Features
- Product Type: Premium 55° Partial Profile laydown threading inserts (Whitworth/BSP).
- Universal Efficiency: The versatile 16er ag55 threading insert covers a wide pitch range of 48 – 8 TPI (0.5 – 3.0mm) in a single tool.
- Machine Compatibility: High-performance threading inserts for lathe operations, suitable for steel, stainless steel, and cast iron.
- Size Options: Stocked in all standard sizes, including the popular 16er threading inserts (3/8″ I.C.) and micro-boring sizes.
- Directional Flexibility: Available in standard right-hand and left hand thread insert (EL/IL) models for comprehensive CNC machining.
Contact our sales team to discover all of your pricing options.
Product Overview
Maximize your workshop’s efficiency with our 55° Partial Profile laydown threading inserts. Specifically engineered for 55° British Standard threads (such as BSW, BSF, and BSP/G), these tools feature a non-topping geometry.
Unlike full profile tools, these threading inserts for lathe applications cut the thread groove without modifying the major or minor diameter. This design allows a single insert grade to machine multiple pitches, significantly optimizing your tool inventory.
Key Features & Benefits
- The “Universal” 55° Solution: Our 16er ag55 threading insert is the industry standard for versatility, capable of machining pitches from 0.5mm to 3.0mm (48-8 TPI) without a tool change.
- Broad Inventory: We supply a complete range of threading inserts, from small 5/32″ I.C. inserts for internal boring up to heavy-duty 5/8″ I.C. tools.
- Reverse Machining: To meet all turning requirements, we offer specific left hand thread insert options (such as 16EL AG55) alongside standard right-hand tools.
- Standard Compatibility: fully compatible with standard 16er threading inserts tool holders and boring bars.
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Contact our sales team to discover all of your pricing options

