S-91054A230 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Corrosion & Wear Resistance – 18-8 stainless steel construction with TiCN coating provides superior durability in harsh environments, reducing replacement frequency.
• High Tensile Strength for Demanding Loads – 70,000 psi tensile strength ensures reliable performance under high-stress conditions, minimizing failure risks.
• Precise Shoulder Alignment – Tight tolerances on shoulder diameter and length (±0.002" to 0.003") enable accurate component positioning and smooth rotational movement.
• Easy Installation with Hex Drive – 5/32" hex socket drive allows for secure, high-torque fastening without slipping, speeding up assembly processes.
• Wide Industrial Compatibility – UNC coarse threads with Class 2A fit ensure easy engagement and interchangeability in standard machinery and equipment.
• Consistent Hardness & Stability – Rockwell B55 hardness maintains structural integrity under repeated use, preventing deformation.
• Compliant with Global Standards – Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries without hazardous substances.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and wear challenges in industrial assemblies. The 18-8 stainless steel base offers excellent corrosion resistance, while the TiCN coating significantly reduces friction and extends service life in high-movement applications like rotating shafts, pivots, and bearing supports. The 5/16" shoulder diameter with precise tolerances ensures components remain securely positioned, eliminating misalignment and reducing maintenance downtime. With 1/4-20 UNC coarse threads and a Class 2A thread fit, it provides reliable fastening in machinery, automotive, and automation systems, where vibration resistance and repeatability are essential. Its 70,000 psi tensile strength and hex drive design further support heavy-duty use, making it a trusted solution for engineers seeking durability and performance.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent engagement. Shoulder dimensions are manufactured to precise tolerances: diameter within -0.002" to 0" and length within 0" to 0.003". The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from restricted substances. Mechanical properties include a tensile strength of 70,000 psi and Rockwell B55 hardness, confirming its suitability for industrial applications requiring reliability and regulatory conformity.