S-94361A122 1/4"-28 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 140,000 psi tensile strength and Rockwell C32 hardness, ideal for high-stress industrial applications
• Precise thread engagement and reliable fastening due to Class 3A thread fit and UNF fine threads, minimizing the risk of loosening under vibration
• Enhanced corrosion resistance from the black oxide finish, extending service life in demanding environments
• Secure, non-slip installation enabled by the knurled socket head and 5/32" hex drive, allowing for high-torque application without stripping
• Accurate alignment and spacing provided by the precisely toleranced shoulder diameter and length, ensuring consistent performance in assemblies
• Broad industrial compliance with RoHS 3 and REACH regulations, making it suitable for global supply chains and sensitive applications
• Right-hand thread design for standard installation and ease of use in common machinery and equipment

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The Class 3A thread fit and UNF fine threads ensure tight, secure connections that resist loosening in high-vibration environments like automotive, aerospace, and heavy machinery. The black oxide finish adds a layer of corrosion resistance, protecting the screw from moisture and chemicals without compromising dimensional accuracy. Its knurled socket head and robust shoulder diameter provide stable rotational control and precise component spacing, reducing wear and misalignment in rotating parts, linkages, and jigs. Ideal for applications requiring reliable high tensile strength and compliance with international standards, this screw delivers consistent performance in demanding industrial settings.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005". It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety compliance for industrial use.