This M21x94mm Hex Head Cap Screw, forged from premium 316 stainless steel, offers superior corrosion resistance and exceptional tensile strength. Engineered for critical applications requiring robust and reliable fastening.
| Standard | ASTM A106 |
| Material | 316 Stainless Steel |
| Finish | Zinc Plated |
| Grade | N/A |
| Size | M21 |
| Length | 94mm |
| Head Width | 22mm |
Specified by design engineers worldwide, this M21x94mm hex head cap screw is manufactured from high-grade 316 stainless steel, renowned for its excellent resistance to pitting, crevice corrosion, and chloride attack. With a nominal diameter of M21, a length of 94mm, and a head width of 22mm, it conforms to stringent international standards. This material composition makes it ideal for marine, chemical processing, and food-grade environments where elevated performance and longevity are paramount. The hex head design facilitates high torque application with standard tooling.
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. Apply a suitable thread lubricant if recommended for the application. 3. Tighten the cap screw using an appropriately sized wrench to the specified torque value.
| 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) | 16.0 - 18.0% |
| Nickel (Ni) | 10.0 - 14.0% |
| Molybdenum (Mo) | 2.0 - 3.0% |
| 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 | Excellent |
| Chemical / Acidic | Good |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Using insufficient torque, leading to a loose connection. | Always adhere to the manufacturer's recommended torque specifications for the fastener size and application. |
| Cross-threading the fastener, damaging both the screw and the mating component. | Carefully align the screw with the threads and initiate tightening by hand for at least two full turns before using a tool. |
A: This Hex Head Cap Screw, 316 Stainless Steel is manufactured from 316 Stainless Steel.
A: Marine hardware and shipbuilding, Chemical and petrochemical processing equipment, Food and beverage processing machinery, Offshore oil and gas platforms, Wastewater treatment facilities.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||