This M18 x 138mm Hex Head Cap Screw is precision-manufactured from premium 304 stainless steel. Offering superior corrosion resistance and mechanical strength, it's ideal for critical fastening applications.
| Standard | ISO 9001 |
| Material | 304 Stainless Steel |
| Finish | Passivated |
| Grade | N/A |
| Size | M18 |
| Length | 138mm |
| Head Width | 28mm |
Engineered for reliability and performance, this M18 Hex Head Cap Screw features a nominal diameter of 18mm and a substantial length of 138mm, ensuring deep thread engagement. The robust 28mm hexagonal head provides ample surface area for torque application, facilitating secure fastening. Constructed from 304 stainless steel, it exhibits excellent resistance to oxidation and corrosion, making it suitable for marine, chemical processing, and outdoor environments where exposure to moisture and aggressive substances is a concern. Its high tensile strength ensures dependable load-bearing capacity in demanding structural and mechanical assemblies.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Clean mating surfaces and threads of both the screw and the receiving hole. 2. Apply a suitable lubricant or anti-seize compound if recommended for the application, avoiding over-application. 3. Thread the cap screw into the receiving component by hand to ensure proper alignment and prevent cross-threading. 4. Tighten the cap screw to the specified torque using an appropriate wrench or socket on the hex head, employing a calibrated torque wrench for critical applications.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | ISO 9001 |
| 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) |
|---|---|---|
| M18 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M18 | Varies by dimension | Contact Sales |
| Environment | Rating |
|---|---|
| Indoor / Dry | Excellent |
| Outdoor / Exposed | Excellent |
| Marine / Saltwater | Good |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Cross-threading due to improper alignment during initial insertion. | Always start threading the screw by hand to confirm proper thread engagement before applying any torque. |
| Over-tightening, leading to thread stripping or material deformation. | Utilize a calibrated torque wrench and adhere to the manufacturer's specified torque values for the application. |
| Using the wrong tool size, which can strip the hex head or lead to improper torque application. | Ensure the correct size socket or wrench is used for the 28mm hex head to achieve secure fastening. |
A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.
A: Structural steel connections, Machinery and equipment assembly, Outdoor 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. | ||||