This M20 x 40mm hex head cap screw, crafted from premium 304 stainless steel, offers exceptional corrosion resistance and superior tensile strength for demanding fastening applications.
| Standard | DIN 933 |
| Material | 304 Stainless Steel |
| Finish | Galvanized |
| Grade | N/A |
| Size | M20 |
| Length | 40mm |
| Head Width | 17mm |
Engineered for reliability and performance, this M20 x 40mm hex head cap screw is manufactured from high-grade 304 stainless steel, renowned for its excellent resistance to corrosion and oxidation. The metric thread size ensures compatibility with metric tapped holes and nuts. Featuring a nominal diameter of M20 and a length of 40mm, the screw boasts a precisely machined head with a nominal width of 17mm, designed for optimal torque transfer with standard hex wrenches or sockets. Its robust construction makes it ideal for structural assemblies, machinery, marine environments, and food processing equipment where hygiene and durability are paramount.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select the appropriate size and type of wrench or socket that matches the hex head dimensions. 2. Ensure the mating thread (in a tapped hole or nut) is clean and free of debris. 3. Engage the screw fully into the mating thread and tighten to the required torque specification, ensuring even pressure distribution.
| 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) |
|---|---|---|
| M20 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M20 | 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 correctly fits the 17mm hex head to prevent damage and ensure proper torque application. |
| Overtightening, causing thread damage or material fatigue. | Adhere to the recommended torque specifications for the M20 thread size and the specific application to avoid overstressing the fastener and mating components. |
A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.
A: Structural assembly in corrosive environments, Machinery and equipment manufacturing, Marine and offshore applications.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||