Engineered for superior performance, this M21 x 11mm Hex Head Cap Screw is crafted from robust 304 stainless steel. Its precise dimensions and corrosion resistance make it a dependable choice for critical fastening applications.
| Standard | DIN 933 |
| Material | 304 Stainless Steel |
| Finish | Plain |
| Grade | N/A |
| Size | M21 |
| Length | 11mm |
| Head Width | 30mm |
Built to exacting engineering tolerances, this M21 Hex Head Cap Screw boasts a nominal diameter of M21 and a compact length of 11mm, with a substantial 30mm head width for secure torque application. Constructed from premium 304 stainless steel, it offers excellent corrosion resistance, crucial for environments exposed to moisture or chemicals, and provides reliable tensile strength. The hex drive ensures efficient and secure tightening with standard tools, making it suitable for applications requiring a low-profile, high-strength fastening solution.
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 to the manufacturer's recommended torque specification using an appropriate wrench.
| 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) |
|---|---|---|
| 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 | Excellent |
| Marine / Saltwater | Good |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Over-tightening leading to stripped threads or fastener fracture. | Always use a calibrated torque wrench and adhere to recommended torque values for the specific application and mating materials. |
| Using the wrong tool size for the hex head, resulting in cam-out and fastener damage. | Utilize a properly sized hex bit or wrench that fits snugly into the head recess to ensure maximum engagement and prevent slippage. |
A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.
A: Machinery and equipment assembly, Structural components in corrosive environments, Automotive and marine 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. | ||||