This M21x146mm Hex Head Cap Screw is precision-engineered from high-performance polycarbonate. Offering exceptional strength and electrical insulation, it is the superior choice for applications requiring corrosion resistance and a non-metallic fastening solution.
| Standard | ISO 9001 |
| Material | Polycarbonate |
| Finish | Passivated |
| Grade | N/A |
| Size | M21 |
| Length | 146mm |
| Head Width | 16mm |
Manufactured under strict quality controls, this M21x146mm Hex Head Cap Screw features a nominal diameter of M21 and a length of 146mm, with a head width of 16mm. Constructed from premium polycarbonate, it exhibits excellent impact resistance, a high tensile strength-to-weight ratio, and superior dielectric properties. Its inherent corrosion immunity makes it ideal for use in chemically aggressive environments and where electrical conductivity must be avoided. Designed for reliable performance in demanding industrial settings.
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 from debris. 2. Engage the M21 polycarbonate hex head cap screw by hand to prevent cross-threading. 3. Tighten using an appropriate socket wrench, applying consistent torque without over-stressing the polycarbonate material.
| 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 |
| 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 which can lead to thread stripping or material cracking. | Use a torque wrench set to the manufacturer's recommended torque value for polycarbonate fasteners and apply gradual, steady pressure. |
| Using metal tools that can damage the polycarbonate head. | Utilize sockets made from materials that are less likely to mar or gouge polycarbonate, or use protective sleeves on metal tools. |
A: This Hex Head Cap Screw, Polycarbonate is manufactured from Polycarbonate.
A: Electrical enclosures and equipment mounting, Corrosion-prone chemical processing equipment, Lightweight structural assemblies in sensitive environments.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||