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OSG Threading Tap - BSPT Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 3/8 x 19
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Description
OSG BSPT Spiral Flute Threading Tap is designed for precision blind-hole threading in metalworking, delivering accurate BSPT threads and long tool life. Built for professional machinists, it combines robust HSS-E cobalt material with a durable steam oxide coating for reliable performance in challenging materials.
- Diameter x Thread: 3/8" nominal diameter with 19 TPI BSPT (British Standard Pipe Taper) threading, optimized for blind-hole applications.
- Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and wear resistance under cutting heat.
- Coating: Steam oxide finish provides corrosion resistance and helps with lubricant retention during cutting.
- Flute Design: Spiral flute geometry facilitates efficient chip evacuation in confined blind holes, reducing clogging and breakage.
- Application: Specifically engineered for blind-hole threading in steel and alloy workpieces where access is limited from one end.
- Compatibility: Designed for use with standard tapping setups that support BSPT threads, ensuring smooth integration into existing workflows.
- Precision & Durability: Ground geometry delivers clean, accurate threads while the coating and material choice extend tool life in demanding environments.
This tapping solution helps you achieve consistent, high-quality BSPT threads in blind holes, with reduced downtime thanks to excellent chip evacuation and wear resistance. The combination of HSS-E cobalt and steam oxide coating supports better heat management and longevity, making it a dependable choice for fittings, hydraulic components, and other precision-threaded assemblies.
Part Numbers
- Protool Part Number
- OSG-22618404
- 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 - BSP Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole
View full collection →You are viewing OSG-22618404. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22418004 | 1/8 | 28 | 15 | 8 | 59 | £29.55 | In Stock | |
| OSG-22418014 | 1/4 | 19 | 19 | 10 | 67 | £44.30 | In Stock | |
| OSG-22418024 | 3/8 | 19 | 21 | 12.5 | 75 | £61.69 | In Stock | |
| OSG-22418034 | 1/2 | 14 | 26 | 16 | 87 | £93.00 | In Stock | |
| OSG-22418044 | 5/8 | 14 | 26 | 18 | 91 | £116.01 | In Stock | |
| OSG-22418054 | 3/4 | 14 | 28 | 20 | 96 | £121.67 | In Stock | |
| OSG-22418074 | 1 | 11 | 33 | 25 | 109 | £217.29 | In Stock | |
| OSG-22618384 | 1/8 | 28 | 15 | 8 | 59 | £84.29 | In Stock | |
| OSG-22618394 | 1/4 | 19 | 19 | 10 | 67 | £107.76 | In Stock | |
| OSG-22618404 Viewing | 3/8 | 19 | 21 | 12.5 | 75 | £130.36 | In Stock | |
| OSG-22618414 | 1/2 | 14 | 26 | 16 | 87 | £159.91 | In Stock | |
| OSG-22618434 | 3/4 | 14 | 28 | 20 | 96 | £238.15 | 1-2 days | |
| OSG-22618454 | 1 | 11 | 33 | 25 | 109 | £319.85 | 1-2 days | |
| OSG-22638764 | 1/8 | 27 | 0.75 | 0.318 | 2.1/8 | £84.29 | In Stock | |
| OSG-22638774 | 1/4 | 18 | 1.1/16 | 0.429 | 2.7/16 | £107.76 | In Stock | |
| OSG-22638784 | 3/8 | 18 | 1.1/16 | 5.542 | 3.3/16 | £130.36 | In Stock | |
| OSG-22638794 | 1/2 | 14 | 1.3/8 | 0.687 | 3.1/8 | £159.91 | In Stock | |
| OSG-22638804 | 3/4 | 14 | 1.3/8 | 0.906 | 3.1/4 | £238.15 | 1-2 days | |
| OSG-22638814 | 1 | 11.5 | 1.3/4 | 1.125 | 3.3/4 | £319.85 | 1-2 days |
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