Car license plate mounting screws screw size
M6 · 16 to 20 mm long
The screws used on Car license plate mounting screws are M6 in lengths from 16 to 20 mm.
Where it is used: wurth, Dorman and Clipstok all list license plate screws explicitly as 'M6-1.0 x 16/20mm' for automotive use.
This entry is marked confirmed and comes from wurthusa.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.
Car license plate mounting screws 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 | 16–20 mm | 1 mm | not stated | not stated | Wurth, Dorman and Clipstok all list license plate screws explicitly as 'M6-1.0 x 16/20mm' for automotive use | Confirmed |
Fitment records and sources
Wurth, Dorman and Clipstok all list license plate screws explicitly as 'M6-1.0 x 16/20mm' for automotive use
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 records span 16–20 mm, which means different positions take different lengths — match each hole to its own screw.
- 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
- Manual explicitly warns that under-tightening this M6 hinge screw can let the door glass crash into the drum, so torque compliance matters more than just thread match.
- Trailer license plate mounts frequently use 1/4 inch screws in the US, but international and many modern bracket kits have shifted to M6.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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M6 x 16mm Black Wafer Head Rack Screws for Rittal DK 7094.100 / 7094.110 / 7094.140 19-inch Rack – 20-Pack Replacement
$8.99Choose size -
M6 x 16mm Black Wafer Head Awning & Box Screws for Thule Awning 326 / 327 / 328, Conduit Box 317 & Xpedition 820 / 821 (50333) – 8-Pack Replacement
$6.99Choose size
More in Vehicles, Marine & Mobility
The same screw also fits
Devices whose records share a thread with Car license plate mounting screws, closest length match first.
- Motorcycle fairing panels also M6 × 16–20 mm
- Small boat deck hardware also M6 × 16–20 mm
- Car license plate U-clip retaining fasteners (trim) also M6 × 16–20 mm
- Shimano Deore BR-M6100 disc brake caliper also M6 × 18 mm
- Exercise bike seat post clamp also M6 × 20 mm
- Shimano BR-M6100 disc brake caliper also M6 × 18 mm
- Gas grill cart and legs also M6 × 20 mm
- VMAC Multifunction Power System D600007 also M6 × 16 mm
Questions about Car license plate mounting screws screws
- What size screw does Car license plate mounting screws use?
- M6 × 16–20 mm for wurth, Dorman and Clipstok all list license plate screws explicitly as 'M6-1.0 x 16/20mm' for automotive use.
- How long are the screws in Car license plate mounting screws?
- The records range from 16 to 20 mm depending on the position, so match each screw to its own hole.
- 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 Car license plate mounting screws?
- 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.