Buy Thread Chasers Online in Australia
Thread Chaser Selection — Quick Reference
Thread chasers — CLEAN + REPAIR damaged + dirty + corroded EXTERNAL threads without removing material. Workshop + automotive + maintenance + production thread restoration. Tap-style chasers + file-style chasers + repair kits.
| Thread Chaser Type | Best For |
|---|---|
| External Thread Chaser (Die) | Bolt + stud thread restoration |
| Internal Thread Chaser (Tap) | Nut + threaded hole restoration |
| Thread File (Multi-Pitch) | Pocket thread restoration |
| Metric Coarse + Fine Set | Workshop standard range |
| Imperial UNC + UNF Set | Automotive + AS imperial |
| BSP Pipe Thread Chaser | Plumbing + pipe restoration |
| Premium Cobalt / HSS | Long life + hard material |
Critical: Use cutting LUBRICANT — see cutting lubricants. Chasers REMOVE DIRT not METAL — for stripped threads use Recoil thread inserts. Brands: Sutton Tools, P&N. Companion: taps, dies, threading, extraction tools.
Thread Chasers for Australian Workshop Thread Repair
Thread chasers are the cutting tools used to clean and restore damaged threads — both internal (in tapped holes) and external (on bolts and studs) — without removing significant metal that would change the thread fit. Where new threads cut with a tap or die would oversize the thread, a chaser cleans rust, debris, and minor damage from existing threads while preserving the original thread fit. For Australian fitters, mechanics, and repair workshops, thread chasers are essential for preserving threaded components rather than replacing them. AIMS Industrial supplies thread chasers in metric and imperial sizes from Sutton Tools and Bordo.
The thread chaser types we stock
- Internal thread chasers — for cleaning and restoring threads in tapped holes (similar to a tap but designed to chase rather than cut)
- External thread chasers — for cleaning and restoring threads on bolts, studs, and external-thread components
- Thread chaser sets — multiple sizes in a hard case covering common metric or imperial ranges
- Thread file (multi-thread chaser) — file-style tool with multiple thread pitches on different faces; for varied thread chasing on one tool
- Plug chasers — for restoring spark plug threads in engine cylinder heads
Where thread chasers earn their place
- Damaged thread restoration — cleaning rust, paint, and minor mechanical damage from threaded components
- Pre-installation thread cleaning — removing manufacturing debris from new components before final assembly
- Stuck-fastener recovery — restoring cross-threaded or partially-stripped threads to allow fastener removal
- Engine and equipment service — particularly spark plug threads, head bolt threads, and similar high-temperature applications
- Heritage and restoration work — preserving original threaded components rather than replacing them
Chasers versus taps and dies
- Taps and dies — cut new threads, removing significant metal in the process; intended for producing fresh threads in unthreaded material
- Thread chasers — clean and restore existing threads without removing significant metal; preserve the thread fit
Don't substitute taps for chasing damaged threads — the tap removes metal and oversizes the thread, ruining the fit with the matching component. Use chasers for thread restoration; reserve taps for producing fresh threads.
Sizing
Thread chasers come in metric (M3 through M30) and imperial (UNF, UNC, BSW) sizes covering the common thread standards. Chaser sets typically include both internal and external chasers in matched sizes for general repair work. For specific applications (spark plugs, brake fittings, hydraulic fittings), specialised chasers may be needed.
Chasing practice
Use cutting fluid (Tap Magic or Molycut) to lubricate the chase. For internal chasers, turn the chaser into the threaded hole as you would a tap, applying steady moderate pressure. For external chasers, use a die holder or thread chaser handle. Run the chaser through the full thread length to clean the entire thread. Don't apply excessive force — chasers cut lightly to clean rather than aggressively to remove material. Stop and back out periodically to clear chips.
Brands stocked at AIMS
Sutton Tools and Bordo cover the thread chaser range in HSS. Champion is stocked for selected sizes. For specialty applications (spark plug chasers, fitting-specific chasers), sourcing through our distribution channels covers most options.
Companion ranges at AIMS
Thread chasers sit alongside our broader threading tool range — see metric hand taps, threading tools, thread measuring gauges, and screw pitch gauges for the related products.
Need help speccing thread chasers for repair or restoration work? contact our team — we'll match by thread standard, size, and application.