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Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNF - 5/8 x 18
| Thread Form | UNF |
| Size | 5/8 |
| Pitch | 18 |
| Lead | Bottoming Tap (STI) |
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Description
The Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNF - 5/8 x 18 is the precise, durable tool you reach for when threads need repair, reinforcement, or restoration with Heli-Coil inserts. Built for professional reliability, this bottoming tap delivers clean, accurate thread formation that stands up to demanding applications and repeated use.
- Bottoming design for full-depth engagement—reaches the very bottom of blind holes to ensure each insert threads in securely, maximizing strength and longevity.
- HSS-G heat-treated construction—crafted from high-speed steel and hardened for wear resistance, delivering consistent performance across steel, cast iron, and aluminum components.
- UNF compatibility, 5/8 x 18—precisely engineered for standard UNF threads, making it a dependable choice for automotive, industrial, and mechanical repairs.
- Optimized for Heli-Coil inserts—designed to work in harmony with wire thread inserts, ensuring the insert coils bite cleanly into accurately formed threads for reliable load transfer and torque tolerance.
- Consistent, burr-free results—tightly controlled geometry and flute design minimize chip buildup and reduce the risk of cross-threading during installation.
Ideal use cases
Whether you’re repairing stripped threads on engine blocks, transmission housings, or machinery housings, this tap provides the precision needed for a dependable insert installation. It’s equally suited for fabrication shops, maintenance teams, and hobbyists tackling metalwork projects where strong, vibration-resistant threads are essential.
Practical guidance for best results
- Use a light cutting lubricant and steady, straight pressure to maintain thread integrity.
- Align the tap carefully with the hole to prevent cross-threading and ensure the bottoming section engages correctly.
- Tap only to the depth required for the Heli-Coil insert you’re using; avoid over-tapping to protect surrounding material.
- Pair with proper Heli-Coil inserts and tang removal tools to complete a secure, lasting repair.
Why choose this tap? It’s not just about cutting threads—it's about enabling durable repairs that restore original strength. The Baer Heli Coil Tap is purpose-built to work with insert systems, delivering repeatable results you can trust in mission-critical components and everyday hardware alike.
Part Numbers
- Protool Part Number
- BAER-B3161
- Brand
- BAER
- Category
- Heli Coil Tap
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
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: Baer Heli Coil Taps - Wire Thread Insert - Bottoming Tap (STI) - UNF
View full collection →You are viewing BAER-B3161. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Tap Diameter (D1) | Flute Length (L2) | Overall Length (L1) | Shank Diameter (D2) | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| BAER-B3151 | No. 4 | 48 | 3.5 | 13 | 53 | 4 | £14.86 | 5 days | |
| BAER-B3152 | No. 6 | 40 | 4.3 | 13 | 53 | 4.5 | £14.86 | 5 days | |
| BAER-B3153 | No. 8 | 36 | 5.1 | 17 | 62 | 5.6 | £14.86 | 5 days | |
| BAER-B3154 | No. 10 | 32 | 5.9 | 19 | 66 | 6.3 | £14.86 | 5 days | |
| BAER-B3155 | 1/4 | 28 | 7.5 | 19 | 69 | 8 | £9.77 | 5 days | |
| BAER-B3156 | 5/16 | 24 | 9.3 | 20 | 76 | 10 | £10.84 | 5 days | |
| BAER-B3157 | 3/8 | 24 | 10.9 | 22 | 82 | 8 | £11.13 | 5 days | |
| BAER-B3158 | 7/16 | 20 | 12.8 | 24 | 84 | 9 | £14.86 | 5 days | |
| BAER-B3159 | 1/2 | 20 | 14.4 | 25 | 90 | 11.2 | £16.89 | 5 days | |
| BAER-B3160 | 9/16 | 18 | 16.1 | 29 | 104 | 12.5 | £28.50 | 5 days | |
| BAER-B3161 Viewing | 5/8 | 18 | 17.7 | 29 | 104 | 14 | £35.14 | 5 days | |
| BAER-B3162 | 3/4 | 16 | 21.1 | 29 | 104 | 14 | £43.03 | 5 days | |
| BAER-B3163 | 7/8 | 14 | 24.6 | 35 | 120 | 18 | £62.05 | 5 days | |
| BAER-B3164 | 1 | 12 | 28.2 | 37 | 127 | 20 | £62.05 | 5 days | |
| BAER-B3165 | 1 | 14 | 27.8 | 37 | 127 | 20 | £62.90 | 5 days |
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