S-91054A498 1/4"-20 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 18-8 stainless steel construction, ideal for harsh industrial environments.
- Enhanced durability and wear resistance from TiCN coating, extending service life in high-friction applications.
- Precise alignment and smooth rotation due to the 2" shoulder with tight tolerances, reducing component wear.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
- Easy installation and removal with 5/32" hex drive, allowing for secure torque application in confined spaces.
- Accurate thread engagement with Class 2A fit and 1/4"-20 UNC coarse threads, preventing cross-threading.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This precision shoulder screw is engineered to address common challenges in machinery assembly, such as misalignment and component wear. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, while the TiCN coating provides a hard, low-friction surface that withstands repetitive motion and abrasive conditions. The 2" shoulder with precise diameter and length tolerances ensures accurate positioning of parts like gears, pulleys, and linkages, minimizing play and vibration. With a 1/4"-20 UNC coarse thread and Class 2A fit, it delivers secure fastening in industrial applications including automotive, aerospace, and heavy equipment, where reliability and longevity are critical.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit and UNC standards for consistent performance. Key dimensions include a thread size of 1/4"-20, thread length of 3/8", shoulder diameter of 5/16" with tolerance from -0.002" to 0", and shoulder length of 2" with tolerance from 0" to 0.003". It is manufactured from 18-8 stainless steel with a hardness of Rockwell B55 and tensile strength of 70,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.
