S-91273A934 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
- Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced durability and wear resistance from the black oxide finish, reducing maintenance needs
- Superior torque transmission and grip thanks to the knurled socket head and hex drive design
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for demanding applications
- Precise alignment and reduced wear due to the Class 2A thread fit and standard shoulder fit
- Reliable performance in regulated industries with full RoHS 3 and REACH compliance
- Easy installation and removal with the 1/8" hex drive and right-hand UNC coarse threads
Professional Applications & Engineering Value
This 1/4"-20 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for automotive, aerospace, and machinery applications where environmental factors are a concern. The black oxide finish not only enhances aesthetics but also adds a protective layer against abrasion. With a 1-3/4" shoulder length and precise Class 2A thread fit, it ensures accurate component positioning, reducing vibration and wear in rotating parts like bearings, pulleys, and gears. The knurled socket head offers superior grip for secure fastening, even in high-torque scenarios, while the UNC coarse threads facilitate quick assembly and disassembly, boosting productivity in industrial settings.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 1-3/4" with a tolerance of -0.005" to 0.005", ensuring reliable performance in precision applications. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally conscious and safe industrial use.
