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OSG Threading Tap - UNF Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 3/8 x 24
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Description
The OSG UNF Spiral Flute Threading Tap is a high-precision tool designed for fabricators and machinists who need reliable, accurate threads in blind-hole applications. Built for demanding metalworking tasks, it delivers consistent thread form with extended tool life.
- Thread Size: 3/8-24 UNF (Unified National Fine) for tight, precise engagement in blind holes.
- Material & Coating: HSS‑E (high-speed steel with cobalt) core plated with Steam Oxide for improved wear resistance and heat tolerance.
- Flute Design: Spiral flutes enhance chip evacuation, reducing clogging and heat buildup during deep or confined-hole threading.
- Application: Optimized for blind-hole threading tasks where clean starts and accurate thread form are essential.
- Durability: Coated for longevity in repeated cuts and challenging materials, helping extend tool life in production environments.
This threading tap enables precise, repeatable UNF threads with reliable performance in metalworking applications. The combination of cobalt-enhanced HSS, steam-oxide coating, and a spiral flute design supports efficient chip removal and reduced wear, making it a dependable choice for critical machining tasks, fixtures, and assemblies that require strong, accurate fasteners.
Part Numbers
- Protool Part Number
- OSG-23204814
- 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 - UNF Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole
View full collection →You are viewing OSG-23204814. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-23204674 | No. 10 | 32 | 16 | 5 | 58 | £54.37 | In Stock | |
| OSG-23204724 | 1/4 | 28 | 19 | 6.3 | 66 | £44.97 | In Stock | |
| OSG-23204764 | 5/16 | 24 | 22 | 8 | 72 | £52.21 | In Stock | |
| OSG-23204814 Viewing | 3/8 | 24 | 24 | 10 | 80 | £66.49 | In Stock | |
| OSG-23204814A | 7/16 | 20 | 25 | 8 | 85 | £92.49 | 1-2 days | |
| OSG-T9547058 | 1/2 | 20 | 29 | 9 | 89 | £93.67 | 1-2 days |
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