Please log in here to access all benefits, including promotional discounts and faster checkouts.

Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - Metric - M12 x 1.5

SKU:BAER-B3021-1

The Baer Heli Coil Tap is the specialist tool you need for impeccable thread repairs and reinforcements with Heli-Coil wire thread inserts. Engineered for durability and precision, this metric bot... Read more ↓
P
M
K
N
Thread FormMetric
SizeM12
Pitch1.5
LeadBottoming Tap (STI)
Thread DirectionRight Hand
Tolerance4H
View all specifications ↓
£20.83
Prices shown ex. VAT
5 days estimated lead time — subject to availability
View Other Sizes →
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
Learn more about Klarna
Speak to our team
01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

The Baer Heli Coil Tap is the specialist tool you need for impeccable thread repairs and reinforcements with Heli-Coil wire thread inserts. Engineered for durability and precision, this metric bottoming tap delivers clean, full-depth threads every time, ensuring reliable performance in a wide range of applications where strongest possible thread engagement matters.

why choose the Baer Heli Coil Tap for M12 x 1.5?

  • Bottoming precision for full-depth threads: Designed as a bottoming tap (STI), it reaches the deepest point of the hole so every inserted coil sits securely and provides maximum grip. Ideal for blind holes where full thread length is critical.
  • Dedicated for Heli-Coil wire inserts: Optimized to create the precise internal thread that mates perfectly with Heli-Coil style inserts, delivering dependable repair and reinforcement without compromise.
  • Metric M12 x 1.5 specification: Clear, standardized thread geometry that aligns with common automotive, industrial, and machinery components—great for restoring damaged M12 threaded holes in steel, aluminum, and cast alloys.
  • Durable, high-performance material: Crafted to endure repeated use in demanding environments, delivering consistent results from the first repair to the hundredth.
  • Easy, predictable operation: Precision ground tool geometry and a robust shank maximize stability in handheld or machine-driven tapping setups, reducing runout and chatter during tapping.

Use cases and practical applications

  • Repair stripped or damaged M12 x 1.5 threads in engine blocks, transmission housings, and machinery housings where coil-insert reinforcement is preferred.
  • Rebuild worn bolt holes in equipment frames, robotics mounts, and agricultural or industrial machinery that rely on secure, vibration-resistant threads.
  • Prepare holes for new fasteners by ensuring a clean, true thread profile that accepts high-strength coil inserts for long-term durability.

Tips for best results

  • Lubricate the tap with a suitable cutting oil to reduce friction and extend tool life.
  • Tap steadily with light-to-moderate feed; back out periodically to clear chips and maintain thread quality.
  • For blind holes, ensure you’re using the bottoming geometry to achieve full thread depth and avoid incomplete engagement.
  • Pair with the correct Heli-Coil insert kit and follow the manufacturer’s installation sequence for optimal reinforcement.

The Baer Heli Coil Tap is a precise, durable solution for technicians, machinists, and DIY enthusiasts who demand reliable, repeatable results when restoring critical M12 x 1.5 threads. When every fastener counts, trust this bottoming tap to deliver clean threads that hold up under load and over time.

Thread Form Metric
Size M12
Pitch 1.5
Lead Bottoming Tap (STI)
Thread Direction Right Hand
Tolerance 4H
Tap Diameter (D1) 14
Flute Length (L2) 30
Overall Length (L1) 95
Shank Diameter (D2) 11.2
Square Drive 9

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.

★★★★★
Nice experience staff are very helpful and interested...
Staff are very helpful and interested in providing a good service making us the customer feel valued.
Bill
★★★★★
first place we look
honest about stock and prices are competitive.
Phil
★★★★★
Polite and helpful
Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
Graham
★★★★★
Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
Jeremy

Full Range: Baer Heli Coil Taps - Wire Thread Insert - Bottoming Tap (STI) - Metric

View full collection →

You are viewing BAER-B3021-1. Click any other SKU to view its full details.

Product SKUSizePitchTap Diameter (D1)Flute Length (L2)Overall Length (L1)Shank Diameter (D2)PriceStock Order
BAER-B3001-1 M20.42.59.544.52.8£11.28 5 days
BAER-B3003-1 M2.50.453.111483.15£11.28 5 days
BAER-B3005-1 M30.53.613534£9.92 5 days
BAER-B3006-1 M3.50.64.313534.5£10.84 5 days
BAER-B3007-1 M40.74.916585£9.92 5 days
BAER-B3008-1 M50.8619666.3£9.92 5 days
BAER-B3009-1 M617.322728£9.92 5 days
BAER-B3010-1 M718.322729£12.27 In Stock
BAER-B3011-1 M81.259.6248010£12.27 5 days
BAER-B3012-1 M819.3248010£12.27 5 days
BAER-B3013-1 M91.2510.625858£15.19 5 days
BAER-B3015-1 M101.511.929899£15.19 5 days
BAER-B3016-1 M101.2511.625858£15.19 5 days
BAER-B3017-1 M10111.325858£15.19 5 days
BAER-B3018-1 M111.512.929899£17.07 5 days
BAER-B3020-1 M121.7514.3309511.2£17.07 5 days
BAER-B3021-1 ViewingM121.514309511.2£20.83 5 days
BAER-B3022-1 M121.2513.6309511.2£20.83 5 days
BAER-B3023-1 M12113.3309511.2£21.97 5 days
BAER-B3027-1 M14216.63210212.5£23.74 5 days
BAER-B3028-1 M141.5163210212.5£23.74 5 days
BAER-B3029-1 M141.2515.63210212.5£23.74 5 days
BAER-B3030-1 M14115.33210212.5£23.74 5 days
BAER-B3033-1 M16218.63711214£29.01 5 days
BAER-B3034-1 M161.5182910414£29.01 5 days
BAER-B3035-1 M182.521.33811816£41.30 5 days
BAER-B3036-1 M18220.62910414£41.30 5 days
BAER-B3037-1 M181.5202910414£41.30 5 days
BAER-B3038-1 M202.523.33811816£45.87 5 days
BAER-B3039-1 M20222.63311316£45.87 5 days
BAER-B3040-1 M201.5223311316£45.87 5 days
BAER-B3041-1 M222.525.34513018£52.83 5 days
BAER-B3042-1 M22224.63512018£52.83 5 days
BAER-B3043-1 M221.5243512018£52.83 5 days
BAER-B3044-1 M24327.94813820£62.57 5 days
BAER-B3045-1 M24226.63712720£62.57 5 days
BAER-B3046-1 M241.5263512018£62.57 5 days
BAER-B3049 M261.5283712720£115.83 5 days
BAER-B3050 M27330.95115122.4£115.83 5 days
BAER-B3051 M27229.63712720£115.83 5 days
BAER-B3052 M271.5293712720£115.83 5 days
BAER-B3053 M281.5303712720£115.83 5 days
BAER-B3054-1 M303.534.65716225£151.96 5 days
BAER-B3055 M30232.63713722.4£151.96 5 days
BAER-B3056 M301.5323713722.4£151.96 5 days
BAER-B3057 M333.537.65716225£157.63 5 days
BAER-B3058 M33235.63714425£157.63 5 days
BAER-B3060 M36441.26017028£175.72 5 days
BAER-B3061 M36339.96017028£175.72 5 days
BAER-B3062 M36238.63915028£175.72 5 days
BAER-B3063 M361.5383915028£175.72 5 days
BAER-B3064-1 M39444.26718731.5£269.70 5 days
BAER-B3065-1 M39342.93914928£229.77 5 days

View Other Sizes

with tools we think you'll like