S-91273A227 3/8"-24 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 for long-lasting performance in harsh industrial environments.
- Precise component alignment ensured by the 1-3/4" shoulder with tight diameter and length tolerances for stable assemblies.
- High-strength fastening with 70,000 psi tensile and 35,000 psi shear strength to withstand significant operational loads.
- Secure, slip-resistant installation via the knurled head and 3/16" hex drive, allowing for high-torque application.
- Reliable thread engagement with Class 2A fit and 3/8"-24 UNF fine thread for vibration resistance and precise adjustments.
- Consistent hardness and durability from Rockwell B55 rating, maintaining structural integrity under repeated use.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. Its 3/8"-24 UNF fine thread and Class 2A thread fit provide excellent vibration resistance, making it ideal for machinery, automation systems, and rotating equipment where loosening can cause failures. The 1-3/4" shoulder length with minimal tolerances ensures components like gears, pulleys, and bearings remain perfectly positioned, reducing wear and maintenance. Combined with a knurled head and hex drive, it offers secure, high-torque installation in confined spaces, enhancing assembly reliability and efficiency in industrial applications.
Specification Summary & Compliance
This shoulder screw adheres to UNF thread standards with a Class 2A thread fit for precise engagement. Shoulder dimensions include a diameter of 3/8" (-0.004" to -0.002" tolerance) and length of 1-3/4" (-0.005" to 0.005" tolerance) to ensure consistent performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally responsible manufacturing and use.
