S-90096A585 5/16"-18 x 1 1/4" ASME B18.6.3, SAE J933 Tapping Screws

Tapping Screws

0491FA00149 Tapping Screws
0491FA00149 Tapping Screws

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

Part No.
Part No. 0491FA00149
Equivalent to mcmaster :
90096A585

Basic Information

Tapping Screw Type F
Screw Features Flanged
System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 1/2"
Head Height 0.285"

Dimensions

Length 1 1/4"
Flange Diameter 0.676"
Shank Cross Section Round

Thread Parameters

Thread Type UNC
Thread Size 5/16"-18
Screw Size 5/16"
Thread Diameter 0.313"
Thread Spacing Coarse
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Blunt
Drive Style External Hex
Drill Bit Size K
Drill Bit Diameter 0.281"
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 for extended service life in demanding environments
  • Excellent material compatibility with thread-cutting Type F design that securely fastens aluminum, brass, cast iron, and sheet metal
  • High-torque installation capability through external hex drive design for secure tightening and reduced stripping risk
  • Enhanced load distribution with integrated flange design that eliminates the need for separate washers
  • Reliable thread engagement with coarse UNC thread spacing that provides superior holding power in various materials
  • Full-length threading ensures maximum grip strength along the entire screw length for secure fastening
  • Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance

Professional Applications & Engineering Value

These 5/16"-18 UNC tapping screws deliver exceptional engineering value in industrial fastening applications where material integrity and joint reliability are paramount. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength. The Type F thread-cutting design eliminates the need for pre-tapped holes, significantly reducing installation time and labor costs in aluminum, brass, cast iron, and sheet metal assemblies. The combination of coarse thread spacing and external hex drive ensures quick installation with standard tools while providing superior resistance to vibration loosening. These features make these screws ideal for construction, manufacturing, and heavy equipment applications where durable, reliable fastening solutions are required.

Specification Summary & Compliance

This 5/16"-18 UNC thread cutting screw features a 1-1/4" length with fully threaded design and blunt tip configuration. Manufactured to precise dimensional standards with Class 2A thread tolerance for consistent performance. The product complies with ASME B18.6.3 specifications (SAE J933) and is RoHS 3 (2015/863/EU) Compliant, ensuring environmental regulatory adherence. Designed for use with K drill bit size (0.281" diameter) for optimal hole preparation in various metal substrates.

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