S-91273A651 3/8"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced durability and wear resistance from the black oxide finish, extending service life
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and reduced wear ensured by the Class 2A thread fit and standard shoulder fit
• Secure, non-slip installation facilitated by the knurled socket head and hex drive design
• Reliable fine thread engagement with 3/8"-24 UNF right-hand threads for vibration resistance
• Consistent dimensional accuracy with controlled shoulder diameter and length tolerances for easy assembly

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The black oxide finish not only provides an additional layer of corrosion protection but also reduces galling during installation, a common issue in high-torque applications. With a Rockwell B55 hardness and 70,000 psi tensile strength, it withstands repetitive loads and shocks in linkages, pivots, and rotating assemblies. The 3/8" shoulder diameter and 3/4" shoulder length offer a stable bearing surface, minimizing misalignment and bushings wear. Its UNF fine threads ensure secure fastening in vibrating environments, making it a reliable choice for OEMs and MRO professionals seeking longevity and performance in industrial fasteners.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit for consistent assembly and features a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. Manufactured to precise inch system standards, it guarantees reliable performance in regulated industrial settings.