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Wiseman Threading Tools Taper Lead Metric HSS Tap Left Hand - M20x1.5
| Thread Form | Metric |
| Size | M20 |
| Pitch | 1.5 |
| Tap Type | Taper Lead Tap |
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Description

The Wiseman Threading Tools Taper Lead Metric HSS Tap Left Hand - M20x1.5 is a precision hand tap crafted for reliable left-hand thread cutting in metal. Constructed from high-speed steel and ground for a clean, accurate finish, this tap is a dependable choice for general purpose threading tasks where reverse-threaded fasteners are required or where you need to back out a stubborn fastener.
- Left-hand threading: Cuts threads that tighten counterclockwise, ideal for assemblies that rely on reverse torque or for easy removal of components with reverse-threaded fasteners.
- Taper lead geometry: The initial chamfered start reduces entry effort and helps prevent cross‑threading, making threading in difficult holes smoother and more controllable.
- ISO 529 compliant, M20x1.5: Precise metric dimensions ensure compatibility with standard holes, gauges, and mating parts, delivering consistent results across projects.
- High-speed steel, ground, uncoated: A durable, general‑purpose tool designed for repeated use in steel, cast iron, aluminum, and other common metals. Uncoated surfaces provide robust performance, especially when paired with appropriate cutting fluid.
- Versatile, practical threading tool: Ideal for through holes and situations where a tapered entry helps initiate the cut, followed by steady thread formation to the desired depth.
Designed for professionals and serious hobbyists alike, this tap delivers dependable performance where it matters: accurate thread formation, smooth starting, and reliable left-handed operation. Use with a compatible tap wrench and correct cutting fluid, and follow standard tapping practices to maximize tool life and thread quality. The M20x1.5 tap’s ISO 529 dimensions ensure you can pair it with standard taps, gauges, and parts, making it a practical addition to any metalworking toolkit.
Part Numbers
- Protool Part Number
- T14755LH4T
- Brand
- Wiseman
- Category
- Hand 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: Wiseman Threading Tools Taper Lead Metric HSS Taps Left Hand
View full collection →You are viewing T14755LH4T. Click any other SKU to view its full details.
| Product SKU | Thread Form | Size | Pitch | Tap Type | Thread Direction | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| T10155LH4T | Metric | M2 | 0.4 | Taper Lead Tap | Left Hand | £18.11 | 1-2 days | |
| T10405LH4T | Metric | M2.5 | 0.45 | Taper Lead Tap | Left Hand | £17.92 | 1-2 days | |
| T10555LH4T | Metric | M3 | 0.5 | Taper Lead Tap | Left Hand | £11.41 | 1-2 days | |
| T10755LH4T | Metric | M3.5 | 0.6 | Taper Lead Tap | Left Hand | £12.65 | 1-2 days | |
| T10855LH4T | Metric | M4 | 0.7 | Taper Lead Tap | Left Hand | £9.66 | 1-2 days | |
| T11005LH4T | Metric | M4.5 | 0.75 | Taper Lead Tap | Left Hand | £19.68 | 1-2 days | |
| T11155LH4T | Metric | M5 | 0.8 | Taper Lead Tap | Left Hand | £9.69 | 1-2 days | |
| T11405LH4T | Metric | M6 | 1 | Taper Lead Tap | Left Hand | £9.69 | 1-2 days | |
| T11605LH4T | Metric | M7 | 1 | Taper Lead Tap | Left Hand | £16.32 | 1-2 days | |
| T11755LH4T | Metric | M8 | 0.5 | Taper Lead Tap | Left Hand | £30.52 | 1-2 days | |
| T11805LH4T | Metric | M8 | 0.75 | Taper Lead Tap | Left Hand | £21.32 | 1-2 days | |
| T11855LH4T | Metric | M8 | 1 | Taper Lead Tap | Left Hand | £21.32 | 1-2 days | |
| T11905LH4T | Metric | M8 | 1.25 | Taper Lead Tap | Left Hand | £11.45 | 1-2 days | |
| T12105LH4T | Metric | M9 | 1 | Taper Lead Tap | Left Hand | £22.47 | 1-2 days | |
| T12155LH4T | Metric | M9 | 1.25 | Taper Lead Tap | Left Hand | £21.38 | 1-2 days | |
| T12305LH4T | Metric | M10 | 0.75 | Taper Lead Tap | Left Hand | £30.87 | 1-2 days | |
| T12405LH4T | Metric | M10 | 1 | Taper Lead Tap | Left Hand | £21.32 | 1-2 days | |
| T12455LH4T | Metric | M10 | 1.25 | Taper Lead Tap | Left Hand | £21.32 | 1-2 days | |
| T12505LH4T | Metric | M10 | 1.5 | Taper Lead Tap | Left Hand | £16.87 | 1-2 days | |
| T12755LH4T | Metric | M11 | 1.5 | Taper Lead Tap | Left Hand | £37.64 | 1-2 days | |
| T12955LH4T | Metric | M12 | 1 | Taper Lead Tap | Left Hand | £31.86 | 1-2 days | |
| T13005LH4T | Metric | M12 | 1.25 | Taper Lead Tap | Left Hand | £31.86 | 1-2 days | |
| T13055LH4T | Metric | M12 | 1.5 | Taper Lead Tap | Left Hand | £29.13 | 1-2 days | |
| T13105LH4T | Metric | M12 | 1.75 | Taper Lead Tap | Left Hand | £23.71 | 1-2 days | |
| T13205LH4T | Metric | M13 | 1 | Taper Lead Tap | Left Hand | £63.84 | 1-2 days | |
| T13505LH4T | Metric | M14 | 1 | Taper Lead Tap | Left Hand | £68.63 | 1-2 days | |
| T13555LH4T | Metric | M14 | 1.25 | Taper Lead Tap | Left Hand | £32.79 | 1-2 days | |
| T13605LH4T | Metric | M14 | 1.5 | Taper Lead Tap | Left Hand | £28.33 | 1-2 days | |
| T13655LH4T | Metric | M14 | 2 | Taper Lead Tap | Left Hand | £28.33 | 1-2 days | |
| T13905LH4T | Metric | M16 | 1 | Taper Lead Tap | Left Hand | £45.83 | 1-2 days | |
| T14005LH4T | Metric | M16 | 1.5 | Taper Lead Tap | Left Hand | £34.76 | 1-2 days | |
| T14105LH4T | Metric | M16 | 2 | Taper Lead Tap | Left Hand | £37.64 | 1-2 days | |
| T14155LH4T | Metric | M17 | 1 | Taper Lead Tap | Left Hand | £56.45 | 1-2 days | |
| T14305LH4T | Metric | M18 | 1 | Taper Lead Tap | Left Hand | £55.07 | 1-2 days | |
| T14405LH4T | Metric | M18 | 1.5 | Taper Lead Tap | Left Hand | £46.60 | 1-2 days | |
| T14455LH4T | Metric | M18 | 2 | Taper Lead Tap | Left Hand | £57.21 | 1-2 days | |
| T14505LH4T | Metric | M18 | 2.5 | Taper Lead Tap | Left Hand | £46.60 | 1-2 days | |
| T14655LH4T | Metric | M20 | 1 | Taper Lead Tap | Left Hand | £63.61 | 1-2 days | |
| T14755LH4T Viewing | Metric | M20 | 1.5 | Taper Lead Tap | Left Hand | £53.22 | 1-2 days | |
| T14805LH4T | Metric | M20 | 2 | Taper Lead Tap | Left Hand | £78.48 | 1-2 days | |
| T14855LH4T | Metric | M20 | 2.5 | Taper Lead Tap | Left Hand | £72.52 | 1-2 days | |
| T15055LH4T | Metric | M22 | 1 | Taper Lead Tap | Left Hand | £78.48 | 1-2 days | |
| T15155LH4T | Metric | M22 | 1.5 | Taper Lead Tap | Left Hand | £72.52 | 1-2 days | |
| T15255LH4T | Metric | M22 | 2 | Taper Lead Tap | Left Hand | £78.48 | 1-2 days | |
| T15305LH4T | Metric | M22 | 2.5 | Taper Lead Tap | Left Hand | £61.64 | 1-2 days | |
| T15455LH4T | Metric | M24 | 1 | Taper Lead Tap | Left Hand | £86.27 | 1-2 days | |
| T15555LH4T | Metric | M24 | 1.5 | Taper Lead Tap | Left Hand | £81.88 | 1-2 days | |
| T15605LH4T | Metric | M24 | 2 | Taper Lead Tap | Left Hand | £94.50 | 1-2 days | |
| T15655LH4T | Metric | M24 | 3 | Taper Lead Tap | Left Hand | £80.67 | 1-2 days | |
| T15755LH4T | Metric | M25 | 1.5 | Taper Lead Tap | Left Hand | £67.56 | 1-2 days | |
| T15855LH4T | Metric | M26 | 1 | Taper Lead Tap | Left Hand | £95.68 | 1-2 days | |
| T15905LH4T | Metric | M26 | 1.5 | Taper Lead Tap | Left Hand | £95.68 | 1-2 days | |
| T16055LH4T | Metric | M27 | 1.5 | Taper Lead Tap | Left Hand | £107.21 | 1-2 days | |
| T16155LH4T | Metric | M27 | 3 | Taper Lead Tap | Left Hand | £82.58 | 1-2 days | |
| T16455LH4T | Metric | M30 | 1 | Taper Lead Tap | Left Hand | £132.96 | 1-2 days | |
| T16505LH4T | Metric | M30 | 1.5 | Taper Lead Tap | Left Hand | £141.73 | 1-2 days | |
| T16555LH4T | Metric | M30 | 2 | Taper Lead Tap | Left Hand | £141.73 | 1-2 days | |
| T16655LH4T | Metric | M30 | 3.5 | Taper Lead Tap | Left Hand | £88.94 | 1-2 days | |
| T16855LH4T | Metric | M32 | 1.5 | Taper Lead Tap | Left Hand | £138.84 | 1-2 days | |
| T17155LH4T | Metric | M33 | 3.5 | Taper Lead Tap | Left Hand | £106.56 | 1-2 days | |
| T17405LH4T | Metric | M35 | 1.5 | Taper Lead Tap | Left Hand | £149.71 | 1-2 days | |
| T17705LH4T | Metric | M36 | 4 | Taper Lead Tap | Left Hand | £105.72 | 1-2 days | |
| T18705LH4T | Metric | M42 | 1.5 | Taper Lead Tap | Left Hand | £206.69 | 1-2 days |
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