Honda Grom (2024) screw size
M5 / M6 · 40 mm long
The screws used on Honda Grom (2024) are M5 and M6, 40 mm long.
There are 2 separate fitment records for it, including grommet screw for body components (Part 91627T6G003) (M5) and side cover bolt (specified as 6x40 in parts list) (M6).
2 of the 2 records are marked confirmed, drawn from 2 sources (buyallparts.com and hondagrom.net).
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.
Honda Grom (2024) 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 | not stated | 0.8 mm | not stated | not stated | Grommet screw for body components (Part 91627T6G003) | Confirmed |
| M6 | 40 mm | 1 mm | not stated | not stated | Side cover bolt (specified as 6x40 in parts list) | Confirmed |
Fitment records and sources
Grommet screw for body components (Part 91627T6G003).
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
Side cover bolt (specified as 6x40 in parts list).
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 M5 screw measures about 5 mm with calipers (usually a hair under). This device also uses M6, so measure each screw rather than assuming they match.
- 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 40 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 / M6
- Carbon bosses strip easily: 2-4 Nm torque and the right length so the bolt doesn't bottom out.
- 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.
- 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 displays over 50kg move up to M8 x 1.25, which is outside metric M6 hardware - don't force an M6 bolt into a heavy-panel mount.
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Devices whose records share a thread with Honda Grom (2024), closest length match first.
- Exercise bike seat post clamp also M6 × 40 mm
- Metal table leg bracket also M6 × 40 mm
- Signage standoffs also M6 × 40 mm
- Bed frame side rails also M6 × 40 mm
- Speaker flying frame / eyebolt hardware also M6 × 40 mm
- FJD 3D Excavator Guidance System (GNSS/IMU hardware) also M6 × 40 mm
- Electrolux Professional compact rack-type dishwasher also M6 × 40 mm
- Universal full-motion TV mount kits also M6 × 40 mm
Questions about Honda Grom (2024) screws
- What size screw does Honda Grom (2024) use?
- M5 for grommet screw for body components (Part 91627T6G003); M6 × 40 mm for side cover bolt (specified as 6x40 in parts list).
- How long are the screws in Honda Grom (2024)?
- The record gives 40 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 Honda Grom (2024)?
- 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.