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OSG Threading Tap - BSF Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 5/16 x 22
| Form | BSF |
| Size | 5/16 |
| Pitch | 22 |
| Flute Length | 22 |
| Shank Diameter | 8 |
| Overall Length | 72 |
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Achieve precise, durable BSF threads in blind holes with the OSG BSF Spiral Flute Threading Tap. Built for professional workshops and demanding machining tasks, it delivers high-quality threads and extended tool life.
- Thread size and type: 5/16-22 BSF (British Standard Fine) threading tap optimized for blind-hole applications
- Material: HSS‑E (high-speed steel with cobalt) for enhanced hardness and heat resistance
- Coating: Steam Oxide finish to improve wear resistance and corrosion protection
- Flute design: Spiral flute geometry for efficient chip evacuation in confined blind holes
- Intended use: Specifically crafted for reliable tapping in blind-hole metal components
- Manufacturer technology: Leverages OSG’s advanced threading methods to deliver consistent thread quality and longer tool life
This tapping solution reduces heat buildup and material buildup during cutting, helping you achieve clean, accurate threads with fewer reworks. The cobalt-infused HSS keeps its edge through high-speed tapping, while the steam oxide coating adds longevity in tough environments. The spiral flute design minimizes chip packing in blind holes, enabling deeper tapping and smoother operation across a range of metals. Ideal for aerospace, automotive, and general precision machining where precise British-standard threads are required.
| Form | BSF |
| Size | 5/16 |
| Pitch | 22 |
| Flute Length | 22 |
| Shank Diameter | 8 |
| Overall Length | 72 |
| Substrate | HSS-E |
| Style | Spiral Flute |
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 - BSF Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole
View full collection →You are viewing OSG-22207324. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22207554 | 3/16 | 32 | 16 | 5 | 58 | £27.80 | In Stock | |
| OSG-22207564 | 7/32 | 28 | 17 | 5.6 | 62 | £39.10 | 1-2 days | |
| OSG-22207314 | 1/4 | 26 | 19 | 6.3 | 66 | £23.75 | In Stock | |
| OSG-22207324 Viewing | 5/16 | 22 | 22 | 8 | 72 | £26.94 | In Stock | |
| OSG-22207334 | 3/8 | 20 | 24 | 10 | 80 | £33.18 | In Stock | |
| OSG-22207344 | 7/16 | 18 | 25 | 8 | 85 | £46.91 | In Stock | |
| OSG-22207354 | 1/2 | 16 | 29 | 9 | 89 | £47.36 | In Stock | |
| OSG-22207364 | 9/16 | 16 | 30 | 11.2 | 95 | £62.59 | 1-2 days | |
| OSG-22207374 | 5/8 | 14 | 32 | 12.5 | 102 | £71.26 | In Stock | |
| OSG-22207394 | 3/4 | 12 | 37 | 14 | 112 | £106.89 | In Stock | |
| OSG-22207414 | 7/8 | 11 | 38 | 16 | 118 | £147.77 | 1-2 days | |
| OSG-22207424 | 1 | 10 | 45 | 18 | 130 | £175.57 | 1-2 days | |
| OSG-22207434 | 1.1/8 | 9 | 37 | 20 | 127 | £305.92 | 1-2 days | |
| OSG-22207444 | 1.1/4 | 9 | 37 | 22 | 137 | £389.36 | 1-2 days |
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