S-90283A128 5-40 x 1/2" 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 demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical stress and vibration
- Rockwell B60 hardness provides excellent wear resistance and prevents thread deformation during installation
- Class 2A thread fit with UNC coarse threading enables quick assembly and reduces cross-threading risks
- Fully threaded design offers maximum grip length and uniform load distribution across connected materials
- Slotted pan head design allows for easy installation with standard screwdrivers while maintaining a low-profile appearance
- Compliance with ASME B18.6.3 guarantees consistent dimensional accuracy and interchangeability
Professional Applications & Engineering Value
These 5-40 UNC zinc-plated steel screws deliver critical performance advantages in industrial assembly applications where corrosion resistance and mechanical reliability are paramount. The coarse thread configuration provides superior holding power in softer materials and plastics, while the rounded pan head with slotted drive accommodates both automated and manual installation processes. Engineered with Rockwell B60 hardness and 60,000 psi tensile strength, these fasteners maintain structural integrity in high-vibration environments common in machinery, electrical enclosures, and automotive components. The zinc plating creates a sacrificial barrier against oxidation, making them ideal for applications exposed to humidity or chemical agents without compromising the Class 2A thread fit precision.
Specification Summary & Compliance
These rounded head screws feature precise 1/2" length with 5-40 UNC coarse threads maintaining Class 2A thread fit tolerances for consistent engagement. Manufacturing conforms to ASME B18.6.3 specifications for dimensional accuracy. The products are fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility in industrial supply chains.
