S-97345A297 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
- Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh environments
- High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Precise Class 3A thread fit ensuring secure, vibration-resistant fastening in critical assemblies
- Enhanced grip and handling from the knurled socket head design for easy installation and removal
- Accurate component alignment with the 2-1/4" shoulder length providing stable bearing surfaces
- Reliable drive engagement using standard 5/64" hex drive for consistent torque application
- Environmental compliance meeting RoHS 3 and REACH standards for global manufacturing requirements
Professional Applications & Engineering Value
This 4-40 UNC Class 3A shoulder screw delivers exceptional engineering value in precision industrial applications where alignment accuracy and corrosion resistance are critical. The 316 stainless steel construction provides superior protection against chemical exposure and marine environments, while the Rockwell B79 hardness ensures dimensional stability under load. The knurled socket head design prevents tool slippage during installation in confined spaces, and the 2-1/4" shoulder length maintains precise component spacing in rotating assemblies, pivot mechanisms, and bearing mounts. Ideal for machinery, medical equipment, and aerospace applications requiring high-strength shoulder screws with reliable performance in demanding conditions.
Specification Summary & Compliance
This precision shoulder screw features 4-40 UNC coarse threads with Class 3A fit for superior thread engagement and vibration resistance. The shoulder diameter maintains tight tolerances of -0.004" to -0.002" with shoulder length controlled within -0.005" to 0.005". Manufactured to industry standards using 316 stainless steel with Rockwell B79 hardness, the screw delivers 70,000 psi tensile strength and 35,000 psi minimum shear strength. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for global manufacturing applications.
