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OSG Threading Tap - UNC Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 1/2 x 13
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Description
The OSG UNC Spiral Flute Threading Tap is designed for precision internal threading in blind holes, delivering clean, accurate threads in demanding metalworking tasks. Built with cobalt-enhanced HSS and a durable steam oxide coating, it stands up to heat and wear in tough materials.
- Size and Thread: 1/2" diameter with 13 UNC coarse thread for standard internal threads
- Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and wear resistance
- Coating: Steam oxide coating to improve heat resistance and corrosion protection
- Flute Design: Spiral flute for efficient chip evacuation in blind-hole applications
- Application: Specifically optimized for tapping internal threads in blind holes
- Technology: Leverages OSG’s advanced threading techniques for consistent, high-quality results
With the combination of a spiral flute, robust HSS-E construction, and a protective steam oxide coating, this tap delivers reliable performance across challenging metals and tight cavities. Expect smooth chip removal, reduced risk of thread damage, and longer tool life in high-production or precision-tuning environments, making it a dependable choice for accurate, repeatable internal threads.
Part Numbers
- Protool Part Number
- OSG-22204894
- 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-22204894. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22204534 | No. 2 | 56 | 9.5 | 2.8 | 44.5 | £64.30 | In Stock | |
| OSG-22204554 | No. 3 | 48 | 9.5 | 2.8 | 44.5 | £64.30 | In Stock | |
| OSG-22204574 | No. 4 | 40 | 11 | 3.15 | 48 | £39.97 | In Stock | |
| OSG-22204594 | No. 5 | 40 | 11 | 3.15 | 48 | £39.97 | 1-2 days | |
| OSG-22204614 | No. 6 | 32 | 13 | 3.55 | 50 | £24.13 | In Stock | |
| OSG-22204644 | No. 8 | 32 | 13 | 4.5 | 53 | £24.13 | In Stock | |
| OSG-22204664 | No. 10 | 24 | 16 | 5 | 58 | £24.13 | In Stock | |
| OSG-22204684 | No. 12 | 24 | 17 | 5.6 | 62 | £29.55 | 1-2 days | |
| OSG-22204714 | 1/4 | 20 | 19 | 6.3 | 66 | £20.00 | In Stock | |
| OSG-22204744 | 5/16 | 18 | 22 | 8 | 72 | £23.19 | In Stock | |
| OSG-22204794 | 3/8 | 16 | 24 | 10 | 80 | £29.55 | In Stock | |
| OSG-22204844 | 7/16 | 14 | 25 | 8 | 85 | £41.11 | In Stock | |
| OSG-22204894 Viewing | 1/2 | 13 | 29 | 9 | 89 | £41.63 | In Stock | |
| OSG-22204944 | 9/16 | 12 | 30 | 11.2 | 95 | £53.03 | In Stock | |
| OSG-22205014 | 5/8 | 11 | 32 | 12.5 | 102 | £61.69 | In Stock | |
| OSG-22205154 | 3/4 | 10 | 37 | 14 | 112 | £92.73 | In Stock | |
| OSG-22205264 | 7/8 | 9 | 38 | 16 | 118 | £128.64 | In Stock | |
| OSG-22205384 | 1 | 8 | 45 | 18 | 130 | £154.71 | In Stock | |
| OSG-22205514 | 1.1/8 | 7 | 48 | 20 | 138 | £265.95 | 1-2 days | |
| OSG-22205644 | 1.1/4 | 7 | 51 | 22.4 | 151 | £338.98 | In Stock |
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