S-96640A058 4-40 x 1/2" 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
- Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel for extended service life in harsh environments
- Exceptional tensile strength rated at 80,000 psi ensures reliable fastening under high-stress industrial conditions
- Precision Class 2A thread fit with UNC coarse threading provides smooth installation and vibration resistance
- 82° countersink angle delivers flush mounting for clean, professional finishes in assembled products
- Phillips drive design enables efficient installation with standard tools while minimizing cam-out risks
- Full threading along 1/2" length offers maximum grip range and adjustment flexibility
- Rockwell B80 hardness maintains structural integrity through repeated use and disassembly
Professional Applications & Engineering Value
These 4-40 UNC flat head screws deliver critical performance advantages for industrial assembly applications where corrosion resistance, strength, and regulatory compliance are paramount. The Black-Oxide 18-8 Stainless Steel construction provides superior protection against oxidation and chemical exposure, making them ideal for electronics enclosures, machinery panels, and outdoor equipment. The 82° countersink angle ensures seamless flush mounting in precision components, while the Phillips drive facilitates rapid installation in high-volume production environments. With fully threaded design and coarse UNC threading, these screws maintain secure fastening in vibration-prone applications, reducing maintenance requirements and downtime across manufacturing, automotive, and electrical industries.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerances for consistent performance. These 1/2" flat head screws feature 4-40 UNC coarse threads with right-hand orientation and standard flat head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets.
