Solar racking T-head bolts screw size
M6 · length not stated in the sources
Solar racking T-head bolts takes M6 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for stainless T-head bolts for aluminium solar profile, M6/M8/M10.
This entry is marked confirmed and comes from hainasolar.com.
For reference, M6 is 6 mm across the threads at 1 mm pitch. The imperial size people confuse it with: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
Solar racking T-head bolts 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 | Stainless T-head bolts for aluminium solar profile, M6/M8/M10stainless | Confirmed |
Fitment records and sources
Stainless T-head bolts for aluminium solar profile, M6/M8/M10
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
- 19-inch racks are not all metric: 10-32 and 12-24 UNC are still the norm in North America, with M6 the metric/square-hole cage-nut option.
- 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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Devices whose records share a thread with Solar racking T-head bolts, closest length match first.
- Canadian Solar CS3U-P / CS3W-P on Soltec SF7 tracker also M6
- Solar panel Z-bracket kit (RV/boat/roof) also M6
- 19in equipment rack (Kendall Howard cage nuts) also M6
- Tripp Lite SmartRack square-hole hardware kit (SRCAGENUTS) also M6
- Weight bench frame also M6
- Hammond CAGKIT rack mounting kit also M6
- Thule Bike Racks (General Replacement) also M6
- Xiaomi M365 / Ninebot brake caliper also M6
Questions about Solar racking T-head bolts screws
- What size screw does Solar racking T-head bolts use?
- M6 for stainless T-head bolts for aluminium solar profile, M6/M8/M10.
- How long are the screws in Solar racking T-head bolts?
- 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 Solar racking T-head bolts?
- 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.