Engineered for superior performance, this M8 x 139mm hex cap screw is crafted from premium 304 stainless steel. It offers exceptional corrosion resistance and strength for critical fastening applications.
| Standard | DIN 933 |
| Material | 304 Stainless Steel |
| Finish | Anodized |
| Grade | N/A |
| Size | M8 |
| Length | 139mm |
| Head Width | 8mm |
Built to exacting engineering tolerances, this M8 x 139mm hex head cap screw features a nominal diameter of 8mm and a length of 139mm. The robust 304 stainless steel composition provides excellent tensile strength and resistance to a wide range of corrosive environments, including saltwater and many chemicals, making it suitable for marine, food processing, and chemical plant applications. The hex head design ensures a secure grip for high-torque applications when used with appropriate tooling. This fastener meets stringent industrial standards for reliability and durability.
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 of debris. 2. Apply appropriate lubricant if high torque is required or galling is a concern. 3. Securely tighten the hex head cap screw using a calibrated torque wrench to the manufacturer's recommended specification.
| 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 incorrect thread pitch for the application. | Verify the thread pitch of the cap screw matches the tapped hole or nut precisely to prevent cross-threading and ensure secure engagement. |
| Over-tightening the fastener, leading to thread stripping or material fatigue. | Utilize a torque wrench set to the specified torque value for the fastener size and material to avoid over-stressing the threads and components. |
A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.
A: Marine and offshore equipment assembly, Food processing machinery, Chemical plant infrastructure, Outdoor 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. | ||||