S-91773A068 1-72 x 3/8" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for reliable fastening under stress
• Precision thread engagement with Class 2A fit and UNF fine threads ensuring vibration resistance and secure connections
• Optimized drive performance through Phillips No. 0 drive design providing efficient installation with standard tools
• Full-threaded design maximizing grip length and load distribution across the entire 3/8" length
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Rounded head profile offering smooth surface finish and reduced risk of snagging in precision assemblies

Professional Applications & Engineering Value

These 1-72 UNF fine thread rounded head screws provide critical solutions for precision engineering applications where material integrity and dimensional accuracy are paramount. The combination of 18-8 stainless steel with passivated finish creates exceptional resistance to corrosion and chemical exposure, making them ideal for medical equipment, aerospace components, and electronic enclosures. The UNF fine threading with Class 2A fit ensures minimal backlash and superior vibration resistance in high-precision machinery, while the Phillips drive design enables efficient installation in confined spaces. These fully threaded fasteners distribute mechanical loads evenly across the entire 3/8" length, preventing stress concentration points that could compromise assembly integrity in demanding industrial environments.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerance for precision engagement. The UNF 1-72 fine thread configuration ensures consistent performance in precision applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming absence of restricted substances. Mechanical properties include 100,000 psi tensile strength and Rockwell B100 hardness, validated through rigorous quality control processes.