S-94361A321 10-32 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by the black oxide finish extends service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal backlash, ideal for applications requiring high vibration resistance.
• Knurled socket head with hex drive allows for easy, non-slip installation and removal, improving assembly efficiency and reducing tool wear.
• Alloy steel construction with Rockwell C32 hardness offers excellent durability and wear resistance, minimizing deformation over repeated use.
• Fine 10-32 UNF threads provide enhanced holding power and better load distribution compared to coarse threads, suitable for precision assemblies.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global standards for industrial components.

Professional Applications & Engineering Value

This 10-32 UNF shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The alloy steel material and Rockwell C32 hardness provide exceptional resistance to shear and tensile stresses, preventing premature failure in high-load scenarios. The black oxide finish not only enhances corrosion resistance but also reduces galling during installation, a common issue in industrial applications. With its 1 5/8" shoulder length and standard shoulder fit, it acts as a reliable pivot or spacer in assemblies, ensuring accurate alignment and reducing wear on moving parts. The fine UNF threads and Class 3A fit deliver superior clamping force and vibration resistance, making it ideal for use in robotics, automotive fixtures, and electronic enclosures where precision and reliability are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNF thread standards with a Class 3A fit for high precision. Dimensions include a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002", and a shoulder length of 1 5/8" with a tolerance of -0.005" to 0.005". It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(a) for lead in steel, and is REACH (EC 1907/2006) compliant, ensuring it meets stringent environmental and safety regulations for industrial use.