S-90585A139 10-32 x 1 3/4" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction with passivated surface treatment
• Exceptional thread engagement and vibration resistance achieved through Class 3A UNF fine threading with full thread coverage
• High-strength performance under load with 70,000 psi tensile strength and Rockwell B55 hardness rating
• Precise flush mounting capability featuring standard 82° countersink angle and flat head design
• Reliable industrial compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
• Secure installation and removal enabled by hex drive design with 1/8" drive size
• Environmental regulation compliance with RoHS 3 and REACH standards for safe usage

Professional Applications & Engineering Value

These 316 stainless steel flat head screws deliver critical performance advantages in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The combination of UNF fine threading with Class 3A fit ensures superior vibration resistance and thread engagement in precision equipment, while the passivated finish significantly enhances corrosion protection in chemical processing, marine, and food processing applications. The 82° countersink angle provides optimal flush mounting for applications requiring smooth surface profiles, and the hex drive configuration allows for high-torque installation without slippage. Engineered to ASME B18.3 standards, these screws maintain dimensional consistency for reliable replacement and assembly processes across industrial machinery, structural components, and precision instruments.

Specification Summary & Compliance

This 10-32 UNF flat head screw features precise dimensional tolerances including Class 3A thread fit for superior engagement, manufactured to ASME B18.3 specifications (ASTM F879) ensuring interchangeability and reliability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for regulated industries and international markets. Critical dimensions include 1-3/4" length, 0.411" head diameter, and standard 82° countersink angle for consistent performance across applications.