This M21x38mm hex head cap screw is precision molded from high-strength polycarbonate. Offering excellent chemical resistance and non-conductive properties, it's an ideal choice for demanding environments.
| Standard | DIN 933 |
| Material | Polycarbonate |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M21 |
| Length | 38mm |
| Head Width | 17mm |
Engineered for reliability and performance, this M21x38mm hex head cap screw boasts a nominal diameter of M21 and a length of 38mm, with a precise 17mm head width for optimal tool engagement. Manufactured from advanced polycarbonate resin, it exhibits superior impact strength, excellent dielectric properties, and remarkable resistance to a wide range of chemicals and UV radiation. This makes it a preferred fastening solution for applications requiring non-metallic, lightweight, and corrosion-proof components, particularly in electrical, medical, and food processing industries.
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 from debris. 2. Insert the cap screw into the designated hole. 3. Tighten the cap screw using an appropriate wrench, applying gradual and even torque to the specified limit to avoid over-stressing the polycarbonate material.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | DIN 933 |
| 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, leading to material deformation or fracture. | Adhere to recommended torque specifications for polycarbonate fasteners, utilizing a torque wrench if necessary. |
| Using incompatible tools that could damage the hex head profile. | Employ the correct size and type of wrench designed for hex head fasteners to ensure proper engagement and prevent stripping. |
A: This Hex Head Cap Screw, Polycarbonate is manufactured from Polycarbonate.
A: Electrical enclosures and switchgear assembly, Medical device manufacturing, Corrosion-sensitive chemical processing equipment, Food and beverage processing machinery, Lightweight structural 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. | ||||