Aircraft Type A Tapping Screws - THA & THASS Series
Cadmium Plated & Stainless Steel Self-Tapping Screws | EU Stock
Your European Source for Aircraft Tapping Screws
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Airpart Supply stocks a comprehensive range of Type A tapping screws in our Dublin warehouse, providing fast delivery across the European Union for maintenance organisations and aircraft operators requiring self-tapping sheet metal fasteners. Type A tapping screws, also known as sheet metal screws, are essential aircraft hardware components designed for fastening thin sheet metal, resin-impregnated plywood, and various composite materials. These self-tapping fasteners feature a gimlet point and coarse thread that cuts its own mating thread during installation, eliminating the need for pre-tapped holes or rivnuts. Our range includes THA series (cadmium plated steel) and THASS series (stainless steel) in round head configuration. These screws are used extensively throughout general aviation aircraft including Cessna, Piper, and Beechcraft aircraft for access panels, fairings, inspection covers, and interior trim. Available in sizes 4 through 10 with lengths from 1/4" to 1". All parts ship from our EU warehouse with full traceability documentation, eliminating customs delays and simplifying VAT for European customers. |
Type A Tapping Screw Reference
Understanding Type A Tapping Screw Specifications
Selecting the correct tapping screw requires understanding these key specifications:
Screw SizeDiameter designation (4, 6, 8, or 10). Larger numbers indicate greater shank diameter. |
LengthMeasured from under the head to the screw point. Select based on material stack-up. |
Head StyleRound head (RX) provides bearing surface and is visible when installed. |
Point TypeType A features gimlet point for piercing and thread-forming in thin materials. |
THA - Cadmium PlatedSteel substrate with cadmium plating for corrosion protection. Standard finish. |
THASS - Stainless SteelCorrosion-resistant stainless steel for marine and high-moisture environments. |
Thread PitchCoarse thread spacing optimised for sheet metal and thin materials. |
Pilot HoleRecommended pilot hole ensures proper thread engagement and prevents splitting. |
THA Series - Cadmium Plated Steel
Round Head Type A - Cadmium Plated (THA)
| Size | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" | 1" |
|---|---|---|---|---|---|---|
| Size 4 | 4RX1/4THA | 4RX3/8THA | 4RX1/2THA | — | — | — |
| Size 6 | 6RX1/4THA | 6RX3/8THA | 6RX1/2THA | 6RX5/8THA | 6RX3/4THA | — |
| Size 8 | — | 8RX3/8THA | 8RX1/2THA | 8RX5/8THA | 8RX3/4THA | 8RX1THA |
| Size 10 | — | 10RX3/8THA | 10RX1/2THA | 10RX5/8THA | 10RX3/4THA | 10RX1THA |
THASS Series - Stainless Steel
Round Head Type A - Stainless Steel (THASS)
| Size | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" | 1" |
|---|---|---|---|---|---|---|
| Size 4 | 4RX1/4THASS | 4RX3/8THASS | 4RX1/2THASS | — | — | — |
| Size 6 | 6RX1/4THASS | 6RX3/8THASS | 6RX1/2THASS | 6RX5/8THASS | 6RX3/4THASS | — |
| Size 8 | — | 8RX3/8THASS | 8RX1/2THASS | 8RX5/8THASS | 8RX3/4THASS | 8RX1THASS |
| Size 10 | — | 10RX3/8THASS | 10RX1/2THASS | 10RX5/8THASS | 10RX3/4THASS | 10RX1THASS |
Related Aircraft Hardware
Type B Tapping ScrewsTHB & THBSS SeriesType B tapping screws with blunt point for heavier gauge materials. View Type B Screws |
Aircraft RivnutsNAS1329 & NAS1330 SeriesBlind threaded inserts for permanent anchor points in sheet metal. View Rivnuts |
AN3 BoltsAircraft Standard BoltsAN specification aircraft bolts for structural applications. View AN3 Bolts |
Screw KitsAircraft Screw AssortmentsComprehensive screw kits for aircraft maintenance and repairs. View Screw Kits |
Aircraft ToolingInstallation ToolsScrewdrivers, drivers, and tooling for professional aircraft maintenance. View Tooling |
AN960 WashersLight & Regular SeriesAircraft flat washers for use with tapping screws and bolts. View Washers |
Why Choose Airpart Supply for Aircraft Hardware?
EU Warehouse StockTHA and THASS tapping screws stocked in Dublin for fast delivery across Europe. |
Quality AssuredAll tapping screws supplied with full traceability and certification. |
Technical SupportExpert team to assist with size selection and material recommendations. |
Competitive PricingTrade accounts available with volume discounts for maintenance organisations. |
VAT SimplifiedEU VAT registration simplifies purchasing for European aviation businesses. |
Complete RangeFull selection of aircraft hardware from screws to bolts, rivnuts, and fasteners. |
Browse Our Complete Hardware Range
Visit our main Aircraft Hardware section for the complete range of aviation fasteners, tapping screws, bolts, nuts, and specialty hardware.
View All HardwareNeed Help Selecting the Right Tapping Screws?
Our technical team is ready to assist with size selection, material recommendations, and bulk order enquiries.
Contact us: [email protected] | +353 1 697 0917
