This M21 x 32mm Polycarbonate Hex Head Cap Screw offers superior corrosion resistance and excellent electrical insulation properties, making it ideal for demanding environments.
| Standard | ASME B18 |
| Material | Polycarbonate |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M21 |
| Length | 32mm |
| Head Width | 34mm |
Specified by design engineers worldwide, this M21 x 32mm Hex Head Cap Screw is manufactured from high-performance polycarbonate, ensuring exceptional chemical resistance and dielectric strength. Its M21 thread size and 32mm length provide robust fastening capabilities, while the 34mm head width allows for secure torque application with standard tools. Polycarbonate's inherent toughness and UV stability make these screws suitable for outdoor applications and environments requiring non-conductive materials, such as electronics assembly and chemical processing equipment.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select the appropriate mating component with a tapped hole or nut for the M21 thread. 2. Hand-tighten the cap screw to ensure proper thread engagement and alignment. 3. Use a calibrated torque wrench to tighten the screw to the specified torque value for the application, avoiding over-tightening to prevent thread stripping or material deformation.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ASME B18 |
| Tensile Strength | Standard Commercial Spec |
| Yield Strength | Standard Commercial Spec |
| Hardness | Varies by specific batch |
| 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 |
|---|---|
| Over-tightening the polycarbonate screw, which can lead to cracking or stripping of the threads. | Use a calibrated torque wrench and adhere to recommended torque specifications for polycarbonate fasteners. |
| Using the wrong tool for tightening, potentially damaging the hex head or the screw material. | Utilize a hex socket or wrench of the correct size that precisely fits the 34mm head width. |
A: This Hex Head Cap Screw, Polycarbonate is manufactured from Polycarbonate.
A: Electrical enclosure assembly, Chemical processing equipment, Corrosion-resistant machinery components.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||