S-91054A467 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
- Enhanced Wear Resistance: TiCN coating provides superior surface hardness, extending service life in high-friction applications.
- High Tensile Strength: 70,000 psi tensile strength ensures reliable performance under heavy loads and stress.
- Precise Shoulder Fit: 1/8" shoulder diameter with tight tolerance (-0.002" to 0") enables accurate alignment and reduced vibration.
- Corrosion Resistance: 18-8 stainless steel construction offers excellent durability in harsh environments.
- Consistent Thread Engagement: Class 2A UNC coarse threads ensure easy assembly and secure fastening.
- Easy Installation: Hex socket drive (5/64") allows for efficient torque application in confined spaces.
- Regulatory Compliance: Meets RoHS 3 and REACH standards for safe use in regulated industries.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 1" shoulder length with a minimal tolerance (0" to 0.003") provides a stable bearing surface, minimizing component misalignment and wear in rotating machinery, pivoting mechanisms, and electronic enclosures. Made from 18-8 stainless steel and enhanced with a TiCN coating, it resists corrosion and abrasion, making it ideal for automotive, aerospace, and industrial equipment where high tensile strength and long-term reliability are paramount. The socket head design with a hex drive facilitates quick maintenance and secure fastening in tight spaces, reducing downtime and improving operational efficiency.
Specification Summary & Compliance
This shoulder screw features a Class 2A thread fit with UNC coarse threads for consistent engagement. The shoulder diameter is precision-machined to 1/8" with a tolerance of -0.002" to 0", and the shoulder length is 1" with a tolerance of 0" to 0.003" for exact fitment. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial applications.
