Carmex Internal/External Whitworth Threadmill Insert 21mm / 11 TPI / 21 - 11 W MT7

Mill-Thread Insert – BSPT 11 TPI, Internal / External

The Carmex 21-11 BSPT MT7 is a precision thread milling insert for producing BSPT (British Standard Pipe Taper) threads with 11 TPI. Designed for both internal and external applications, it provides accurate and leak-tight tapered pipe threads used in hydraulic, pneumatic, and pressure fitting systems.

Manufactured from MT7 ultra-fine carbide, the insert offers excellent hardness, wear resistance, and thermal stability for long-lasting performance and consistent cutting accuracy. Its size 21 profile ensures superior rigidity and vibration-free operation when machining medium to large pipe diameters on CNC milling machines.

Fully compatible with Carmex SR Series toolholders (single, twin, or multi-insert types), it guarantees secure clamping, reliable chip control, and high-quality thread finish in tapered pipe thread milling operations.

Key Features & Benefits

• Ordering Code: 21-11 BSPT MT7
• Thread Type: Internal / External
• Thread Profile: BSPT – British Standard Pipe Taper (55°)
• TPI: 11
• Insert Size: 21
• H (Height): 12 mm
• T (Thickness): 4.7 mm
• Carbide Grade: MT7
• Cutting Edge: Single
• Applications: Internal and external BSPT tapered thread milling for hydraulic, pneumatic, and pipe fitting systems
• Compatible Toolholders: SR Series (Single, Twin, Multi-Insert)

Carmex Precision Tools Ltd. is a world-renowned manufacturer of high-performance threading solutions, offering Thread Turning Inserts, Mill-Thread Inserts, Solid Carbide Threadmills, and SR Series Toolholders designed for accuracy, durability, and productivity in industrial applications.