This M21x75mm Hex Head Cap Screw, constructed from high-performance polycarbonate, offers exceptional strength, chemical resistance, and electrical insulation for demanding industrial applications. Its robust design ensures reliable fastening in corrosive environments.
| Standard | ASTM A106 |
| Material | Polycarbonate |
| Finish | Galvanized |
| Grade | N/A |
| Size | M21 |
| Length | 75mm |
| Head Width | 28mm |
Engineered for reliability and performance, this M21x75mm Hex Head Cap Screw features a robust polycarbonate construction, providing superior resistance to a wide range of chemicals and solvents, making it ideal for corrosive environments. With a head width of 28mm, it offers ample surface area for torque application while maintaining a lightweight profile. The material's inherent electrical insulation properties make it suitable for applications where conductivity is a concern. This fastener is designed to withstand moderate loads and temperature variations within its operational parameters, ensuring long-term structural integrity and performance.
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 compatible threaded hole or nut. 2. Manually insert the M21x75mm polycarbonate hex head cap screw, ensuring smooth thread engagement to avoid cross-threading. 3. Using a calibrated torque wrench, tighten the screw to the recommended torque value, avoiding overtightening to prevent material deformation or stripping.
| 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 |
| 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 |
|---|---|
| Overtightening the polycarbonate screw, leading to thread stripping or head deformation. | Always use a calibrated torque wrench and adhere to the manufacturer's recommended torque specifications for polycarbonate fasteners. |
| Using the screw in applications exceeding its chemical resistance or temperature limits. | Verify the chemical compatibility and operational temperature range of polycarbonate before deployment in specific environments. |
A: This Hex Head Cap Screw, Polycarbonate is manufactured from Polycarbonate.
A: Chemical processing equipment assembly, Electrical enclosures and control panels, Medical device manufacturing, Food and beverage processing 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. | ||||