S-94496A670 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 load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating, extending service life in industrial environments
- Precision thread engagement with Class 2A UNC coarse threads ensuring consistent, vibration-resistant fastening
- Optimized shoulder design featuring 3/8" diameter and 2 1/4" length for accurate component alignment and spacing
- Easy installation and removal with external hex drive and 5/8" head width for standard tool compatibility
- Enhanced durability from Rockwell B80 hardness steel construction resisting wear and deformation
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global market acceptance
Professional Applications & Engineering Value
This steel shoulder screw with 1/4"-20 UNC thread and zinc plated finish delivers critical engineering solutions for precision assembly applications. The 3/4" thread length and 2 1/4" shoulder length provide exact component positioning in machinery, automation systems, and rotating assemblies where precise alignment is paramount. The external hex drive design enables quick installation and maintenance access in confined spaces, while the coarse UNC thread ensures rapid assembly without cross-threading risks. Ideal for pivot points, bearing mounts, and linkage systems, this shoulder screw eliminates the need for additional spacers or bushings, reducing assembly time and component count while maintaining high tensile strength under dynamic loads.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance and shoulder diameter tolerance of -0.004" to 0". Features right-hand UNC thread with coarse spacing for optimal engagement. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) standards as of January 17, 2023. The zinc plated finish on steel material provides consistent corrosion protection while maintaining the Rockwell B80 hardness specification for long-term reliability.
