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ITP Straight Styli - Type T - Ruby Ball - Without Thread x 15.4mm Overall Length - KTM500401015
| Styli Type | Type T |
| Thread Size | Without |
| Ball Diameter (DK) | 0.4 |
| Overall Length (L) | 15.4 |
| Shank Diameter (DG) | N/A |
| Measuring Length (ML) | 2.5 |
Learn more about Klarna
ITP Straight Styli – Type T, Ruby Ball, is a compact, non-threaded probing stylus designed for precision measurement, delicate contact tasks, and clamp-mounted setups. Its ruby ball tip provides accurate, low-wear contact in tight spaces while the tungsten carbide stem offers exceptional durability.
- Design: Straight stylus without thread for easy integration with compatible clamp holders
- Tip Options: Ruby ball tips available from Ø0.2 mm to Ø5.0 mm for tailored contact precision
- Material: Tungsten carbide stem delivers stiffness and wear resistance in demanding environments
- Stem Configuration: Single- or multi-stepped stem to suit different probing profiles
- Length: Overall length of 15.4 mm for compact reach in tight fixtures
- Part Number: KTM500401015
- Custom Sizes: Other ruby ball diameters can be requested via configurator or by email
In practical use, the non-threaded design reduces snag risk when positioning the stylus in intricate fixtures, while the tungsten carbide shaft stands up to repeated contact in metrology, electronics, and micro-assembly tasks. The ruby ball tip minimizes wear on both the stylus and the workpiece, delivering consistent, repeatable measurements. For specialized applications, choose a different ball diameter to balance contact area and tactile feedback, and pair the stylus with a compatible clamp holder to ensure stable, repeatable probing results.
| Styli Type | Type T |
| Thread Size | Without |
| Ball Diameter (DK) | 0.4 |
| Overall Length (L) | 15.4 |
| Shank Diameter (DG) | N/A |
| Measuring Length (ML) | 2.5 |
| Neck Diameter (DS) | 1 |
| Stem Material | carbide |
| Base Material | N/A |
| Prob Ball Material | ruby |
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.


