S-90417A138 Length 1/2" Tapping Screws

Tapping Screws

0505FA00178 Tapping Screws
0505FA00178 Tapping Screws

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

Part No.
Part No. 0505FA00178
Equivalent to mcmaster :
90417A138

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. 15
Drill Bit Diameter 0.18"
Tapping Method Thread Forming

Material & Strength

Material Black-Oxide 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 plastic retention with Tri-Lobe shank design that creates strong, vibration-resistant threads without chipping or cracking materials
  • Corrosion-resistant Black-Oxide Steel construction ensures long-term reliability in various environmental conditions
  • Optimized thread forming performance with 14 TPI thread pitch providing excellent pull-out strength in plastic applications
  • Easy installation and removal with Phillips No. 2 drive that prevents cam-out while maintaining tool engagement
  • Standard pan head profile offers low-profile fastening with consistent clamping force distribution
  • Precision-engineered dimensions with 0.19" thread diameter and 1/2" length for reliable fit in pre-drilled No. 15 holes
  • Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These TRS thread forming screws are specifically engineered for plastic assembly applications where traditional fastening methods often cause stress cracking or material failure. The Tri-Lobe shank cross-section and thread forming design displace plastic material during installation, creating permanent, high-strength threads without generating chips or debris. This makes them ideal for electronics enclosures, automotive trim components, and consumer product assemblies where material integrity is critical. The Black-Oxide Steel provides essential corrosion protection while the fully threaded design ensures maximum engagement throughout the entire fastener length. With 14 threads per inch and precise dimensional control, these screws deliver consistent clamping force and prevent loosening under vibration, addressing common challenges in plastic fastening systems.

Specification Summary & Compliance

These No. 10 x 1/2" TRS thread forming screws feature inch system measurements with 0.19" thread diameter and 14 TPI thread pitch. The fasteners maintain standard dimensional tolerances for reliable performance in plastic assembly applications. Manufacturing compliance includes full adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring they meet current regulatory requirements for hazardous substance restrictions. The thread forming tapping method and Tri-Lobe shank design follow established engineering specifications for plastic fastening applications.

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