Aircraft Type B Tapping Screws - THB & THBSS Series
Cadmium Plated & Stainless Steel Self-Tapping Screws for Heavier Gauge Materials | EU Stock
Your European Source for Type B Aircraft Tapping Screws
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Airpart Supply stocks a comprehensive range of Type B tapping screws in our Dublin warehouse, providing fast delivery across the European Union for maintenance organisations and aircraft operators requiring self-tapping fasteners for heavier gauge sheet metal applications. Type B tapping screws are essential aircraft hardware components designed for fastening heavier gauge sheet metal compared to Type A tapping screws. These self-tapping fasteners feature a blunt point with finer thread pitch, requiring a pilot hole for installation and providing stronger thread engagement in thicker materials. Our range includes THB series (cadmium plated steel) and THBSS series (stainless steel) in round head configuration. These screws are used throughout general aviation aircraft including Cessna, Piper, and Beechcraft aircraft for structural panels, access covers, and applications where stronger thread engagement is required. 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 B Tapping Screw Reference
Understanding Type B 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 B features blunt point for heavier gauge materials requiring pilot holes. |
THB - Cadmium PlatedSteel substrate with cadmium plating for corrosion protection. Standard finish. |
THBSS - Stainless SteelCorrosion-resistant stainless steel for marine and high-moisture environments. |
Thread PitchFiner thread spacing than Type A, optimised for heavier gauge materials. |
Pilot HoleRequired pilot hole ensures proper thread engagement in thicker materials. |
Type A vs Type B Tapping Screws - What's the Difference?
Type A (THA/THASS)Point: Gimlet (sharp) point for piercing thin materials Thread: Coarse thread spacing Application: Thin sheet metal, plywood, composites Pilot Hole: Optional for very thin materials |
Type B (THB/THBSS) - Current PagePoint: Blunt point for thicker materials Thread: Finer thread spacing for stronger engagement Application: Heavier gauge sheet metal Pilot Hole: Required for proper installation |
THB Series - Cadmium Plated Steel
Round Head Type B - Cadmium Plated (THB)
| Size | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" | 1" |
|---|---|---|---|---|---|---|
| Size 4 | 4RX1/4THB | 4RX3/8THB | 4RX1/2THB | — | — | — |
| Size 6 | — | 6RX3/8THB | 6RX1/2THB | — | 6RX3/4THB | — |
| Size 8 | — | 8RX3/8THB | 8RX1/2THB | 8RX5/8THB | 8RX3/4THB | — |
| Size 10 | — | — | 10RX1/2THB | 10RX5/8THB | 10RX3/4THB | 10RX1THB |
THBSS Series - Stainless Steel
Round Head Type B - Stainless Steel (THBSS)
| Size | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" | 1" |
|---|---|---|---|---|---|---|
| Size 4 | 4RX1/4THBSS | 4RX3/8THBSS | 4RX1/2THBSS | — | — | — |
| Size 6 | 6RX1/4THBSS | 6RX3/8THBSS | 6RX1/2THBSS | — | 6RX3/4THBSS | — |
| Size 8 | — | 8RX3/8THBSS | 8RX1/2THBSS | 8RX5/8THBSS | 8RX3/4THBSS | — |
| Size 10 | — | 10RX3/8THBSS | 10RX1/2THBSS | 10RX5/8THBSS | 10RX3/4THBSS | 10RX1THBSS |
Related Aircraft Hardware
Type A Tapping ScrewsTHA & THASS SeriesType A tapping screws with gimlet point for thin sheet metal materials. View Type A 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 StockTHB and THBSS 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
