Please log in here to access all benefits, including promotional discounts and faster checkouts.
OSG Threading Tap NPSF A-Spiral Flute - FORME Powder Metal Right Hand -TiCN Coated - Blind Holes DIN5156 - 1/4 x 18
| Size | 1/4 |
| Pitch | 18 |
| Overall Length | 100 |
| Threading Length | 22 |
Learn more about Klarna
Description
The OSG Threading Tap NPSF A-Spiral Flute is a precision tapping tool designed to form National Pipe Straight Fuel threads in blind holes. Built for professional machinists and production environments, it combines durability with consistent, high‑quality thread results in tight cavities.
- Thread type: NPSF (National Pipe Straight Fuel) threads for reliable, gas- and liquid-tight connections in blind-hole applications.
- Flute design: A‑Spiral flute enhances chip evacuation and reduces clogging during deeper taps, promoting smoother cutting.
- Material: FORME powder metal construction delivers exceptional wear resistance and longevity under demanding cutting conditions.
- Coating: TiCN coating provides improved heat resistance and lower friction, extending tool life and enabling stable cutting speeds.
- Cutting direction: Right-hand tap compatible with standard machining setups and conventional threading sequences.
- Standards: DIN5156 compliant to ensure dimensional accuracy and easy interchangeability with similar DIN-spec taps.
- Size: 1/4 x 18 for common NPSF blind-hole applications and precise fit in piping-related assemblies.
Designed to deliver dependable performance in metalworking workflows, this tap reduces downtime through extended tool life and better finish quality. The combination of FORME powder metal, TiCN coating, and the A‑spiral flute design translates to efficient material removal, cleaner threads, and fewer reworks in production environments where NPSF threads in blind holes are required. Ideal for hydraulic fittings, fuel system components, and other assemblies that demand precise, durable NPSF threading.
Part Numbers
- Protool Part Number
- OSG-48203887
- 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-48203887. 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 Viewing | 1/4 | 18 | 100 | 11 | 3 | 5156 | £90.85 | 1-2 days | |
| OSG-48203888 | 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 |
No products match your filters.
