Buy Crow Foot Spanners Online in Australia
Crow Foot Spanner Selection — Quick Reference
Crow foot spanners (crowfoot wrenches) — OPEN-END or RING wrench HEAD with 1/4" / 3/8" / 1/2" / 3/4" socket DRIVE. Workshop + automotive + aviation — combines spanner reach with TORQUE WRENCH precision. Match drive size + jaw style.
| Crow Foot Type | Best For |
|---|---|
| Open-End Crow Foot | Quick onto fastener |
| Ring (Box) Crow Foot | Max grip + torque |
| Flare Nut Crow Foot | Brake + fuel line fittings |
| 1/4" Drive (Small) | Workshop precision |
| 3/8" Drive (Standard) | Workshop automotive |
| 1/2" Drive (Heavy) | Heavy fastener |
| 3/4" / 1" Drive (Industrial) | Heavy industrial |
Critical: When using with TORQUE WRENCH, adjust torque calculation for added LEVER LENGTH from crow foot head. Critical for accurate torque. Brands: Stahlwille, Gedore. Companion: spanners, ratchets + sockets, torque wrenches, hand tools.
Crow foot spanners (sometimes called crowfoot wrenches or open-end crowfoot sockets) are open-jaw spanner heads that fit on a standard ratchet or torque wrench drive. They reach fasteners that a deep socket or normal spanner can't — tube unions on hydraulic and pneumatic lines, in-line bolts on engines and machinery, and any fastener buried behind a pipe or fitting.
What to know
- Drive size — 3/8" drive is the workshop standard; 1/4" for small fasteners, 1/2" for heavier work.
- Open or flare-nut — open-jaw for general use; flare-nut (line) crowfoots wrap further around for fuel and hydraulic tube fittings.
- Torque correction — using a crowfoot extends the wrench length and changes the applied torque. Most factory specs give a correction formula; for short crowfoots in-line with the wrench, the correction is small but worth knowing for critical assemblies.
Companion ranges: Spanners · Sockets · Torque Wrenches
People Also Ask — Crow Foot Spanners
Q: What drive size crow foot spanner should I buy for general workshop use?
3/8" drive is the workshop standard. Step down to 1/4" drive for small, delicate fasteners, or up to 1/2" drive for heavier work.
Q: What's the difference between an open-jaw and a flare-nut crow foot?
Open-jaw crow foots suit general use — they slide straight onto the fastener. Flare-nut (line) crow foots wrap further around the fastener instead, which is what you need on fuel and hydraulic tube fittings.
Q: Why do I need to correct my torque wrench reading when using a crow foot?
Fitting a crow foot onto a torque wrench extends the effective wrench length, which changes the actual torque applied at the fastener. Most factory specs give a correction formula for this — for short crow foots used in-line with the wrench, the correction is small, but it's still worth applying on critical assemblies.
Q: What job is a crow foot spanner suited to that a normal spanner or socket isn't?
Crow foot spanners reach fasteners a deep socket or ordinary spanner can't get to — tube unions on hydraulic and pneumatic lines, in-line bolts on engines and machinery, and fasteners buried behind a pipe or fitting.
Q: Which brands does AIMS stock crow foot spanners from?
Stahlwille and Gedore.