S-90969A210 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability with alloy steel construction and Rockwell C30 hardness for reliable performance in demanding industrial environments
• Superior corrosion resistance through black oxide finish, extending service life and reducing maintenance requirements
• Precision thread engagement with Class 3A fit ensuring secure fastening and vibration resistance in critical applications
• High tensile strength of 140,000 psi provides exceptional load-bearing capacity for heavy-duty mechanical assemblies
• Optimized space utilization with ultra-low socket head profile and knurled texture for easy installation in confined areas
• Reliable shoulder positioning with precise diameter and length tolerances for accurate component alignment
• Industry compliance assurance meeting RoHS 3 and REACH regulations for safe use across various sectors

Professional Applications & Engineering Value

This alloy steel shoulder screw with black oxide finish delivers critical engineering solutions for precision machinery and industrial equipment. The 1/4"-20 UNC coarse thread with Class 3A fit provides superior thread engagement, eliminating play in rotating assemblies while the precisely machined shoulder maintains accurate component alignment in pivoting mechanisms, bearing mounts, and linkage systems. The ultra-low socket head profile with knurled texture ensures secure tool engagement and easy installation in space-constrained applications. With 140,000 psi tensile strength and Rockwell C30 hardness, this shoulder screw withstands heavy loads and repetitive motion in automotive, aerospace, and manufacturing equipment, reducing maintenance downtime and extending service intervals.

Specification Summary & Compliance

This precision shoulder screw features 1/4"-20 UNC coarse threads with Class 3A thread fit for exacting dimensional requirements. The shoulder diameter maintains tight tolerances of -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" ensuring consistent performance. Manufactured from alloy steel with black oxide finish, the component complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental and safety standards for industrial applications.