S-97768A177 6-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Enhanced durability and wear resistance provided by the black oxide finish, which also reduces light reflection.
• Precise location and smooth rotation of mating parts ensured by the integral shoulder with standard fit.
• High-strength performance with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for demanding applications.
• Secure, high-precision assembly guaranteed by the Class 3A thread fit, offering tighter tolerances than standard fits.
• Easy and secure installation with a hex socket drive and knurled head for improved grip during tightening.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring suitability for global markets.

Professional Applications & Engineering Value

This 6-32 UNC shoulder screw is engineered to provide a robust and precise pivot, bearing surface, or axle in assemblies where components must rotate or be accurately spaced. The 18-8 stainless steel material offers excellent resistance to corrosion, preventing failure in humid or chemically aggressive industrial applications. The black oxide finish not only adds an extra layer of protection against wear but also minimizes galling. The Class 3A thread fit and the precisely machined shoulder work in tandem to eliminate play and misalignment, solving common issues like component wobble and premature wear in machinery, automotive, and precision instrument assemblies. The knurled head and hex socket drive ensure that the fastener can be securely installed even in confined spaces.

Specification Summary & Compliance

This shoulder screw conforms to UNC coarse thread standards with a size of 6-32 and a high-precision Class 3A thread fit. The shoulder diameter is 3/16" with a tight tolerance of -0.004" to -0.002", and the shoulder length is 1/8" with a tolerance of -0.005" to 0.005". The component is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B55. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.