S-99461A450 Length 1/2" Tapping Screws

Tapping Screws

0503FA00039 Tapping Screws
0503FA00039 Tapping Screws

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

Part No.
Part No. 0503FA00039
Equivalent to mcmaster :
99461A450

Basic Information

Tapping Screw Type TRS
System of Measurement Inch

Head Parameters

Head Type Rounded
Head Diameter 0.373"
Head Height 0.133"
Rounded Head Profile Standard
Rounded Head Style Pan

Dimensions

Length 1/2"
Shank Cross Section Tri-Lobe

Thread Parameters

Screw Size No. 10
Thread Diameter 0.19"
Approximate Threads per Inch 14
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Blunt
Drive Style Phillips
Drive Size No. 2
Drill Bit Size No. 21
Drill Bit Diameter 0.159"
Tapping Method Thread Forming

Material & Strength

Material 18-8 Stainless 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

  • Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in various environments without rust or degradation.
  • Efficient thread forming using TRS technology and Tri-Lobe shank design, creating strong, permanent threads in plastic without pre-tapping or chips.
  • Easy installation and reduced tool wear with a Phillips No. 2 drive and blunt tip, allowing for precise, controlled driving and minimizing assembly errors.
  • Excellent holding power from fully threaded design and 14 threads per inch, providing secure fastening in plastic materials to prevent loosening.
  • Wide compatibility with standard No. 21 drill bits (0.159" diameter), streamlining the setup process for common plastic assembly applications.
  • Environmental compliance assurance by meeting RoHS 3 and REACH regulations, supporting sustainable and safe manufacturing practices.
  • Durable pan head design with a rounded profile, offering a low-profile finish and reliable performance under repeated stress.

Professional Applications & Engineering Value

This No. 10 x 1/2" stainless steel tapping screw is engineered to address common challenges in plastic fastening, such as material cracking and weak thread retention. The TRS thread forming method, combined with a Tri-Lobe shank cross-section, displaces plastic material to form robust, load-bearing threads without creating debris, reducing the risk of failure in vibration-prone environments. Made from 18-8 stainless steel, it resists corrosion in humid or chemical exposures, while the Phillips pan head and blunt tip enable quick, accurate installations with standard drivers. Ideal for electronics enclosures, automotive plastic components, and consumer goods, this screw enhances assembly speed and product longevity, making it a cost-effective choice for high-volume plastic applications.

Specification Summary & Compliance

This screw features a No. 10 size with a 1/2" length, right-hand thread direction, and approximately 14 threads per inch for precise engagement. It adheres to standard inch measurements and is designed for use with a No. 21 drill bit (0.159" diameter). Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets stringent environmental and safety standards for industrial use.

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