S-91773A070 1-72 x 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh environments.
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable, long-term fastening.
• Precise and secure thread engagement from 1-72 UNF fine threading and Class 2A fit, minimizing the risk of loosening under vibration.
• Efficient installation and removal with the Phillips No. 0 drive and rounded head design, reducing assembly time.
• Full thread coverage along the 1/2" length ensures maximum grip and load distribution in pre-tapped holes.
• Compliance with major industry standards including ASME B18.6.3, guaranteeing dimensional consistency and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.

Professional Applications & Engineering Value

This 1-72 UNF fine thread screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 stainless steel material, combined with a passivated finish, provides outstanding resistance to oxidation and chemical exposure, making it suitable for applications in electronics, medical devices, and marine equipment where corrosion resistance is paramount. The fine UNF threading and Class 2A fit ensure tight, secure fastening in thin materials or fine-pitch threaded holes, reducing the risk of stripping and maintaining clamp load under dynamic stresses. Its rounded head and Phillips drive facilitate quick, flush installation in confined spaces, enhancing productivity in automated or manual assembly lines. By meeting ASME B18.6.3 specifications, this screw delivers reliable performance and interchangeability, essential for maintaining quality in industrial and OEM manufacturing.

Specification Summary & Compliance

This screw features a 1-72 UNF fine thread with Class 2A fit for precise dimensional accuracy and easy assembly. It is manufactured in compliance with ASME B18.6.3 standards, ensuring consistent quality and performance. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.