S-94173A302 1/4"-20 x 4" 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Corrosion-resistant black-oxide coating on alloy steel enhances durability and longevity in harsh environments, minimizing maintenance needs.
• External 12-point drive and head allows for high-torque installation with standard tools, improving assembly efficiency and reducing slippage.
• UNC coarse threading with Class 2A fit provides quick engagement and secure fastening, ideal for vibration-prone settings.
• Partially threaded design with integrated flange eliminates the need for separate washers, simplifying installation and providing consistent clamping force.
• Rockwell C38 hardness offers excellent wear resistance, maintaining thread integrity over repeated use.
• Versatile 4-inch length accommodates a wide range of material thicknesses, offering flexibility in various assembly scenarios.

Professional Applications & Engineering Value

Engineered for demanding environments, this 12-point screw combines black-oxide alloy steel with robust UNC coarse threading to address common industrial challenges like vibration loosening and corrosion. The external 12-point drive enables secure, high-torque applications in machinery, automotive, and construction sectors, where 170,000 psi tensile strength ensures joint integrity under heavy loads. Its partially threaded and flanged design streamlines assembly, reducing component count and installation time while the Class 2A thread fit guarantees precise engagement, minimizing the risk of cross-threading in coarse-thread applications.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Manufactured from alloy steel with a black-oxide surface treatment, it meets industry specifications for hardness (Rockwell C38) and tensile strength (170,000 psi). Compliant with RoHS and REACH environmental directives, it is suitable for global industrial use, ensuring reliability and safety in accordance with common engineering benchmarks.