Engineered from high-strength polycarbonate, this M18 x 20mm hex head cap screw offers exceptional resistance to chemicals and corrosion. Its lightweight design and superior impact strength make it ideal for critical fastening applications where traditional metals are unsuitable.
| Standard | ASTM A106 |
| Material | Polycarbonate |
| Finish | Anodized |
| Grade | N/A |
| Size | M18 |
| Length | 20mm |
| Head Width | 30mm |
Specified by design engineers worldwide, this M18 x 20mm polycarbonate hex head cap screw features a precisely manufactured M18 thread and a 20mm nominal length. The head boasts a 30mm width for effective torque application. Polycarbonate's inherent dielectric properties, UV resistance, and operating temperature range of -40°C to +120°C make it a superior choice for environments with electrical concerns or exposure to harsh elements. Its excellent impact strength ensures reliability in vibration-prone or high-stress situations, surpassing many metal alternatives.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Ensure the mating threads are clean and free of debris. 2. Hand-thread the cap screw into the receiving hole to confirm alignment and prevent cross-threading. 3. Using an appropriate wrench or socket (sized for the 30mm head width), tighten the screw to the required torque specification, avoiding over-tightening to maintain material integrity.
| 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) |
|---|---|---|
| M18 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M18 | 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, leading to thread stripping or head cracking. | Adhere to the manufacturer's recommended torque values for polycarbonate fasteners, utilizing a torque wrench for precision. |
| Using excessive force during initial engagement, potentially damaging the threads. | Always hand-thread the fastener first to ensure proper engagement and alignment before applying torque. |
A: This Hex Head Cap Screw, Polycarbonate is manufactured from Polycarbonate.
A: Chemical processing equipment, Marine and offshore installations, Electrical enclosures and 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. | ||||