S-91327A252 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent Nylon Patch thread locker maintains secure fastening from -50° to 250°F, preventing loosening in high-stress environments
• Exceptional corrosion resistance from 18-8 Stainless Steel construction ensures long-term reliability in harsh industrial conditions
• Precision Class 3A thread fit delivers superior mating accuracy and consistent clamping force in critical assemblies
• High tensile strength of 70,000 psi provides reliable performance under heavy mechanical loads and repeated stress
• Knurled socket head design offers improved grip for installation and removal while preventing tool slippage
• Generous 1½" shoulder length accommodates multiple component thicknesses and provides precise pivot points in mechanical linkages
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This 1/2"-13 UNC shoulder screw with permanent Nylon Patch thread locker addresses critical vibration-induced loosening challenges in industrial machinery, automation systems, and precision equipment. The 18-8 Stainless Steel construction combined with passivated finish provides superior corrosion resistance for demanding environments including manufacturing facilities, food processing equipment, and outdoor applications. The Class 3A thread fit ensures precise alignment in assemblies requiring exact positioning, while the knurled socket head facilitates secure tool engagement during installation in confined spaces. The integrated thread locking technology maintains clamping force integrity across temperature fluctuations from -50° to 250°F, eliminating the need for secondary locking components and reducing assembly time in high-volume production environments.

Specification Summary & Compliance

This precision shoulder screw features 1/2"-13 UNC coarse threads with Class 3A fit for superior dimensional accuracy, complemented by a 5/8" shoulder diameter with tight tolerance control (-0.004" to -0.002"). The component meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental responsibility and regulatory acceptance for global industrial applications. Manufactured to exacting specifications with 70,000 psi tensile strength and Rockwell B55 hardness, this fastener delivers reliable performance in demanding mechanical systems requiring precision alignment and vibration resistance.