S-96640A296 2-56 x 5/16" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel construction, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable fastening under significant mechanical stress
- Rockwell B80 hardness provides excellent durability and resistance to wear over repeated use
- Fully threaded design offers maximum grip and uniform load distribution along the entire length
- Class 2A thread fit with UNC coarse threading enables quick assembly and reduces cross-threading risks
- Phillips No. 1 drive allows for efficient installation with standard tools while minimizing cam-out
- Standard flat head profile with 100° countersink ensures flush mounting for clean, aerodynamic surfaces
Professional Applications & Engineering Value
These 2-56 UNC flat head machine screws deliver critical performance advantages in precision engineering applications. The Black-Oxide 18-8 Stainless Steel construction provides superior corrosion resistance compared to plain carbon steel, making them ideal for electronics enclosures, automotive components, and marine equipment where moisture exposure is common. The combination of 80,000 psi tensile strength and Rockwell B80 hardness ensures these fully threaded screws maintain clamp force under vibration and thermal cycling. The Phillips No. 1 drive and coarse UNC threading significantly reduce installation time in production environments while the standard flat head profile creates seamless finishes in countersunk applications.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent quality and interchangeability. These 5/16" length screws feature right-hand UNC coarse threads and meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmentally responsible manufacturing. The Black-Oxide surface treatment enhances both corrosion protection and aesthetic appearance while maintaining dimensional precision throughout the fully threaded fastener length.
