S-91273A919 5/16"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering a tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable, high-load applications.
• Precise alignment and smooth rotation enabled by the 3/4" shoulder with controlled diameter tolerance, reducing wear on mating parts.
• Secure and efficient installation with a 5/32" hex socket drive and knurled head for superior grip and torque application.
• Fine UNF thread (5/16"-24) with Class 2A fit ensures vibration resistance and a secure, precise fastening connection.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets.
• Consistent performance and durability backed by a Rockwell B55 hardness rating, maintaining integrity under repeated stress.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and industrial machinery. The 5/16"-24 UNF fine thread provides excellent resistance to loosening under vibration, making it ideal for dynamic equipment. The 3/4" shoulder length acts as a precise pivot or spacer, ensuring accurate alignment in assemblies like linkages, bearings, and gears, which minimizes misalignment and wear. The hex socket drive and knurled head facilitate secure installation in confined spaces, enhancing assembly efficiency. Manufactured from corrosion-resistant 18-8 stainless steel with high tensile strength, it delivers long-term reliability in demanding applications such as automotive, aerospace, and electronic enclosures, reducing maintenance and downtime.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit for standard clearance and ease of assembly, with a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" ensuring precision. It adheres to UNF thread standards and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for environmentally regulated and high-performance industrial use.