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OSG Threading Tap - BSW Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 5/16 x 18
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Description
The OSG BSW Spiral Flute Threading Tap in HSS-E with Steam Oxide coating is a precision tool designed for professionals who need reliable blind-hole threading. Built for durability and accuracy, it delivers consistent internal threads in metal parts with demanding tolerances.
- Size & Thread: 5/16" diameter, 18 threads per inch (BSW) for standard blind-hole threading.
- Material: HSS-E (high-speed steel with cobalt) for enhanced wear resistance and heat tolerance.
- Coating: Steam oxide coating to improve durability and reduce corrosion under cutting conditions.
- Flute Design: Spiral flutes optimize chip evacuation, helping maintain cutting efficiency in blind holes.
- Precision & Durability: Leveraging OSG’s advanced threading technology to produce high-quality, accurate threads with extended tool life.
When used in metalworking, this tap promotes clean, reproducible internal threads in blind-hole applications, reducing rework and downtime. The combination of HSS-E chemistry and steam-oxide coating withstands the heat and wear typical of tapping operations, while the spiral flute design minimizes chip clogging for smoother, more reliable performance. Ideal for repair work or production tasks where precise internal threads are critical, this tap helps machinists achieve repeatable results and longer tooling life.
Part Numbers
- Protool Part Number
- OSG-22207074
- 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 - BSW Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole
View full collection →You are viewing OSG-22207074. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22207024 | 1/8 | 40 | 11 | 3.15 | 48 | £46.05 | 1-2 days | |
| OSG-22207034 | 5/32 | 32 | 13 | 4 | 53 | £55.62 | 1-2 days | |
| OSG-22207044 | 3/16 | 24 | 16 | 5 | 58 | £27.80 | In Stock | |
| OSG-22207054 | 7/32 | 24 | 17 | 5.6 | 62 | £38.67 | 1-2 days | |
| OSG-22207064 | 1/4 | 20 | 19 | 6.3 | 66 | £24.23 | In Stock | |
| OSG-22207544 | 9/32 | 20 | 22 | 8 | 72 | £53.01 | 1-2 days | |
| OSG-22207074 Viewing | 5/16 | 18 | 24 | 10 | 80 | £26.94 | In Stock | |
| OSG-22207084 | 3/8 | 16 | 25 | 8 | 85 | £33.18 | In Stock | |
| OSG-22207094 | 7/16 | 14 | 29 | 9 | 89 | £46.91 | In Stock | |
| OSG-22207104 | 1/2 | 12 | 30 | 11.2 | 95 | £47.36 | In Stock | |
| OSG-22207114 | 9/16 | 12 | 32 | 12.5 | 102 | £62.59 | 1-2 days | |
| OSG-22207124 | 5/8 | 11 | 37 | 14 | 112 | £71.26 | In Stock | |
| OSG-22207134 | 3/4 | 10 | 37 | 14 | 112 | £106.89 | In Stock | |
| OSG-22207144 | 7/8 | 9 | 38 | 16 | 118 | £147.77 | In Stock | |
| OSG-22207154 | 1 | 8 | 45 | 18 | 130 | £175.57 | 1-2 days | |
| OSG-22207164 | 1.1/8 | 7 | 37 | 20 | 127 | £305.92 | 1-2 days | |
| OSG-22207174 | 1.1/4 | 7 | 37 | 22 | 137 | £389.36 | In Stock |
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