S-99461A815 Length 1/4" Tapping Screws

Tapping Screws

0503FA00057 Tapping Screws
0503FA00057 Tapping Screws

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

Part No.
Part No. 0503FA00057
Equivalent to mcmaster :
99461A815

Basic Information

Tapping Screw Type TRS
System of Measurement Inch

Head Parameters

Head Type Rounded
Head Diameter 0.193"
Head Height 0.071"
Rounded Head Profile Standard
Rounded Head Style Pan

Dimensions

Length 1/4"
Shank Cross Section Tri-Lobe

Thread Parameters

Screw Size No. 3
Thread Diameter 0.099"
Approximate Threads per Inch 24
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Blunt
Drive Style Phillips
Drive Size No. 1
Drill Bit Size No. 46
Drill Bit Diameter 0.081"
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 industrial environments.
  • Exceptional holding power in plastic materials due to the tri-lobe shank design, which prevents loosening and provides secure, vibration-resistant fastening.
  • Efficient, tool-friendly installation with the Phillips No. 1 drive, reducing assembly time and minimizing driver slippage.
  • Reliable thread forming technology creates strong, permanent threads in plastic without chips, eliminating the need for pre-tapped holes.
  • Durable, rounded pan head design offers a low-profile finish and distributes clamping force evenly, reducing material stress.
  • Full compliance with RoHS 3 and REACH regulations, ensuring safe, environmentally responsible use in global industrial applications.
  • Precise 24 TPI thread pitch and 0.099" diameter delivers consistent, tight-fitting connections for No. 3 screw sizes in plastic assemblies.

Professional Applications & Engineering Value

Engineered for demanding plastic assembly applications, these 18-8 Stainless Steel TRS tapping screws solve common fastening challenges like material cracking and thread stripping. The thread forming action and tri-lobe shank cross-section displace plastic material to create robust, high-retention threads without generating debris, ideal for electronics enclosures, automotive components, and consumer goods. The Phillips pan head design ensures easy access and a flush finish, while the stainless steel material provides excellent resistance to rust and chemicals, extending product life in humid or corrosive settings. This combination of precision threading and durable construction minimizes assembly errors and maintenance needs, delivering reliable performance for industrial manufacturers.

Specification Summary & Compliance

This No. 3 x 1/4" TRS tapping screw features a Class 2A thread fit with a 0.099" thread diameter and 24 TPI for consistent engagement in plastics. Manufactured to standard thread forming (TRS) specifications, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.

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