S-96640A153 1/4"-20 x 3/4" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Superior holding power and reliability from fully threaded UNC coarse thread design for secure fastening in various materials
• High tensile strength of 80,000 psi and Rockwell B80 hardness ensure durability under heavy loads and vibration
• Precise flush mounting with standard 82° countersink angle and flat head profile for smooth, professional finishes
• Efficient installation using Phillips No. 3 drive, reducing tool slippage and speeding up assembly processes
• Wide industrial compatibility with Class 2A thread fit and right-hand threading for consistent performance in standard applications
• Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH for safe, regulated use in global markets

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The Black-Oxide finish enhances surface protection against moisture and chemicals, extending service life in demanding settings like machinery, automotive, and outdoor equipment. Its fully threaded UNC coarse thread provides maximum grip in wood, metal, and plastic, preventing pull-out under stress. The standard 82° countersink angle ensures a flush fit, reducing snagging and improving aesthetic integration. With a Phillips No. 3 drive, it allows for quick, secure installation, minimizing downtime in production lines. Ideal for heavy-duty applications, this screw combines material resilience with precise engineering to deliver reliable performance in corrosive or high-stress environments.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It meets ASME B18.6.3 specifications for mechanical and dimensional standards, ensuring interoperability in industrial systems. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable usage. The product adheres to defined parameters including a length of 3/4", fully threaded design, and right-hand thread direction, providing reliability for professional fastening needs.