Internal Tool Single A 5/16X.030/.031X1/2 Deep Groove Tool, Sharp Indexable Insert Built for Long Tool Life, Handy Spare for Milling and Turning, Go-To Pick for Machinists and CNC Shops

Internal Tool Single A 5/16X.030/.031X1/2 Deep Groove Tool
✔️ Single grooving tool, 031 x 1/2, CNC Ready, Clean Finishes

The Internal Tool A 5/16X.030/.031X1/2 Deep Groove Tool is an indexable carbide insert for milling, turning and grooving. It's a daily consumable in production machining. This listing is for one single item.

✅ Brand: Internal Tool
✅ Mfr part number: 121-1040
✅ Product type: Grooving Tool
✅ Pack size: Single, 1 piece
✅ Size: 031 x 1/2

💡 How do I read an insert designation like SDMT1204?

Each letter and number tells you shape, clearance, tolerance and size.

• The first letter gives the insert shape.
• Later digits show size and thickness.
• Check your cutter body for the matching insert code.

Grab the Internal Tool A 5/16X.030/.031X1/2 Deep Groove Tool and get the job done right.