S-91273A621 5/16"-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 and black oxide finish, ideal for harsh industrial environments.
- Precise alignment and smooth rotation thanks to the 1-1/2" shoulder with tight diameter and length tolerances.
- High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications.
- Secure, non-slip fastening enabled by the knurled socket head and 5/32" hex drive for reliable torque transmission.
- Fine-thread accuracy with 5/16"-24 UNF Class 2A threads ensuring vibration resistance and a secure fit.
- Enhanced durability with a Rockwell B55 hardness, providing excellent wear resistance over time.
- Global compliance assurance meeting RoHS 3 and REACH standards for safe, sustainable use in regulated industries.
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and wear challenges in precision machinery. The 18-8 stainless steel material, combined with a black oxide finish, offers exceptional corrosion resistance, reducing maintenance in humid or chemically exposed settings. The 1-1/2" shoulder length with minimal tolerances ensures exact component positioning, minimizing play in assemblies like pivots, gears, and linkages. The 5/16"-24 UNF fine thread and Class 2A fit provide reliable, vibration-resistant fastening, while the knurled socket head allows for easy installation in tight spaces. Ideal for robotics, automotive, and industrial equipment, this screw enhances operational reliability and longevity.
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 5/16" (tolerance: -0.004" to -0.002") and length of 1-1/2" (tolerance: -0.005" to 0.005"), ensuring consistent performance. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally responsible industrial applications.
