage. | Utilize a torque wrench to ensure the screw is tightened to the manufacturer's recommended torque specification, or apply firm, consistent pressure without over-exertion. |
| Cross-threading the screw by not properly aligning the threads before applying torque. | Initiate thread engagement by hand for several turns to confirm proper alignment before using a wrench. If resistance is felt, back out and re-align. |
A: This Hex Head Cap Screw, Brass is manufactured from Brass.
A: Marine hardware and fittings, Chemical processing equipment, Electrical enclosures and connectors, Food processing machinery, 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. | ||||