S-90273A119 4-40 x 1 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws
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 zinc plating for extended service life in demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical loads
- Precision Class 2A thread fit guarantees smooth assembly and consistent engagement with mating components
- 82° countersink angle design provides flush mounting for improved aesthetics and reduced snag hazards
- Rockwell B70 hardness rating delivers excellent durability and resistance to wear during installation
- Coarse UNC threading enables faster installation and reduced cross-threading risks in production environments
- Full threading along the 1-1/2" length allows for maximum adjustment flexibility and holding power
Professional Applications & Engineering Value
These 4-40 UNC flat head screws with zinc-plated steel construction address critical engineering challenges in industrial assembly. The Phillips drive design ensures secure tool engagement while the 82° countersink angle creates seamless surface integration, eliminating protrusions in machinery and equipment. The coarse thread configuration provides superior performance in softer materials and faster installation times on production lines. With 60,000 psi tensile strength and Rockwell B70 hardness, these fasteners maintain structural integrity in vibration-prone applications, making them ideal for automotive assemblies, electrical enclosures, and machinery manufacturing where reliability and compliance with industrial standards are paramount.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with precision Class 2A thread fit tolerances for consistent performance. These UNC thread screws feature standardized dimensions including 1-1/2" length and 4-40 thread size. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global industrial markets.
