S-90096A448 3/8"-16 x 2 1/2" ASME B18.6.3, SAE J933 Tapping Screws

Tapping Screws

0491FA00134 Tapping Screws
0491FA00134 Tapping Screws

Image may differ from product. See technical specification for details.

Part No.
Part No. 0491FA00134
Equivalent to mcmaster :
90096A448

Basic Information

Tapping Screw Type F
Screw Features Flanged
System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 0.563"
Head Height 0.358"

Dimensions

Length 2 1/2"
Flange Diameter 0.78"
Shank Cross Section Round

Thread Parameters

Thread Type UNC
Thread Size 3/8"-16
Screw Size 3/8"
Thread Diameter 0.375"
Thread Spacing Coarse
Thread Direction Right Hand
Threading Fully Threaded
Locking Type Serrations

Tip & Drive Parameters

Tip Type Blunt
Drive Style External Hex
Drill Bit Size R
Drill Bit Diameter 0.339"
Tapping Method Thread Cutting

Material & Strength

Material Zinc-Plated Steel

Temperature & Environment

For Use In Aluminum, Brass, Cast Iron, Sheet Metal
RoHS Compliant
Specifications Met ASME B18.6.3, SAE J933
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with zinc-plated steel construction, ensuring longevity in demanding industrial environments.
  • High-torque installation capability via the external hex drive, allowing for secure fastening without stripping.
  • Reliable vibration resistance from the serrated locking flange, preventing loosening under dynamic loads.
  • Efficient thread-cutting performance in materials like aluminum and cast iron, reducing installation effort and time.
  • Versatile application compatibility across aluminum, brass, cast iron, and sheet metal, minimizing inventory needs.
  • Full-thread engagement for maximum grip strength and uniform stress distribution in assemblies.
  • Compliance with industry standards including ASME B18.6.3 and RoHS 3, ensuring quality and environmental safety.

Professional Applications & Engineering Value

This 3/8"-16 UNC flanged hex tapping screw is engineered to address common challenges in metal fabrication and assembly, such as material brittleness and vibration-induced failures. The zinc-plated steel material offers excellent corrosion protection, while the thread-cutting design (Type F) enables self-tapping in tough substrates like cast iron and aluminum without pre-drilling in many cases. The external hex drive ensures efficient torque transmission, reducing the risk of tool slippage during high-stress installations. Combined with a serrated locking flange, it provides enhanced resistance to loosening in dynamic applications, making it ideal for heavy-duty industrial fastening in machinery, automotive, and construction sectors where reliability is critical.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a size of 3/8"-16 and a length of 2 1/2", ensuring precise fit in accordance with ASME B18.6.3 specifications. It features a fully threaded design with a blunt tip and round shank for consistent performance. Compliance with RoHS 3 (2015/863/EU) confirms it is free from hazardous substances, supporting safe and sustainable industrial use.

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