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Carmex Spiral Mill Threading Insert - Unified - H28I12UNMT7

SKU:H28I12UNMT7

The Carmex Spiral Mill Threading Insert — Unified is a versatile threading and finishing tool designed for a wide range of milling setups. Whether you’re producing small components on compact mac... Read more ↓
P
M
K
N
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ApplicationThreading
Thread FormUN
Internal or ExternalInternal
Insert SizeH28
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£48.93
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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Free delivery over £50 ex VAT
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14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

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Description

The Carmex Spiral Mill Threading Insert — Unified is a versatile threading and finishing tool designed for a wide range of milling setups. Whether you’re producing small components on compact machining centers or tackling demanding, high-power milling in robust machines, this spiral insert system delivers smooth cutting and efficient performance across materials.

Its spiral flute design and a smart clamping method work together to maintain consistent index positioning, delivering reliable thread quality with reduced vibration and chatter. The result is cleaner threads, steadier operations, and less downtime between parts.

  • Smooth, high‑speed cutting: The spiral design enables a smooth cutting action at high feed rates, helping you shorten cycle times without compromising thread accuracy or surface finish.
  • 1–9 inserts with optimized indexability: Spiral fluted toolholders hold multiple inserts in a compact diameter, while the unique clamp ensures quick, repeatable indexing for consistent results across jobs.
  • MT7 Sub‑Micron TiN coating for broad material compatibility: Inserts in MT7 Sub‑Micron Grade with Titanium Nitride multi‑layer coating (ISO K10–K20) provide durable performance and reliable results across a wide range of materials.

This combination of spiral geometry, flexible insert capacity, and durable coating supports faster production, higher-quality finishes, and dependable performance from threading through roughing and finishing operations. If you’re looking for a general‑purpose, all‑material solution that minimizes vibration and maximizes tool life, this Carmex Unified insert is designed to fit the workflow of both small-scale and heavy-duty milling applications.

Part Numbers

Protool Part Number
H28I12UNMT7
Brand
Carmex
Category
Thread Mill
Delivery

Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.

Returns

14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.

Technical Support

Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

Trade Accounts

Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.

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.

Ask our technical team about this tool

Not sure if this is the right tool for your job? Ask us about speeds and feeds, material suitability, holders or alternatives — 30+ years of machining experience on the other end.

Prefer to talk? Call 01732 887334 — Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

Full Range: Carmex Spiral Mill Threading Inserts - Unified

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You are viewing H28I12UNMT7. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
H13I16UNMT7 H1316£36.58 5 days
H13I14UNMT7 H1314£36.58 5 days
H13I12UNMT7 H1312£36.58 5 days
H15I16UNMT7 H1516£36.58 5 days
H15I14UNMT7 H1514£36.58 5 days
H15I12UNMT7 H1512£36.58 5 days
H15I10UNMT7 H1510£36.58 5 days
H17I20UNMT7 H1720£36.58 5 days
H17I16UNMT7 H1716£36.58 5 days
H17I14UNMT7 H1714£36.58 5 days
H17I12UNMT7 H1712£36.58 5 days
H17I9UNMT7 H179£36.58 5 days
H19I12UNMT7 H1912£36.58 5 days
H19I8UNMT7 H198£36.58 5 days
H23I32UNMT7 H2332£46.23 5 days
H23I24UNMT7 H2324£60.18 5 days
H23E20UNMT7 H2320£46.23 5 days
H23I20UNMT7 H2320£60.18 5 days
H23E18UNMT7 H2318£46.23 5 days
H23I18UNMT7 H2318£60.18 5 days
H23E16UNMT7 H2316£46.23 5 days
H23I16UNMT7 H2316£60.18 5 days
H23E14UNMT7 H2314£46.23 5 days
H23I14UNMT7 H2314£60.18 5 days
H23E12UNMT7 H2312£46.23 5 days
H23I12UNMT7 H2312£60.18 5 days
H23E10UNMT7 H2310£46.23 5 days
H23I10UNMT7 H2310£46.23 5 days
H23E8UNMT7 H238£46.23 5 days
H23I8UNMT7 H238£60.18 5 days
H23E7UNMT7 H237£46.23 5 days
H23I7UNMT7 H237£60.18 5 days
H28I12UNMT7 ViewingH2812£48.93 5 days
H28I8UNMT7 H288£48.93 5 days
H28I6UNMT7 H286£48.93 5 days
H32E24UNMT7 H3224£48.93 5 days
H32E20UNMT7 H3220£48.93 5 days
H32I20UNMT7 H3220£63.70 5 days
H32E18UNMT7 H3218£48.93 5 days
H32I18UNMT7 H3218£63.70 5 days
H32E16UNMT7 H3216£48.93 5 days
H32I16UNMT7 H3216£63.70 5 days
H32E12UNMT7 H3212£48.93 5 days
H32I12UNMT7 H3212£63.70 5 days
H32E8UNMT7 H328£48.93 5 days
H32I8UNMT7 H328£63.70 5 days
H32E6UNMT7 H326£48.93 5 days
H32I6UNMT7 H326£63.70 5 days
H32I5UNMT7 H325£48.93 5 days
H40I6UNMT7 H406£54.33 5 days
H40I4.5UNMT7 H404.5£54.33 5 days
H45I16UNMT7 H4516£70.73 5 days
H45I12UNMT7 H4512£70.73 5 days
H45I8UNMT7 H458£70.73 5 days
H45I6UNMT7 H456£70.73 5 days
H45I4.5UNMT7 H454.5£54.33 5 days
H45I4UNMT7 H454£54.33 5 days
H63I16UNMT7 H6316£70.73 5 days
H63I12UNMT7 H6312£70.73 5 days
H63I8UNMT7 H638£70.73 5 days
H63I6UNMT7 H636£70.73 5 days
H63I4UNMT7 H634£54.33 5 days