S-97381A103 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
- High-strength aluminum construction provides excellent corrosion resistance and lightweight durability for demanding industrial environments.
- Precise Class 3A thread fit ensures reliable, secure fastening with minimal risk of cross-threading in assembly operations.
- Knurled hex socket head offers superior grip and torque transmission, reducing tool slippage during installation.
- Integrated shoulder design acts as a precise pivot or spacer, maintaining accurate component alignment.
- Robust mechanical properties with 40,000 psi tensile and 20,000 psi shear strength support high-stress applications.
- Coarse UNC threading enables quick assembly and disassembly, improving maintenance efficiency.
- Full regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global market acceptance.
Professional Applications & Engineering Value
This 6061 aluminum shoulder screw delivers critical engineering solutions where precision alignment and weight reduction are paramount. The 4-40 UNC coarse thread combined with Class 3A fit provides exceptional engagement in thin materials and plastic components, preventing stripping while the 1/4" shoulder length serves as an accurate bearing surface or pivot point in machinery, automation equipment, and electronic assemblies. The hex drive design with knurled texture ensures maximum torque transfer, reducing installation time and tool wear. Ideal for precision instruments, robotic linkages, and optical mounting systems, these screws maintain dimensional stability under operational stresses while the aluminum construction prevents galvanic corrosion in mixed-material assemblies.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit for superior engagement, UNC coarse thread profile, and precise shoulder dimensions (1/8" diameter with -0.004" to -0.002" tolerance, 1/4" length with ±0.005" tolerance). Compliant with RoHS 3 (2015/863/EU) under exemption 6(b)-II and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance for industrial applications.
