S-91273A241 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the 5" shoulder with tight ±0.005" length tolerance
• High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Secure and efficient installation with the hex socket drive and knurled head for improved grip
• Reliable thread engagement provided by Class 2A fit 1/2"-13 UNC coarse threads
• Enhanced durability with Rockwell B55 hardness for long service life under load
• Compliance with environmental regulations including RoHS 3 and REACH for global market suitability

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 5" precision shoulder length with minimal tolerance variation ensures exact positioning of moving parts like gears, pulleys, and linkages, reducing wear and maintenance downtime. The 1/2"-13 UNC coarse thread with Class 2A fit provides secure fastening in high-vibration environments, while the 18-8 stainless steel material offers excellent resistance to corrosion and oxidation. Combined with a hex socket knurled head for non-slip installation, this shoulder bolt delivers reliable performance in automation systems, conveyor assemblies, and precision equipment where high-strength and alignment accuracy are paramount.

Specification Summary & Compliance

This shoulder screw features a 1/2" shoulder diameter with a tolerance of -0.004" to -0.002" and a 5" shoulder length held to ±0.005". Threads are 1/2"-13 UNC coarse with Class 2A fit and right-hand direction. Manufactured from 18-8 stainless steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring suitability for regulated industrial applications.