S-91771A587 5/16"-18 x 1 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength with 80,000 PSI tensile strength and Rockwell B80 hardness for reliable load-bearing performance
- Precision thread engagement with Class 2A UNC coarse threads ensuring secure, vibration-resistant fastening
- Streamlined installation featuring a standard 82° countersink angle and No. 4 Phillips drive for flush, efficient assembly
- Full-threaded design providing maximum grip length and uniform stress distribution across the entire fastener
- Regulatory compliance meeting ASME B18.6.3 manufacturing standards for consistent quality and dimensional accuracy
- Environmental safety with RoHS 3 and REACH compliance, ensuring suitability for regulated industries
Professional Applications & Engineering Value
These 5/16"-18 UNC Flat Head Phillips Screws deliver critical performance in demanding applications where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction prevents oxidation in humid, chemical, or marine environments, while the 80,000 PSI tensile strength withstands high-stress conditions in machinery, structural frames, and equipment assembly. The fully threaded right-hand design with Class 2A thread fit ensures rapid installation and reliable clamping force in metal fabrication, automotive components, and industrial enclosures. The 82° countersink angle and flat head profile provide a smooth, flush finish that eliminates protrusions in precision applications.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit and UNC coarse threads (5/16"-18). Features include a 1-1/2" length, No. 4 Phillips drive, and standard 82° countersink angle. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial and consumer applications.
