S-98256A101 4-40 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional strength-to-weight ratio with Grade 2 Titanium construction, offering high tensile strength of 40,000 psi for demanding applications.
- Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies.
- Hex socket drive with 5/64" size provides secure tool engagement and reduces stripping risk during installation.
- Knurled head texture enhances grip for manual adjustments and prevents slippage in high-vibration environments.
- Coarse UNC threads enable faster installation and better performance in materials prone to galling.
- RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global industrial use.
- Rockwell B80 hardness maintains thread integrity and wear resistance under repeated use.
Professional Applications & Engineering Value
This Grade 2 Titanium shoulder screw is engineered to address common challenges in precision machinery, aerospace, and medical devices where corrosion resistance and high strength are critical. The 4-40 UNC coarse thread with Class 3A fit minimizes cross-threading and ensures consistent clamping force in assemblies subject to thermal cycling. The 1/8" shoulder diameter provides accurate alignment for rotating components, while the hex drive socket head allows for high-torque installation without compromising the knurled texture’s anti-slip benefits. Ideal for industrial shoulder screw applications requiring lightweight durability and compliance with stringent RoHS and REACH standards.
Specification Summary & Compliance
This shoulder screw features a 4-40 UNC thread with Class 3A precision fit, ensuring tight tolerances for thread diameter and spacing. The shoulder diameter is maintained at 1/8" with a tolerance of -0.004" to -0.002", and shoulder length at 1/8" with -0.005" to 0.005" tolerance. Manufactured to Rockwell B80 hardness and 40,000 psi tensile strength, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting use in regulated industries.
