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OSG Threading Tap UNF A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes DIN2184-1 - M4 x 40
| Size | M4 |
| Pitch | 40 |
| Overall Length | 56 |
| Threading Length | 5.1 |
| Reach | 18 |
| Shank Diameter | 3.5 |
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The OSG Threading Tap UNF A-Spiral Flute is a precision-tuned tapping tool designed for professionals who create UNF threads in blind holes. Built for durability and consistent performance, it helps you achieve clean, accurate threads in tight spaces with fewer reworks.
- Thread type: UNF (Unified National Fine) threading for high-precision, fine-pitch taps in blind-hole applications.
- A-Spiral flute: Optimized spiral flute design that promotes efficient chip evacuation and reduces clogging in deep or blind holes.
- Material: Powder metal body engineered for superior wear resistance and temperature tolerance during high-speed tapping.
- Coating: TiCN (Titanium Carbonitride) coating to increase hardness, lower friction, and extend tool life in demanding cuts.
- Size and length: M4 x 40 profile, providing the right balance of rigidity and reach for small-diameter workpieces.
- Direction: Right-hand threading for standard UNF applications.
- Standards: DIN 2184-1 compatibility, ensuring reliable performance in standardized blind-hole tapping.
This tap excels in automotive, aerospace, and precision manufacturing where reliable UNF threads in blind holes are critical. The combination of a TiCN-coated powder-metal body and an A-Spiral flute reduces tool wear and minimizes chip-related issues, delivering consistent results across multiple parts. Whether you’re building tight-tolerance assemblies or performing high-speed production tapping, this tool helps you achieve accurate threads with fewer insertions and less downtime.
| Size | M4 |
| Pitch | 40 |
| Overall Length | 56 |
| Threading Length | 5.1 |
| Reach | 18 |
| Shank Diameter | 3.5 |
| Square | 2.7 |
| Flutes | 2 |
| DIN | 2184-1 |
| Thread Direction | Right Hand |
| Substrate | Powder Metal |
| Coating | TiCN |
| Style | Spiral Flute |
| Form | UNF |
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 A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes
View full collection →You are viewing OSG-48139458. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Shank Diameter | Flutes | DIN | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| OSG-48139454 | M2 | 56 | 45 | 2.8 | 2 | 2184-1 | £56.71 | In Stock | |
| OSG-48139456 | M3 | 48 | 50 | 2.8 | 2 | 2184-1 | £56.58 | In Stock | |
| OSG-48139458 Viewing | M4 | 40 | 56 | 3.5 | 2 | 2184-1 | £49.67 | In Stock | |
| OSG-48139460 | M5 | 40 | 56 | 3.5 | 2 | 2184-1 | £49.67 | In Stock | |
| OSG-48139462 | M6 | 32 | 56 | 4 | 2 | 2184-1 | £56.91 | In Stock | |
| OSG-48139465 | M8 | 32 | 63 | 4.5 | 2 | 2184-1 | £47.00 | In Stock | |
| OSG-48139467 | M10 | 24 | 70 | 6 | 2 | 2184-1 | £58.98 | In Stock | |
| OSG-48139469 | M12 | 24 | 80 | 6 | 2 | 2184-1 | £52.17 | In Stock | |
| OSG-48139472 | 1/4 | 20 | 80 | 7 | 2 | 2184-1 | £66.48 | In Stock | |
| OSG-48139476 | 5/16 | 18 | 90 | 8 | 3 | 2184-1 | £69.93 | In Stock | |
| OSG-48139481 | 3/8 | 16 | 100 | 10 | 3 | 2184-1 | £71.58 | In Stock | |
| OSG-48139486 | 7/16 | 14 | 100 | 8 | 3 | 2184-1 | £77.16 | In Stock | |
| OSG-48139491 | 1/2 | 13 | 110 | 9 | 3 | 2184-1 | £76.38 | In Stock | |
| OSG-48139496 | 9/16 | 12 | 110 | 11 | 3 | 2184-1 | £88.84 | In Stock | |
| OSG-48139504 | 5/8 | 11 | 110 | 12 | 3 | 2184-1 | £101.31 | In Stock | |
| OSG-48139517 | 3/4 | 10 | 125 | 14 | 4 | 2184-1 | £130.68 | In Stock | |
| OSG-48139528 | 7/8 | 9 | 140 | 18 | 4 | 2184-1 | £160.41 | In Stock | |
| OSG-48139539 | 1 | 8 | 160 | 48 | 4 | 2184-1 | £223.09 | In Stock |
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