S-97345A527 1/4"-28 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for reliable performance in harsh chemical and marine environments
• Precise thread engagement with Class 3A fit UNF fine threads ensuring vibration resistance and secure fastening in critical applications
• Enhanced grip and torque application through knurled socket head design with 5/32" hex drive for slip-resistant installation
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B79 hardness for heavy-duty load bearing
• Accurate shoulder positioning with controlled diameter tolerance (-0.004" to -0.002") for precise component alignment
• Extended service life with 35,000 psi minimum shear strength and full compliance with ASME B18.3 manufacturing standards
• Environmental responsibility through RoHS 3 and REACH compliance for sustainable industrial operations

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and corrosion resistance are paramount. The 1/4"-28 UNF fine thread with Class 3A fit provides superior vibration resistance in rotating machinery, automation systems, and precision instruments. The knurled socket head design ensures positive torque transmission during assembly, while the precisely machined shoulder maintains accurate component spacing in bearing mounts, linkages, and pivoting mechanisms. Manufactured from marine-grade 316 stainless steel, this shoulder screw withstands corrosive industrial environments including chemical processing, marine applications, and food processing equipment where moisture and aggressive media are present.

Specification Summary & Compliance

This precision shoulder screw maintains Class 3A thread fit per UNF standards with exacting dimensional control including shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 specifications for socket head shoulder screws, the component meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Mechanical properties include Rockwell B79 hardness and 70,000 psi tensile strength, ensuring reliable performance in demanding industrial applications.