Kayak accessory rail T-bolt kit screw size
M6 · 25 mm long
The screws used on Kayak accessory rail T-bolt kit are M6, 25 mm long.
Where it is used: 304 stainless kayak rail T-bolts with M6 threads for gear mounts.
This entry is marked reported and comes from amazon.com.
M6 means a 6 mm nominal diameter with a 1 mm thread pitch. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
Kayak accessory rail T-bolt kit 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 | 25 mm | 1 mm | not stated | not stated | 304 stainless kayak rail T-bolts with M6 threads for gear mountsstainless | Reported |
Fitment records and sources
304 stainless kayak rail T-bolts with M6 threads for gear mounts
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- On vehicles and bikes, use the original strength class and finish; outdoor hardware is usually stainless or coated to resist corrosion.
- 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.
- The record states 25 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 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
- UR cobot flange bolts are commonly sold/quoted as 'M6 bolts' but the required length depends on the tool thickness; UR's own guidance is bolt class M6-8.8 to ISO4762 without a fixed length, so length must be selected per adapter/tool stack-up, not assumed as a fixed mm value.
- VESA display mounts are M4, M6 or M8 depending on the pattern size; measure before ordering.
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Devices whose records share a thread with Kayak accessory rail T-bolt kit, closest length match first.
- Bicycle disc caliper mount (post / IS) also M6 × 25 mm
- Pride Go-Go scooter tiller lock knob also M6 × 25 mm
- Gas grill cart and legs also M6 × 25 mm
- Small boat deck hardware also M6 × 25 mm
- Motorcycle fairing panels also M6 × 25 mm
- Heavy flat-pack furniture also M6 × 25 mm
- Exercise bike seat post clamp also M6 × 25 mm
- Triumph Thruxton instrument panel spacer block also M6 × 25 mm
Questions about Kayak accessory rail T-bolt kit screws
- What size screw does Kayak accessory rail T-bolt kit use?
- M6 × 25 mm for 304 stainless kayak rail T-bolts with M6 threads for gear mounts.
- How long are the screws in Kayak accessory rail T-bolt kit?
- The record gives 25 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Kayak accessory rail T-bolt kit?
- 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.