S-90485A370 Length 3/4" Tapping Screws

Tapping Screws

0508FA00025 Tapping Screws
0508FA00025 Tapping Screws

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

Part No.
Part No. 0508FA00025
Equivalent to mcmaster :
90485A370

Basic Information

Tapping Screw Type TRS
System of Measurement Inch

Head Parameters

Head Type Flat
Head Diameter 0.477"
Head Height 0.153"
Flat Head Profile Standard

Dimensions

Length 3/4"
Shank Cross Section Tri-Lobe

Thread Parameters

Screw Size 1/4"
Thread Diameter 0.25"
Approximate Threads per Inch 10
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Blunt
Drive Style Phillips
Drive Size No. 3
Drill Bit Size 5.5 mm
Drill Bit Diameter 0.2165"
Countersink Angle 82°
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 holding power in plastic materials thanks to the tri-lobe shank design that displaces material to create secure, vibration-resistant threads
  • Excellent corrosion resistance provided by 18-8 stainless steel construction, ensuring long-term reliability in various industrial environments
  • Efficient installation with reduced driving torque through the thread forming (TRS) design that eliminates chip formation and thread stripping
  • Secure flush mounting achieved with the standard flat head profile and 82° countersink angle for clean, professional finishes
  • Reliable drive engagement with Phillips #3 drive style that accommodates standard industrial tools
  • Full-length threading for maximum grip along the entire 3/4" length, providing consistent holding strength
  • Environmental compliance assurance with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

These 1/4" TRS tapping screws are specifically engineered to address common challenges in plastic fastening applications where traditional threaded fasteners often fail. The tri-lobe shank cross-section and thread forming design create permanent, high-strength threads in plastic materials without generating chips or causing material stress cracking. The 18-8 stainless steel construction provides essential corrosion resistance for demanding industrial environments, while the flat head with 82° countersink angle ensures flush mounting that prevents snagging and maintains aesthetic integrity. These thread forming screws deliver exceptional vibration resistance and pull-out strength, making them ideal for plastic assembly in automotive, electronics, and consumer goods manufacturing where reliability is critical.

Specification Summary & Compliance

These tapping screws feature precise dimensional specifications including 1/4" thread diameter, 10 threads per inch, and 3/4" fully threaded length. The TRS (Thread Rolling Screw) design follows industry-standard thread forming principles for plastic applications. Manufacturing and material compliance includes RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant status, ensuring environmental safety and regulatory adherence for industrial use across global markets.

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