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OSG Threading Tap NPT A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes DIN5156 - 1/2 x 14
| Size | 1/2 |
| Pitch | 14 |
| Overall Length | 125 |
| Threading Length | 35 |
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Description
The OSG Threading Tap NPT A-Spiral Flute – Powder Metal, TiCN Coated, Right Hand – Blind Holes (DIN5156) is a purpose-built tool for precision National Pipe Taper threads in tight blind-hole spaces. Designed for machinists who demand consistent, leak-tight fittings, it combines advanced materials with smart geometry for reliable performance.
- Thread type: NPT (National Pipe Taper) threads for accurate, repeatable right-hand tapping in blind holes.
- A-Spiral flute: Specialized spiral flute geometry for efficient chip evacuation and reduced clogging in deep or restricted cavities.
- Material: Powder-metal body delivers enhanced toughness, wear resistance, and durability under demanding cutting conditions.
- Coating: TiCN coating lowers friction and improves heat resistance to support higher cutting speeds and longer tool life.
- Size: 1/2" nominal size with 14 threads per inch (1/2 x 14), suitable for standard NPT applications.
- Standards: DIN5156 compatibility ensures reliable hole threading performance within specified tolerances.
- Application: Optimized for blind-hole tapping across a range of materials used in piping components and fluid systems.
In practical use, this tap provides clean, accurate threads in constrained spaces, reducing rework and ensuring dependable seals for pneumatic and hydraulic assemblies. The combination of powder-metal construction and TiCN coating supports longer tool life and steadier performance, even when threading tougher materials. Ideal for maintenance, fabrication, or production environments where durable NPT taps in blind-hole applications are essential for fast, consistent results.
Part Numbers
- Protool Part Number
- OSG-48331900
- 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 NPT A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes
View full collection →You are viewing OSG-48331900. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Shank Diameter | Flutes | DIN | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| OSG-48331500 | 1/16 | 27 | 90 | 6 | 3 | 5156 | £129.17 | 1-2 days | |
| OSG-48331600 | 1/8 | 27 | 90 | 7 | 3 | 5156 | £103.37 | In Stock | |
| OSG-48331700 | 1/4 | 18 | 100 | 11 | 3 | 5156 | £124.30 | In Stock | |
| OSG-48331800 | 3/8 | 18 | 110 | 12 | 4 | 5156 | £170.44 | 1-2 days | |
| OSG-48331900 Viewing | 1/2 | 14 | 125 | 16 | 4 | 5156 | £212.81 | In Stock | |
| OSG-48331000 | 3/4 | 14 | 140 | 20 | 4 | 5156 | £337.00 | 1-2 days | |
| OSG-48331100 | 1 | 11.5 | 160 | 25 | 4 | 5156 | £478.28 | 1-2 days |
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