S-95893A321 Length 1/4" Tapping Screws

Tapping Screws

0509FA00079 Tapping Screws
0509FA00079 Tapping Screws

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Part No.
Part No. 0509FA00079
Equivalent to mcmaster :
95893A321

Basic Information

Tapping Screw Type TRS
System of Measurement Inch

Head Parameters

Head Type Flat
Head Diameter 0.312"
Head Height 0.1"
Flat Head Profile Standard

Dimensions

Length 1/4"
Shank Cross Section Tri-Lobe

Thread Parameters

Screw Size No. 8
Thread Diameter 0.164"
Approximate Threads per Inch 16
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Blunt
Drive Style Torx Plus
Drive Size IP15, T15
Drill Bit Size No. 29
Drill Bit Diameter 0.136"
Countersink Angle 82°
Tapping Method Thread Forming

Material & Strength

Material Zinc-Plated Steel

Temperature & Environment

For Use In Plastic
REACH Compliant
RoHS Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Enhanced corrosion resistance with zinc-plated steel construction for reliable performance in demanding environments.
  • Superior torque transfer and reduced tool slippage thanks to the Torx Plus IP15 drive system, ensuring efficient installation.
  • Exceptional holding power in plastic materials achieved through the TRS thread-forming design and Tri-Lobe shank, minimizing stripping and back-out.
  • Streamlined installation process with a standard 82° flat head that sits flush and a blunt tip for easy alignment without pre-drilling in many plastics.
  • Wide industrial compatibility with a No. 8 screw size, 1/4" length, and 16 TPI thread pitch, meeting common assembly requirements.
  • Reliable regulatory compliance adhering to RoHS 3 and REACH standards, ensuring safety and environmental responsibility.
  • Optimized for use with standard tooling, including a No. 29 drill bit (0.136" diameter) for precise hole preparation.

Professional Applications & Engineering Value

This No. 8 zinc-plated steel TRS tapping screw is engineered to solve common fastening challenges in plastic assemblies. The thread-forming Tri-Lobe shank design displaces material to create strong, permanent threads without chips, reducing the risk of failure in vibration-prone applications. The Torx Plus IP15 drive allows for higher torque application compared to traditional drives, minimizing cam-out and tool wear, which is critical for high-volume production lines. The zinc plating provides a protective barrier against corrosion, extending the screw's service life in various industrial settings. Fully threaded and featuring a right-hand direction, it ensures maximum grip and pull-out resistance, making it an ideal industrial fastener for electronics enclosures, automotive components, and consumer products where reliability is paramount.

Specification Summary & Compliance

This screw features a No. 8 thread diameter (0.164") with 16 TPI and is fully threaded for consistent engagement. It has a standard flat head with an 82° countersink angle, 1/4" length, and a Torx Plus IP15 (T15) drive. Manufactured from zinc-plated steel, it is designed as a TRS (Thread Rolling Screw) for use in plastics, compatible with a No. 29 drill bit (0.136" diameter). The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.

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