S-97763A317 2-56 x 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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
- Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Precision Class 3A thread fit provides secure fastening with minimal risk of stripping or cross-threading
- Hex drive design with 0.050" drive size allows for high-torque installation and easy maintenance access
- Fully threaded coarse UNC pattern enables faster installation and superior holding power in various materials
- Rockwell B55 hardness rating maintains thread integrity and prevents deformation during repeated use
- Rounded button head profile offers a low-profile, aesthetically pleasing finish while reducing snag hazards
Professional Applications & Engineering Value
These 2-56 UNC rounded head screws deliver exceptional engineering value in precision assembly applications where corrosion resistance and high-strength fastening are critical. The Black-Oxide 18-8 Stainless Steel construction provides superior protection against rust and chemical exposure, making them ideal for electronics enclosures, medical devices, and outdoor equipment. The combination of Class 3A thread fit and coarse UNC threading ensures rapid installation with exceptional pull-out resistance, while the hex drive design accommodates high torque applications without cam-out issues. These fully threaded fasteners maintain consistent clamping force across the entire engagement length, solving common problems of joint loosening in vibrating environments.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerances for precision alignment. Features 2-56 UNC coarse threads with right-hand orientation and full threading along the 1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. The Rockwell B55 hardness and 70,000 psi tensile strength meet rigorous industrial standards for mechanical performance and durability.
