S-92453A106 4-40 x 1/4" ASME B18.6.3 Brass Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance due to brass construction, ensuring long-term reliability in humid or demanding industrial environments.
• High tensile strength of 50,000 psi provides exceptional load-bearing capacity for secure fastening in critical assemblies.
• Class 2A thread fit with UNC coarse spacing enables quick, easy installation and reduces cross-threading risks.
• Fully threaded design offers consistent engagement along the entire 1/4" length for versatile mounting depths.
• Rockwell B40 hardness enhances durability and wear resistance, minimizing deformation during repeated use.
• Slotted rounded head allows for straightforward manual installation with standard screwdrivers, simplifying maintenance.
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to rigorous quality, safety, and environmental standards.

Professional Applications & Engineering Value

These 4-40 UNC brass slotted rounded head screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The brass material inherently resists rust and galvanic corrosion, making these screws ideal for electrical enclosures, marine equipment, and plumbing systems where moisture exposure is a concern. The coarse UNC threading and Class 2A fit provide reliable engagement in soft materials or pre-tapped holes, reducing installation time and improving throughput in high-volume production lines. With a fully threaded design and right-hand thread direction, they ensure uniform stress distribution and secure fastening in applications ranging from machinery components to consumer electronics, delivering consistent performance under 50,000 psi tensile loads.

Specification Summary & Compliance

These screws adhere to ASME B18.6.3 specifications for dimensional accuracy and thread geometry, with a Class 2A thread fit ensuring proper clearance and interchangeability. The UNC coarse thread with a size of 4-40 and 1/4" length provides standardized compatibility. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms the absence of hazardous substances, supporting environmental and workplace safety requirements.