S-90096A378 8-32 x 2" ASME B18.6.3, SAE J933 Tapping Screws

Tapping Screws

0491FA00083 Tapping Screws
0491FA00083 Tapping Screws

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

Part No.
Part No. 0491FA00083
Equivalent to mcmaster :
90096A378

Basic Information

Tapping Screw Type F
Screw Features Flanged
System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 1/4"
Head Height 0.141"

Dimensions

Length 2"
Flange Diameter 0.348"
Shank Cross Section Round

Thread Parameters

Thread Type UNC
Thread Size 8-32
Screw Size No. 8
Thread Diameter 0.164"
Thread Spacing Coarse
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Blunt
Drive Style External Hex/Slotted
Drill Bit Size No. 26
Drill Bit Diameter 0.147"
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, extending service life in demanding industrial environments.
  • Efficient thread cutting action (Type F) creates precise mating threads in aluminum, brass, cast iron, and sheet metal without pre-tapping.
  • High-torque capability from the external hex drive and flanged head design, providing secure fastening and preventing head stripping.
  • Quick installation with UNC coarse threading and full thread length, enabling rapid assembly and reduced labor time.
  • Reliable material compatibility for use with a No. 26 drill bit (0.147"), ensuring proper hole sizing and strong thread engagement.
  • Enhanced vibration resistance due to the flanged design, which distributes load and maintains joint integrity.
  • Assured quality and safety by meeting ASME B18.6.3 standards and RoHS 3 compliance for regulated applications.

Professional Applications & Engineering Value

These 8-32 zinc-plated steel tapping screws are engineered to solve common fastening challenges in metal fabrication and assembly. The thread cutting design (Type F) and UNC coarse thread enable self-tapping into aluminum, brass, cast iron, and sheet metal without pre-formed threads, eliminating the need for separate tapping operations and reducing assembly steps. The external hex drive and flanged head provide high torque transmission and increased bearing surface, preventing loosening under vibration—critical in automotive, machinery, and HVAC systems. Made from durable zinc-plated steel, they offer excellent corrosion protection, ensuring long-term reliability in harsh conditions while maintaining ASME B18.6.3 dimensional accuracy for consistent performance.

Specification Summary & Compliance

This product features UNC coarse threads (8-32 size) with a thread diameter of 0.164" and full threading along the 2" length. It complies with ASME B18.6.3 specifications (referencing SAE J933) for dimensional standards and thread form. The screws are RoHS 3 (2015/863/EU) Compliant, ensuring they are free from hazardous substances, and are designed for use with a No. 26 drill bit (0.147" diameter) as specified for optimal performance in thread cutting applications.

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