S-91781A164 1-72 x 1/8" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• Precise flush mounting enabled by the undercut flat head and 82° countersink angle for seamless surface integration
• Superior load-bearing capability with 80,000 psi tensile strength and Rockwell B80 hardness for reliable fastening
• Accurate thread engagement through Class 2A fit and UNF fine threads, reducing cross-threading risks
• Broad industrial compliance meeting ASME B18.6.3 standards and environmental regulations like RoHS 3 & REACH
• Optimized drive control with slotted design for straightforward installation using standard tools
• Full-threaded design ensures maximum grip along the entire 1/8" length for enhanced holding power

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 1-72 UNF flat head screws address critical challenges in precision assembly. The 18-8 stainless steel material, combined with a passivated finish, provides lasting protection against oxidation and chemical exposure, making them suitable for electronics, aerospace, and marine components. The undercut head profile and 82° countersink angle allow for a flush fit, eliminating protrusions that could interfere with moving parts or aesthetic requirements. With fine threading and Class 2A thread fit, these screws ensure tight, vibration-resistant connections in compact assemblies where space is limited and reliability is paramount. Their compliance with ASME B18.6.3 guarantees consistent quality, reducing the risk of fastener failure in critical applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNF fine threads (1-72 size) with a right-hand direction. Manufacturing follows ASME B18.6.3 specifications, ensuring uniformity in head diameter (0.137"), length (1/8"), and countersink angle (82°). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe use in global markets.