S-97345A104 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 corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life.
- Superior load-bearing capacity with a tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable performance under stress.
- Precise alignment and secure fit due to the Class 3A thread fit and standard shoulder, minimizing assembly play and vibration.
- Enhanced durability and wear resistance from Rockwell B79 hardness, ensuring the screw maintains integrity in demanding applications.
- Easy installation and removal with a 5/64" hex socket drive and knurled head for improved grip and torque application.
- Broad industrial compatibility with 4-40 UNC coarse threads, facilitating quick assembly and disassembly in various machinery.
- Compliance with environmental regulations, being RoHS 3 and REACH compliant for safe use in global markets.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. Its Class 3A thread fit and standard shoulder ensure precise component positioning in assemblies like rotating shafts, pivots, and spacers, reducing wear and maintenance costs. The coarse UNC thread allows for rapid installation in materials where fine threads might strip, while the high tensile and shear strength provides reliable fastening in high-stress environments, from automotive to electronics. The knurled head and hex socket drive enhance handling efficiency, making it a top choice for applications demanding both durability and ease of use.
Specification Summary & Compliance
The screw features a 4-40 UNC thread with Class 3A precision fit for tight tolerances, alongside a shoulder diameter of 1/8" and length of 5/8" with minimal tolerances (e.g., shoulder diameter: -0.004" to -0.002"). It adheres to industry standards for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets regulatory requirements for hazardous substances in industrial fastening solutions.
