S-90821A559 Length 1 1/2" Tapping Screws
Tapping Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Eliminates pre-drilling requirements with integrated No. 3 drilling tip that penetrates up to 0.21" thickness
- Superior corrosion resistance through galvanic barrier coated 18-8 stainless steel construction
- Enhanced installation efficiency with external hex drive design for secure tool engagement
- Stronger thread retention achieved through thread forming technology that creates permanent mating threads
- Eliminates need for separate washers with integrated flange design that distributes clamping force
- Full-length threading provides maximum grip along the entire shank for superior holding power
- Optimized for challenging materials specifically engineered for aluminum and sheet metal applications
Professional Applications & Engineering Value
These flanged hex head tapping screws deliver exceptional value in industrial assembly environments where aluminum and sheet metal components require reliable fastening solutions. The galvanic barrier coated 18-8 stainless steel construction prevents galvanic corrosion when joining dissimilar metals, extending service life in demanding conditions. The thread forming design creates stronger, more durable threads in parent material without chip formation, eliminating cleanup requirements and ensuring consistent clamp load. The integrated No. 3 drilling tip and external hex drive combine to provide rapid installation without secondary operations, significantly reducing assembly time and labor costs in high-volume manufacturing and metal fabrication applications.
Specification Summary & Compliance
Manufactured to BSD tapping screw standards with precise 1/4"-14 thread configuration and right-hand thread direction. Features fully threaded design with 3/8" hex head and 0.52" flange diameter for optimal load distribution. The thread forming technology ensures consistent performance while the galvanic barrier coating on 18-8 stainless steel provides enhanced corrosion protection. Engineered for maximum drilling capacity of 0.21" thickness in aluminum and sheet metal applications without pre-drilling requirements.
