S-92183A381 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise alignment and secure positioning thanks to the 1/2" shoulder diameter with tight tolerance control
• High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Secure, non-slip installation enabled by the knurled socket head and 1/4" hex drive
• Reliable thread engagement with Class 3A UNC coarse threads ensuring consistent fastening
• Versatile shoulder length options from 2" to 3.99" to accommodate various assembly requirements
• Compliance with environmental regulations including RoHS 3 and REACH for global industrial use

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to solve critical alignment and durability challenges in precision machinery, automation systems, and rotating assemblies. The 5/16"-18 UNC Class 3A thread with coarse spacing provides excellent vibration resistance and quick assembly, while the precisely machined shoulder maintains accurate component positioning under load. The knurled socket head with 1/4" hex drive ensures tool engagement security during high-torque installation. With Rockwell B55 hardness and corrosion-resistant properties, this fastener delivers long-term reliability in manufacturing equipment, conveyor systems, and industrial robotics where misalignment and material degradation are common concerns.

Specification Summary & Compliance

This shoulder screw maintains Class 3A thread fit per UNC standards with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.002" to 0.002" for precision applications. Manufactured from 18-8 stainless steel with right-hand thread direction and standard socket head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety in industrial components.