S-91273A935 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high stress
• Precise alignment and smooth rotation ensured by the 2-1/4" shoulder with tight diameter and length tolerances
• Easy installation and removal with the knurled socket head and 1/8" hex drive, preventing tool slippage
• Wide compatibility with 1/4"-20 UNC coarse threads and Class 2A fit, suitable for standard industrial assemblies
• Enhanced durability from Rockwell B55 hardness, maintaining integrity through repeated use
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial applications. The 18-8 stainless steel material, combined with a black oxide finish, provides excellent resistance to corrosion and wear, extending service life in demanding conditions. The 2-1/4" shoulder length with precise tolerances ensures accurate component positioning, reducing misalignment and wear in machinery, while the coarse UNC threads and Class 2A fit facilitate quick assembly and disassembly. The knurled socket head with a hex drive allows for secure tool engagement, minimizing the risk of damage during maintenance. Ideal for use in pivots, guides, and rotating assemblies, this shoulder screw delivers reliable performance and reduces downtime in engineering systems.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. Dimensions include a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring high precision. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial and commercial use without hazardous substances.