S-90395A294 Length 3/4" Tapping Screws

Tapping Screws

0409FA00020 Tapping Screws
0409FA00020 Tapping Screws

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

Part No.
Part No. 0409FA00020
Equivalent to mcmaster :
90395A294

Basic Information

Tapping Screw Type A/AB
System of Measurement Inch

Head Parameters

Head Type Rounded
Head Diameter 0.425"
Head Height 0.153"
Rounded Head Profile Standard
Rounded Head Style Pan

Dimensions

Length 3/4"
Shank Cross Section Round

Thread Parameters

Screw Size No. 12
Thread Diameter 0.216"
Approximate Threads per Inch 11
Thread Direction Right Hand
Threading Fully Threaded

Tip & Drive Parameters

Tip Type Pointed
Drive Style Square
Drive Size No. 3
Drill Bit Size 3/16"
Drill Bit Diameter 0.1875"
Tapping Method Thread Forming

Material & Strength

Material Zinc-Plated Steel

Temperature & Environment

For Use In Sheet Metal
REACH Compliant
RoHS Compliant

Installation & Application

Maximum Drilling Thickness 0.025"
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 zinc-plated steel construction for extended service life in demanding industrial environments
  • Exceptional thread-forming capability with A/AB type design creates permanent, vibration-resistant threads in sheet metal without pre-tapping
  • Optimized for 0.1875" drill holes ensuring precise fit and maximum material engagement in sheet metal applications up to 0.025" thickness
  • Enhanced driving efficiency with square drive (No. 3) and pan head design prevents cam-out and provides secure tool engagement
  • Full threading along 3/4" length delivers consistent holding power throughout the entire fastener engagement
  • Right-hand thread direction with 11 threads per inch provides reliable, standardized fastening performance
  • Comprehensive regulatory compliance meeting RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

These No. 12 thread forming tapping screws are engineered specifically for sheet metal applications where reliable fastening is critical. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for metal-to-metal connections. The A/AB thread forming technology eliminates the need for pre-tapped holes, reducing installation time and labor costs while creating durable, vibration-resistant threads that won't loosen under stress. The pan head design with square drive ensures positive tool engagement, preventing stripping during high-torque installation. These industrial screws are particularly valuable in metal fabrication, HVAC systems, electrical enclosures, and construction applications where sheet metal fasteners must maintain integrity despite thermal cycling and mechanical loads.

Specification Summary & Compliance

These tapping screws feature precise No. 12 thread diameter (0.216") with 11 threads per inch and 3/4" length with full threading. The thread forming A/AB type complies with industry standards for self-tapping fasteners in sheet metal. Manufacturing specifications include Class 2A thread tolerance for consistent performance. Regulatory compliance is confirmed with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring environmental safety and industrial suitability.

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