S-97763A344 1/4"-20 x 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments.
• Superior thread engagement and vibration resistance due to Class 3A thread fit and UNC coarse threads for reliable fastening.
• High tensile strength of 70,000 psi ensures dependable performance under significant mechanical stress.
• Easy installation and removal with a 5/32" hex drive and low-profile rounded button head design.
• Consistent holding power from the fully threaded shank, providing maximum grip along the entire length.
• Durable material hardness (Rockwell B55) offers excellent wear resistance and long service life.
• Broad regulatory compliance including ASME B18.3, RoHS 3, and REACH for safe, standardized use.

Professional Applications & Engineering Value

This 1/4"-20 UNC Rounded Head Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress demands. The Black-Oxide 18-8 Stainless Steel construction provides a protective layer that significantly enhances corrosion resistance, making it suitable for outdoor, marine, or chemically exposed settings. The Class 3A thread fit and coarse UNC threading ensure tight, secure fastenings that resist back-out under dynamic loads, which is critical in machinery, automotive assemblies, and structural frameworks. Its fully threaded design maximizes surface contact for superior clamping force, while the hex drive and rounded button head allow for efficient installation in confined spaces without compromising on torque application. These features make it a reliable choice for engineers and procurement specialists seeking durable, compliant fasteners for demanding industrial applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 3A thread fit for tight tolerances and reliable assembly. It conforms to ASME B18.3 specifications, ensuring consistent manufacturing quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various markets without hazardous substances. Thread specifications include UNC coarse threads, right-hand direction, and a 1/4"-20 thread size, designed for robust performance in industrial fastening systems.