S-90054A291 Length 1/2" Tapping Screws

Tapping Screws

0442FA00027 Tapping Screws
0442FA00027 Tapping Screws

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

Part No.
Part No. 0442FA00027
Equivalent to mcmaster :
90054A291

Basic Information

Tapping Screw Type A/AB
Screw Features Flanged
System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 0.313"
Head Height 0.194"

Dimensions

Length 1/2"
Flange Diameter 0.432"
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 External Hex/Slotted
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, ensuring long-lasting performance in industrial environments.
  • Enhanced fastening efficiency through thread forming technology, creating strong, vibration-resistant threads in sheet metal without pre-tapping.
  • Secure and stable installation with the flanged design, providing a larger bearing surface to prevent pull-through and distribute load evenly.
  • Quick and precise driving using the external hex/slotted drive, allowing for high-torque application and compatibility with common tools.
  • Optimized for thin materials with a pointed tip and fully threaded shank, enabling easy penetration and maximum thread engagement in sheet metal up to 0.025" thickness.
  • Reliable dimensional accuracy with No. 12 size, 1/2" length, and 11 threads per inch, ensuring consistent fit and performance in repetitive applications.
  • Compliance with environmental standards including RoHS 3 and REACH, making them safe for use in regulated industries and global supply chains.

Professional Applications & Engineering Value

These No. 12 zinc-plated steel tapping screws are engineered to address common challenges in sheet metal fabrication, such as material fatigue and loosening under vibration. The thread forming design cold-forms threads into the base material, eliminating the need for tapped holes and reducing assembly time while providing exceptional resistance to back-out. Made from durable zinc-plated steel, they offer reliable corrosion protection in harsh conditions. The flanged head enhances clamping force and eliminates the need for separate washers, streamlining installation in HVAC, automotive, and electronics enclosures. With a pointed tip and fully threaded body, they ensure quick starts and maximum holding power in thin-gauge metals, making them ideal for high-volume production lines where speed and reliability are critical.

Specification Summary & Compliance

These screws feature a No. 12 size with 0.216" thread diameter and 11 threads per inch, adhering to standard inch measurements for precise fit. The external hex/slotted drive and A/AB tapping screw type ensure compatibility with industry tools and practices. Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, they are free from hazardous substances, supporting sustainable and safe industrial applications. The fully threaded design and right-hand thread direction provide consistent performance in automated and manual fastening processes.

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