S-91781A055 0-80 x 1/4" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh environments
• Exceptional tensile strength rated at 80,000 psi for reliable performance in high-stress applications
• Precision fine threading (UNF 0-80) with Class 2A fit for secure, vibration-resistant fastening in delicate assemblies
• Optimal flush mounting thanks to the standard 82° countersink angle and flat head design for smooth surface finishes
• Consistent dimensional accuracy meeting ASME B18.6.3 specifications, ensuring interchangeability and ease of installation
• Enhanced durability with Rockwell B80 hardness, providing excellent wear resistance over repeated use
• Broad regulatory compliance including RoHS 3 and REACH, making them suitable for global industrial and electronic applications

Professional Applications & Engineering Value

These 0-80 UNF flat head screws are engineered to address critical challenges in precision industries such as electronics, aerospace, and medical devices. The 18-8 stainless steel material combined with a passivated finish offers superior resistance to oxidation and chemical exposure, preventing failure in corrosive settings. The fine thread design and Class 2A thread fit ensure tight, secure connections that resist loosening under vibration, which is essential for sensitive instrumentation and machinery. With a standard 82° countersink angle, these screws sit flush with surfaces, eliminating protrusions that could interfere with assembly aesthetics or function. Fully compliant with ASME B18.6.3, they provide reliable performance in applications demanding exact tolerances and high tensile strength, reducing maintenance needs and downtime.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNF fine threading with a size of 0-80. Manufactured in accordance with ASME B18.6.3, it ensures reliability in industrial fastening. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms its suitability for environmentally sensitive and global markets, free from hazardous substances.