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OSG Threading Tap NPSF A-Spiral Flute - FORME Powder Metal Right Hand -TiCN Coated - Blind Holes DIN5156 - 3/8 x 18
| Size | 3/8 |
| Pitch | 18 |
| Overall Length | 100 |
| Threading Length | 22 |
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Description
The OSG Threading Tap NPSF A-Spiral Flute is a precision tapping tool designed for engineers and machinists who need reliable NPSF threads in blind-hole applications. Built with FORME powder metal and a TiCN coating, it delivers durable, high-performance threading for hydraulic and pneumatic fittings.
- Thread form: NPSF (National Pipe Straight Fuel) threads for blind-hole tapping, ideal for accurate, leak‑free connections.
- Flute design: A‑Spiral flute enhances chip evacuation in blind holes, reducing clogging and improving surface finish.
- Material: FORME powder metal substrate delivers exceptional hardness and wear resistance for demanding cutting environments.
- Coating: TiCN coating lowers friction and boosts heat resistance, extending tool life and enabling cleaner finishes.
- Hand and standard: Right‑hand thread compatible with standard tapping operations; conforms to DIN 5156 specifications.
- Size: 3/8" diameter, 18 threads per inch (3/8 x 18 NPSF), suitable for common hydraulic and pneumatic fittings.
- Application: Specifically optimized for blind-hole threading across a range of metals, delivering consistent, high‑quality results.
This tap helps reduce production downtime by maintaining steady penetration and steady chip clearance, even in deeper blind holes. The combination of a robust powder-metal core and a wear-resisting TiCN coating supports faster cutting speeds, better thread accuracy, and longer service life, making it a dependable choice for workshop repairs, assembly, and precision fabrication of hydraulic and pneumatic systems.
Part Numbers
- Protool Part Number
- OSG-48203888
- 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 NPSF A-Spiral Flute - FORME Powder Metal Right Hand -TiCN Coated - Blind Holes
View full collection →You are viewing OSG-48203888. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Shank Diameter | Flutes | DIN | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| OSG-48203885 | 1/16 | 27 | 90 | 6 | 3 | 5156 | £84.75 | 1-2 days | |
| OSG-48203886 | 1/8 | 27 | 90 | 7 | 3 | 5156 | £67.67 | 1-2 days | |
| OSG-48203887 | 1/4 | 18 | 100 | 11 | 3 | 5156 | £90.85 | 1-2 days | |
| OSG-48203888 Viewing | 3/8 | 18 | 100 | 12 | 4 | 5156 | £114.57 | 1-2 days | |
| OSG-48203889 | 1/2 | 14 | 125 | 16 | 4 | 5156 | £159.35 | 1-2 days | |
| OSG-48203890 | 3/4 | 14 | 140 | 20 | 4 | 5156 | £259.14 | 1-2 days | |
| OSG-48203891 | 1 | 11.5 | 160 | 25 | 4 | 5156 | £367.61 | 1-2 days |
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