S-91273A918 5/16"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction for long-lasting performance in harsh environments
• Superior load-bearing capability with 70,000 PSI tensile strength and 35,000 PSI shear strength for demanding applications
• Enhanced installation control through knurled head texture providing secure grip during assembly
• Precise thread engagement with Class 2A thread fit ensuring reliable fastening in critical assemblies
• Optimized torque transmission via hex socket drive design for efficient installation and removal
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements
• Consistent dimensional accuracy with fine UNF thread spacing and standardized shoulder fit for repeatable performance

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and rotational control are paramount. The 5/16"-24 UNF fine thread configuration provides superior holding power in thin materials and vibration-prone environments, while the knurled hex socket head ensures positive tool engagement during high-torque installations. The Rockwell B55 hardness rating maintains structural integrity under repeated loading cycles, making these shoulder screws ideal for precision machinery, automated assembly systems, and rotating components where exact shoulder diameter tolerances prevent bearing wear and ensure proper component spacing. The corrosion-resistant properties of 18-8 stainless steel extend service life in manufacturing, marine, and chemical processing applications.

Specification Summary & Compliance

This precision shoulder screw features Class 2A thread fit per UNF standards with fine thread spacing for optimal engagement. The shoulder diameter maintains tight tolerances (-0.004" to -0.002") while the shoulder length tolerance ranges from -0.005" to 0.005" for precise component alignment. Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring environmental responsibility and global regulatory acceptance. The right-hand thread direction and standard shoulder fit provide consistent performance across industrial applications requiring reliable fastening solutions.