This M21x128mm Hex Head Cap Screw, crafted from high-performance Titanium Grade 5, offers exceptional strength-to-weight ratio and superior corrosion resistance for critical applications.
| Standard | ASTM A106 |
| Material | Titanium Grade 5 |
| Finish | Black Oxide |
| Grade | N/A |
| Size | M21 |
| Length | 128mm |
| Head Width | 13mm |
Built to exacting engineering tolerances, this M21x128mm Hex Head Cap Screw is manufactured from Titanium Grade 5 (Ti-6Al-4V), a dual-phase alloy renowned for its excellent mechanical properties including high tensile strength (up to 950 MPa) and fatigue resistance. The material's inherent biocompatibility and non-magnetic nature make it suitable for specialized uses. The 13mm hex head ensures secure torque application with standard tooling, while the 128mm length provides ample grip for robust connections in aerospace, marine, and medical device assemblies.
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 from debris. 2. Apply appropriate lubricant or anti-seize compound if specified for the application. 3. Engage the screw by hand to prevent cross-threading, then tighten using a calibrated torque wrench to the manufacturer's recommended torque value.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ASTM A106 |
| Tensile Strength | Standard Commercial Spec |
| Yield Strength | Standard Commercial Spec |
| Hardness | Varies by specific batch |
| 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 | Moderate |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Over-tightening the screw, leading to thread stripping or material fatigue. | Always use a calibrated torque wrench and adhere to recommended torque specifications for Titanium Grade 5 fasteners. |
| Using incompatible lubricants or anti-seize compounds that can cause hydrogen embrittlement or galvanic corrosion. | Consult material compatibility charts or the fastener manufacturer for recommended lubrication and anti-seize solutions for Titanium Grade 5. |
A: This Hex Head Cap Screw, Titanium Grade 5 is manufactured from Titanium Grade 5.
A: Aerospace structural components, Marine hardware and subsea equipment, High-performance automotive and motorsport, Medical implants and surgical instruments, Chemical processing 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. | ||||