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Carmex Small Indexabe Carbide Threading Insert - Unified Full Profile - T8 - 8.3mm Min Bore - 28 TPI Pitch
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The Carmex Small Indexable Carbide Threading Insert delivers precise internal-threading for engineers and machinists working with challenging materials. Designed for ISO and UN profiles, this compact insert enables dependable internal thread milling in a single, repeatable setup.
- Insert type: Indexable carbide threading insert with Unified Full Profile for internal threads.
- Profile support: Works with ISO and UN internal-thread profiles.
- Pitch and size: 28 TPI pitch; T8 insert size.
- Minimum bore: 8.3 mm minimum bore diameter.
- Coating and grade: BLU PVD triple-layer coated sub-micron carbide grade.
- Materials compatibility: Suitable for stainless steels, cast iron, titanium, non-ferrous metals, and most high-temperature alloys (M10–M20, K05–K20, N10–N20, S10–S20).
- Application: Ideal for precision internal-threading operations in a single insert without retooling.
With its hard-wearing carbide core and blue BLU PVD coating, this insert maintains cutting-edge performance across tough metals, delivering consistent thread form and surface finish. The unified full-profile geometry supports clean chip control and reliable thread engagement in bore diameters at or above 8.3 mm, while its indexable design reduces downtime by allowing quick insert changes without removing the entire tool. Built for demanding jobs—from stainless steels to high-temperature alloys—this insert helps you achieve accurate threads, tighter tolerances, and smoother production cycles.
| Insert Size | T8 |
| Pitch | 28 |
| Minimum Bore | 8.3 |
| F | 4 |
| Y | 0.7 |
| UNC | 3/8 |
| UNF | N/A |
| UNEF | N/A |
| UNS | 7/16 |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Carmex Small Indexable Carbide Insert Full Profile Insert UN
View full collection →You are viewing T8I28UNBLU. Click any other SKU to view its full details.
| Product SKU | Insert Size | Pitch | Minimum Bore | F | Y | UNC | UNF | UNEF | UNS | 1/2 | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T8I32UNBLU | T8 | 32 | 8.3 | 4 | 0.6 | 7/16 | 1/2 | N/A | N/A | 3/8 | £17.32 | 5 days | |
| T8I28UNBLU Viewing | T8 | 28 | 8.3 | 4 | 0.7 | 3/8 | N/A | N/A | 7/16 | 1/2 | £17.32 | 5 days | |
| T8I24UNBLU | T8 | 24 | 8.3 | 4 | 0.7 | N/A | N/A | 3/8 | N/A | £16.40 | 5 days | ||
| T8I20UNBLU | T8 | 20 | 8.2 | 3.9 | 0.9 | 3/8 | N/A | 7/16 | 1/2 | N/A | £16.40 | In Stock | |
| T8I16UNBLU | T8 | 16 | 8.7 | 4.4 | 1 | 7/16 | 1/2 | N/A | N/A | N/A | £16.40 | 5 days | |
| T8I14UNBLU | T8 | 14 | 8.8 | 4.5 | 1.2 | N/A | 7/16 | N/A | N/A | £16.40 | 5 days | ||
| T8I13UNBLU | T8 | 13 | 8.8 | 4.5 | 1.3 | 1/2 | N/A | N/A | N/A | £16.70 | 5 days | ||
| T10I20UNBLU | T10 | 20 | 12.0 | 6.8 | 0.9 | 9/16 | 5/8 | 11/16 | N/A | N/A | £16.40 | 5 days | |
| T10I18UNBLU | T10 | 18 | 12.0 | 6.8 | 1.0 | N/A | N/A | 9/16 | 5/8 | N/A | £16.40 | 5 days | |
| T10I16UNBLU | T10 | 16 | 12.0 | 6.8 | 1.1 | 9/16 | 5/8 | 11/16 | N/A | 3/4 | £16.40 | 5 days | |
| T10I14UNBLU | T10 | 14 | 12.1 | 6.9 | 1.2 | N/A | N/A | 7/8 | N/A | £16.40 | 5 days | ||
| T10I12UNBLU | T10 | 12 | 12.1 | 6.9 | 1.4 | 5/8 | 11/16 | 3/4 | 9/16 | N/A | £16.40 | 5 days | |
| T10I11UNBLU | T10 | 11 | 12.5 | 7.3 | 1.5 | N/A | 5/8 | N/A | N/A | £16.40 | In Stock | ||
| T10I10UNBLU | T10 | 10 | 12.6 | 7.4 | 1.5 | 3/4 | N/A | N/A | N/A | £16.70 | 5 days |
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