Husqvarna 365 / 545 / 560 chainsaw housing screw size
M5 · 20 mm long
Husqvarna 365 / 545 / 560 chainsaw housing takes M5 metric screws, 20 mm long.
Where it is used: genuine Husqvarna 525 75 52-03 M5 x 20mm T27 screw, strength class 12.9.
This entry is marked confirmed and comes from lsengineers.co.uk.
An M5 screw is 5 mm in diameter with a 0.8 mm pitch, tapped with a 4.2 mm drill; imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
Husqvarna 365 / 545 / 560 chainsaw housing screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M5 | 20 mm | 0.8 mm | not stated | not stated | Genuine Husqvarna 525 75 52-03 M5 x 20mm T27 screw, strength class 12.9 | Confirmed |
Fitment records and sources
Genuine Husqvarna 525 75 52-03 M5 x 20mm T27 screw, strength class 12.9
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Check the strength class stamped on the head (8.8, 10.9, A2-70) and replace like for like.
- Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.8 mm from one thread crest to the next (12.5 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The record states 20 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source does not name the drive. Standard M5 heads take PH2 for Phillips and T25 for Torx, and a 4 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M5
- Wheelchair and mobility OEM screws specify an exact standard and strength class (ISO 7045 CL4.8, ISO 4762 CL12.9). Matching only the thread size can cause a failure under load.
- Husqvarna alone mixes M5 (trimmer and chainsaw housings) and M6 (brushcutter/mower housings), so screws are not interchangeable across their own models.
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Questions about Husqvarna 365 / 545 / 560 chainsaw housing screws
- What size screw does Husqvarna 365 / 545 / 560 chainsaw housing use?
- M5 × 20 mm for genuine Husqvarna 525 75 52-03 M5 x 20mm T27 screw, strength class 12.9.
- How long are the screws in Husqvarna 365 / 545 / 560 chainsaw housing?
- The record gives 20 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M5 screw?
- 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
- What screwdriver do I need for Husqvarna 365 / 545 / 560 chainsaw housing?
- The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
- Can I use an imperial screw instead of M5?
- No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.