S-94361A327 1/4"-28 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 tensile strength of 140,000 psi ensures reliable performance in high-stress industrial applications
- Superior corrosion resistance through black oxide finish extends service life in demanding environments
- Precision Class 3A thread fit guarantees secure fastening with minimal backlash in critical assemblies
- Rockwell C32 hardness provides excellent wear resistance and durability under repeated use
- Knurled socket head design offers improved grip and easier installation with standard hex tools
- Fine UNF threading delivers enhanced vibration resistance and superior clamping force
- Regulatory compliance with RoHS 3 and REACH ensures environmental responsibility and global market acceptance
Professional Applications & Engineering Value
This alloy steel shoulder screw with black oxide finish addresses critical engineering challenges in precision machinery and industrial equipment. The Class 3A thread fit and UNF fine threading provide exceptional vibration resistance, making it ideal for rotating assemblies, pivoting mechanisms, and precision alignment applications where minimal play is essential. The knurled socket head design ensures secure tool engagement during installation, reducing the risk of stripping in high-torque scenarios. With its 140,000 psi tensile strength and Rockwell C32 hardness, this shoulder screw maintains dimensional stability under heavy loads, serving as a reliable locating pin or shaft in automation systems, manufacturing jigs, and precision instruments where repeated cycling demands exceptional durability.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and standard shoulder fit tolerances. Thread specifications include 1/4"-28 UNF fine thread with right-hand orientation. The shoulder diameter maintains tight tolerance of -0.004" to -0.002" for precise locating applications. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance for industrial applications.
