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OSG Threading Tap - UNC Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 3/8 x 16
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Description
The OSG UNC Spiral Flute Threading Tap is a precision tool designed for professionals who need reliable 3/8-16 UNC threads in blind holes. Crafted from HSS-E with a steam oxide coating, it delivers enduring performance in demanding machining tasks.
- Thread Size: 3/8-16 UNC
- Material: HSS-E (high-speed steel with cobalt) for outstanding wear resistance and cutting performance
- Coating: Steam oxide coating to improve heat resistance and extend tool life
- Flute Design: Spiral flutes promote efficient chip evacuation in blind-hole tapping
- Application: Optimized for blind-hole threading in metal components
- Brand technology: Supported by OSG’s advanced threading capabilities for consistent, high-quality threads
With this tap, you gain precise, repeatable threads that resist wear under high cutting temperatures. The spiral-flute geometry reduces chip clogging and binding, improving tapping efficiency in tight spaces. The cobalt-enhanced HSS and steam oxide coating work together to extend tool life, decrease downtime, and deliver dependable performance across automotive, manufacturing, and general machining applications.
Part Numbers
- Protool Part Number
- OSG-23204794
- Brand
- OSG
- Category
- Threading Tap
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.
Full Range: OSG Threading Taps - UNC Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole
View full collection →You are viewing OSG-23204794. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-23204574 | No. 4 | 40 | 11 | 3.15 | 48 | £79.95 | 1-2 days | |
| OSG-23204594 | No. 5 | 40 | 11 | 3.15 | 48 | £79.95 | 1-2 days | |
| OSG-23204614 | No. 6 | 32 | 13 | 3.55 | 50 | £48.33 | In Stock | |
| OSG-23204644 | No. 8 | 32 | 13 | 4.5 | 53 | £48.33 | In Stock | |
| OSG-23204664 | No. 10 | 24 | 16 | 5 | 58 | £48.33 | 1-2 days | |
| OSG-23204714 | 1/4 | 20 | 19 | 6.3 | 66 | £39.97 | In Stock | |
| OSG-23204744 | 5/16 | 18 | 22 | 8 | 72 | £46.41 | 1-2 days | |
| OSG-23204794 Viewing | 3/8 | 16 | 24 | 10 | 80 | £59.10 | In Stock | |
| OSG-23204894 | 1/2 | 13 | 29 | 9 | 89 | £83.26 | In Stock |
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