S-90283A112 4-40 x 5/8" ASME B18.6.3 Steel Pan Head Slotted Screws
Steel Pan Head Slotted 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-plated steel construction, extending service life in harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under heavy loads and vibration
- Rockwell B60 hardness provides excellent wear resistance and durability for repeated use
- Class 2A thread fit with UNC coarse threading enables quick assembly and reduces cross-threading risks
- Fully threaded design offers maximum grip and holding power across the entire 5/8" length
- Slotted pan head design allows easy installation with standard screwdrivers while maintaining a low profile
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality consistency and environmental safety
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver critical performance advantages in industrial settings where corrosion resistance and mechanical strength are paramount. The zinc-plated steel construction protects against oxidation in humid or chemical-exposed environments, while the Rockwell B60 hardness maintains thread integrity during repeated installations. The slotted pan head design provides reliable torque transmission without specialized tools, making them ideal for maintenance operations and equipment assembly. With coarse UNC threading and Class 2A fit, these fully threaded screws ensure secure fastening in metal, plastic, and composite materials commonly found in electronics enclosures, machinery panels, and automotive components. Their compliance with ASME B18.6.3 standards guarantees dimensional consistency for interchangeable use across production lines.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (4-40 size) and right-hand thread direction. These 5/8" length screws feature a standard rounded pan head profile with slotted drive style. Full compliance with ASME B18.6.3 manufacturing specifications, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) regulations for chemical safety.
