Engineered for robust fastening, these M4 x 131mm hex head cap screws are crafted from premium 304 stainless steel for superior corrosion resistance and durability.
| Standard | ISO 9001 |
| Material | 304 Stainless Steel |
| Finish | Zinc Plated |
| Grade | N/A |
| Size | M4 |
| Length | 131mm |
| Head Width | 12mm |
Purpose-built for heavy-duty applications, these M4 x 131mm hex head cap screws offer exceptional tensile strength and fatigue resistance, owing to their precise manufacturing from 304 stainless steel. This alloy provides excellent protection against rust and corrosion, making them ideal for environments exposed to moisture, chemicals, or saltwater. The 12mm hex head ensures a secure grip for high-torque applications, facilitating reliable and long-lasting connections in structural assemblies, machinery, and outdoor equipment. Their consistent dimensions and material integrity meet stringent industrial standards for critical joining tasks.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select appropriate tooling (e.g., socket wrench, hex key) matching the 12mm head width. 2. Ensure the mating components are clean and free from debris. 3. Thread the screw into the receiving component until snug, then apply torque according to specified load requirements, avoiding over-tightening.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ISO 9001 |
| Tensile Strength | 75,000 psi (515 MPa) |
| Yield Strength | 30,000 psi (205 MPa) |
| Elongation in 2 in. | 40% min |
| Hardness | Rockwell B95 max |
| Carbon (C) | 0.08% max |
| Chromium (Cr) | 18.0 - 20.0% |
| Nickel (Ni) | 8.0 - 10.5% |
| Manganese (Mn) | 2.00% max |
| Bolt Size | Dry Torque (ft-lbs) | Lubricated Torque (ft-lbs) |
|---|---|---|
| M4 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M4 | Varies by dimension | Contact Sales |
| Environment | Rating |
|---|---|
| Indoor / Dry | Excellent |
| Outdoor / Exposed | Excellent |
| Marine / Saltwater | Good |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Using incorrect torque, leading to fastener failure or damage to mating components. | Always adhere to the recommended torque specifications for the specific application and materials being joined. Consult engineering drawings or torque charts. |
| Cross-threading the screw, causing damage to both the screw and the threaded hole. | Start threading the screw by hand to ensure it engages properly with the threads before applying any tool torque. If resistance is met, back out and realign. |
A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.
A: Structural steel connections, Marine hardware and rigging, Industrial machinery and equipment assemblies.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||