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Wiseman Threading Tools Taper Lead Metric HSS Tap Left Hand - M8x1
| Thread Form | Metric |
| Size | M8 |
| Pitch | 1 |
| Tap Type | Taper Lead Tap |
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Description

Meet the Wiseman Threading Tools Taper Lead Metric HSS Tap Left Hand - M8x1, a purpose-built left‑hand thread cutting tool engineered for dependable performance in metalworking projects. Built to exacting standards, this tap delivers clean, accurate threads with minimal effort, making it a reliable companion for shops and hobbyists alike.
Why this left‑hand HSS tap stands out
- Left-hand threading designed for reverse-turn applications—perfect when the assembly requires a thread that tightens as you turn in the opposite direction or when removing damaged threads.
- M8x1 metric sizing with taper lead for easier starting cuts in harder materials, reducing the risk of cross-threading and guiding the tool into the hole smoothly.
- High-speed steel (HSS), ground finish for precise tooth geometry and durable cutting edges that resist wear during repeated use.
- Uncoated for broad material compatibility and predictable cutting performance across common metals, from steel to softer alloys.
- ISO 529 dimensions ensures compatibility with standard tapping practices and leverages established tolerances for reliable results.
Ideal uses and practical applications
This taper lead HSS tap is well-suited for general-purpose threading tasks where a left-hand M8x1 thread is required. Use it for repair work on components with reverse-thread requirements, maintenance on machinery, or fabricating assemblies that rely on left-handed fasteners. It pairs best with a standard tap wrench and cutting fluid or light oil to optimize chip evacuation and extend tool life.
What to expect in use
- Starting the thread is smoother thanks to the taper lead, reducing chatter and binding during the initial cuts.
- Accurate thread form is achieved through precise grinding and ISO-compliant dimensions, helping ensure a proper fit with corresponding nuts or threaded parts.
- Reliable performance across common metals makes it a versatile choice for both professional shops and DIY projects.
Tips for longevity and best results
- Always pair the tap with appropriate lubrication and a quality tapping wrench; avoid dry tapping to reduce edge wear.
- Drill the correct pilot hole per M8x1 specifications before tapping to minimize the chance of cross-threading or broken taps.
- Clean chips promptly and avoid forcing the tool; use steady, even pressure to maintain thread accuracy.
- Store in a dry environment to preserve the sharpness of the ground threads for as long as possible.
With its combination of left-hand threading, taper lead, and ISO-standard dimensions, the Wiseman Threading Tools Tap is a precise, durable choice for anyone tackling M8x1 projects where reliable reverse-thread cutting matters. From maintenance tasks to precision fabrication, this tap helps you achieve clean, dependable threads every time.
Part Numbers
- Protool Part Number
- T11855LH4T
- 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
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| 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 Viewing | 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 | 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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