S-91273A936 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Enhanced durability and wear resistance from the Black Oxide finish, providing long-lasting performance
- Precise alignment and secure fit due to Class 2A thread fit and UNF fine threading, reducing assembly errors
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing capacity
- Easy installation and removal with hex socket drive and knurled head, improving maintenance efficiency
- Consistent dimensional accuracy with tight shoulder tolerances, enabling repeatable precision in assemblies
- Compliance with environmental regulations including RoHS 3 and REACH, supporting sustainable manufacturing practices
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to address critical challenges in precision mechanical systems, such as misalignment and component wear. The UNF fine thread with Class 2A fit ensures secure fastening in high-vibration applications, while the Black Oxide finish enhances corrosion resistance in demanding environments like automotive, robotics, and industrial machinery. The knurled head and hex drive facilitate quick assembly and disassembly, reducing downtime. With a Rockwell B55 hardness and high tensile strength, it provides reliable performance in pivot points, bearing mounts, and linkage systems, ensuring long-term operational stability and reduced maintenance costs.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit and UNF fine thread standards, with precise shoulder diameter and length tolerances for consistent performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured to deliver 70,000 psi tensile strength and 35,000 psi shear strength, it is suitable for high-stress applications requiring reliable fastening solutions.
