S-90585A659 1/4"-20 x 6" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive 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 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Maximum holding power achieved through fully threaded UNC coarse design and Class 3A precision thread fit
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Secure flush installation featuring standard 82° countersink angle and flat head design for smooth surface finishing
- Reliable drive engagement with 5/32" hex drive providing positive torque transmission and reduced cam-out risk
- Industry-standard compliance meeting ASME B18.3 specifications for consistent performance and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for safe use across regulated industries
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 316 stainless steel flat head screws deliver exceptional performance in corrosive environments where chemical resistance and structural integrity are paramount. The combination of UNC coarse threading and full threading ensures rapid installation and superior pull-out resistance in materials ranging from metals to composites. The 82° countersink angle provides optimal flush mounting in precision machinery, while the hex drive design enables high-torque installation without slippage. These industrial screws solve critical challenges in marine, chemical processing, and food equipment applications where corrosion resistance and regulatory compliance are essential for operational safety and longevity.
Specification Summary & Compliance
Manufactured to exacting dimensional standards with Class 3A thread fit precision and UNC thread specifications. The flat head screw features a head diameter of 0.531" with tolerance of -0.051" to 0", head height of 0.161", and 6" length. Complies with ASME B18.3 manufacturing standards and maintains full conformance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions.
