S-8077A314 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and black oxide finish for extended service life in harsh environments
• Enhanced grip and handling through the knurled head design, preventing tool slippage during installation
• High mechanical reliability with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and spacing enabled by the 1/2" diameter shoulder with tight tolerances for consistent performance
• Easy installation and removal using standard 1/4" hex tools with the socket head design
• Secure thread engagement with Class 3A UNC coarse threads ensuring vibration resistance and durability
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS and REACH

Professional Applications & Engineering Value

This shoulder screw delivers exceptional engineering value in precision assembly applications where alignment and rotational control are critical. The 316 stainless steel material provides outstanding corrosion resistance in chemical processing, marine, and food processing environments, while the black oxide finish adds an extra layer of protection against oxidation. The 4-1/4" shoulder length serves as a precise pivot point or spacer in machinery, eliminating the need for additional bushings or spacers. The Class 3A thread fit and UNC coarse thread pattern ensure reliable performance in high-vibration industrial equipment, reducing maintenance requirements and downtime. The combination of knurled head texture and hex socket drive provides secure tool engagement for consistent torque application in confined spaces.

Specification Summary & Compliance

This shoulder screw features precision Class 3A thread fit with UNC coarse thread specification (3/8"-16) and right-hand thread direction. The shoulder diameter maintains tight tolerance of -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" for exacting applications. Manufactured to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The mechanical properties include Rockwell B79 hardness with verified 70,000 psi tensile strength and 35,000 psi minimum shear strength ratings.