S-90096A338 1/4"-20 x 1 1/2" ASME B18.6.3, SAE J933 Tapping Screws
Tapping 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-strength thread cutting action with Type F design creates precise threads in aluminum, brass, cast iron and sheet metal without pre-tapping
- Enhanced drive stability through external hex head design prevents cam-out and enables high-torque installation
- Integrated flange design provides wider bearing surface for improved load distribution and vibration resistance
- Coarse UNC thread spacing ensures rapid installation and superior holding power in softer materials
- Full threading along 1½" length delivers maximum engagement strength throughout the entire fastener
- Precision-engineered compatibility with standard No. 2 drill bit (0.221") simplifies installation and reduces assembly time
Professional Applications & Engineering Value
This zinc-plated steel tapping screw delivers exceptional engineering value in metal fabrication and assembly operations. The thread cutting Type F design eliminates the need for separate tapping operations, significantly reducing labor costs and installation time when working with aluminum, brass, cast iron, and sheet metal components. The combination of external hex drive and flanged head provides superior clamping force and prevents loosening under vibration, making it ideal for automotive, machinery, and structural applications where reliability is critical. The coarse UNC 1/4"-20 threading ensures rapid installation while maintaining excellent pull-out resistance in both thin and thick materials.
Specification Summary & Compliance
This 1/4"-20 tapping screw features UNC coarse threads with Class 2A fit tolerance and full threading along its 1½" length. Manufactured to meet ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance standards. The product is RoHS 3 (2015/863/EU) compliant and manufactured using zinc-plated steel for corrosion protection. Designed specifically for use with No. 2 drill bit (0.221" diameter) in thread cutting applications across various metal substrates.
