Engineered for robust fastening, this M21x119mm hex head cap screw is crafted from high-grade 304 stainless steel. Its superior corrosion resistance and tensile strength ensure reliable performance in challenging environments.
| Standard | ASTM A106 |
| Material | 304 Stainless Steel |
| Finish | Zinc Plated |
| Grade | N/A |
| Size | M21 |
| Length | 119mm |
| Head Width | 28mm |
Precision-manufactured to tight tolerances, this M21x119mm hex head cap screw offers exceptional dimensional accuracy for secure and repeatable assembly. Constructed from premium 304 stainless steel, it exhibits excellent resistance to corrosion and oxidation, making it suitable for outdoor, marine, and chemical processing applications. The hex head design facilitates high torque application with standard tools, while the M21 thread pitch and 119mm length provide substantial clamping force and reach. The 28mm head width ensures proper tool engagement and load distribution.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select the appropriate wrench or socket size (28mm for this M21 screw). 2. Ensure threads on both the screw and the mating component are clean and free from debris. 3. Hand-thread the screw to start, then tighten with the wrench to the specified torque, avoiding over-tightening. 4. Verify secure engagement and proper alignment of the fastened components.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ASTM A106 |
| 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 |
|---|---|
| Using the wrong size wrench, leading to stripped head or improper torque. | Always use a wrench or socket that precisely fits the 28mm hex head for optimal engagement and torque application. |
| Cross-threading during installation, damaging both the screw and the receiving threads. | Start threading by hand to ensure proper alignment before applying any tool torque. |
| Over-tightening, which can lead to thread stripping, fastener fatigue, or component damage. | Adhere to recommended torque specifications for the application. If unsure, consult engineering documentation or a torque chart. |
A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.
A: Structural assembly in corrosive environments, Marine and offshore equipment, Chemical processing plants, Food and beverage industry machinery, General industrial machinery and equipment.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||