This M8x139mm hex head cap screw, crafted from premium 304 stainless steel, offers superior corrosion resistance and high tensile strength. Engineered for robust performance in challenging environments, it ensures reliable and long-lasting fastening solutions.
| Standard | DIN 933 |
| Material | 304 Stainless Steel |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M8 |
| Length | 139mm |
| Head Width | 15mm |
Purpose-built for heavy-duty applications, this M8x139mm hex head cap screw features a nominal diameter of M8, a total length of 139mm, and a head width of 15mm. Constructed from 304 stainless steel, it exhibits excellent resistance to corrosion, oxidation, and a wide range of chemicals, making it ideal for environments prone to moisture, salt, or acidic exposure. The material's inherent toughness and high tensile strength ensure it can withstand significant loads and vibrations without failure, suitable for demanding industrial machinery, structural assemblies, marine hardware, and outdoor construction projects.
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. Hand-thread the cap screw to engage the initial threads to prevent cross-threading. 3. Tighten using a properly sized wrench or socket, applying torque gradually according to application requirements and safety standards.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | DIN 933 |
| 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) |
|---|---|---|
| M8 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M8 | Varies by dimension | Contact Sales |
| Environment | Rating |
|---|---|
| Indoor / Dry | Excellent |
| Outdoor / Exposed | Excellent |
| Marine / Saltwater | Good |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Using the wrong size wrench, leading to head stripping. | Always use a wrench or socket that precisely matches the 15mm head width to ensure proper engagement and prevent damage. |
| Cross-threading due to improper initial engagement. | Start by hand-threading the screw to confirm it's engaging the mating threads correctly before applying any tools. |
A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.
A: Industrial Machinery Assembly, Marine Hardware and Structures, Outdoor Construction and Fabrication.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||