S-94128A159 10-32 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 load-bearing capacity with alloy steel construction and Rockwell C32 hardness for extended service life in demanding applications
- Precise component alignment ensured by the exact 1/4" shoulder diameter and minimal tolerance for reduced assembly vibration
- Reliable fine-thread engagement with 10-32 UNF threading and Class 3A fit, minimizing the risk of stripping in high-vibration environments
- Space-saving headless design with slotted drive for installations where clearance is limited and tooling is standard
- Consistent dimensional stability due to tight shoulder length tolerance (0" to 0.005") for repeatable positioning in automated assemblies
- Enhanced corrosion resistance and environmental compliance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 10-32 UNF fine thread with Class 3A fit provides secure fastening in applications susceptible to vibration loosening, such as rotating assemblies and motion control systems. The headless, slotted drive design allows for flush mounting in confined spaces, while the precisely machined shoulder acts as a pivot or axle, maintaining concentricity in gears, pulleys, and linkages. With Rockwell C32 hardness, it resists wear in high-cycle operations, making it ideal for automotive jigs, packaging equipment, and electronic manufacturing fixtures where precision shoulder fit and material strength are paramount for operational reliability.
Specification Summary & Compliance
This shoulder screw adheres to UNF thread standards with a Class 3A thread fit for high precision. The shoulder diameter is 1/4" with a tolerance of -0.001" to 0", and shoulder length is 3/4" with a tolerance of 0" to 0.005" for precise fit. It is manufactured from alloy steel with a hardness of Rockwell C32 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
