Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker screw size
M6 · length not stated in the sources
Our records put Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker on M6 screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers M6 bolt with M6 plain washer (18mm OD) bolting the module to the tracker rail.
This entry is marked confirmed and comes from canadiansolar.com.
An M6 screw is 6 mm in diameter with a 1 mm pitch, tapped with a 5 mm drill; imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker 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 |
|---|---|---|---|---|---|---|
| M6 | not stated | 1 mm | not stated | not stated | M6 bolt with M6 plain washer (18mm OD) bolting the module to the tracker railwasher / flange face | Confirmed |
Fitment records and sources
M6 bolt with M6 plain washer (18mm OD) bolting the module to the tracker rail
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- Diameter: across the threads an M6 screw measures about 6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 1 mm from one thread crest to the next (10 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.
- Driver: the source does not name the drive. Standard M6 heads take PH3 for Phillips and T30 for Torx, and a 5 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 M6 is about 7-10 N·m into metal threads and 2.5-4.0 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M6
- Hygienic/3-A food-industry M6 screws are a distinct fastener class (with integrated sealing gasket/washer) from standard DIN 912 M6 socket-head screws; substituting a plain DIN 912 M6 screw on food/sanitary equipment breaks the hygienic seal even though the thread is nominally the same size.
- Rack hole threads vary: 10-32 and 12-24 are still common in US racks alongside M6 - check the rail before buying.
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Questions about Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker screws
- What size screw does Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker use?
- M6 for M6 bolt with M6 plain washer (18mm OD) bolting the module to the tracker rail.
- How long are the screws in Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- What is the thread pitch of an M6 screw?
- 1 mm (coarse), which is the standard pitch for M6 machine screws; a 0.75 mm fine pitch exists but is uncommon. The tap drill is 5 mm and the normal clearance hole is 6.6 mm.
- What screwdriver do I need for Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker?
- The sources do not name the drive. For M6, Phillips heads normally take PH3 and Torx heads T30; socket heads take a 5 mm hex key.
- Can I use an imperial screw instead of M6?
- No. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6. Use a true M6 screw so it does not cross-thread or strip the hole.