S-94328A980 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability with 140,000 psi tensile strength and Rockwell C30 hardness for reliable performance in demanding applications
• Precision thread engagement with Class 3A fit ensures secure fastening and vibration resistance in critical assemblies
• Enhanced corrosion protection through black oxide finish extends service life in challenging industrial environments
• Secure installation and removal with knurled low-profile socket head design providing superior grip and torque transmission
• Accurate component alignment through precisely machined 3/8" shoulder diameter with tight tolerance control
• Optimized for high-volume applications with UNC coarse threads enabling quick assembly and disassembly
• Compliance assurance with RoHS 3 and REACH regulations for global market acceptance and environmental responsibility

Professional Applications & Engineering Value

This alloy steel shoulder screw delivers critical engineering solutions where precision alignment and high-strength fastening are paramount. The 5/16"-18 UNC coarse thread configuration with Class 3A thread fit ensures reliable engagement in high-vibration environments common in industrial machinery, automation systems, and precision equipment. The black oxide finish provides essential corrosion resistance while maintaining dimensional stability, making it ideal for applications requiring repeated assembly cycles. The knurled socket head with low-profile design enables secure tool engagement in confined spaces, while the precisely controlled shoulder diameter and length facilitate accurate component positioning in rotating assemblies, pivoting mechanisms, and bearing mounts where concentricity is critical.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC thread specifications. The shoulder features tight dimensional control with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Mechanical properties include 140,000 psi tensile strength and Rockwell C30 hardness for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial applications.