Derailleur hanger mounting screws screw size
M4 · 10 to 12 mm long
The screws used on Derailleur hanger mounting screws are M4 in lengths from 10 to 12 mm.
It is listed for elanus Parts sells 'M3x10' and 'M4x10 Flat Head Derailleur Hanger Screw' explicitly labeled by metric size for hanger/frame attachment.
Head and drive, as the source states them: flat / countersunk head.
This entry is marked confirmed and comes from elanusparts.com.
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Derailleur hanger 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 |
|---|---|---|---|---|---|---|
| M4 | 10–12 mm | 0.7 mm | Flat / countersunk | not stated | Elanus Parts sells 'M3x10' and 'M4x10 Flat Head Derailleur Hanger Screw' explicitly labeled by metric size for hanger/frame attachment | Confirmed |
Fitment records and sources
Elanus Parts sells 'M3x10' and 'M4x10 Flat Head Derailleur Hanger Screw' explicitly labeled by metric size for hanger/frame attachment
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- For a wall or arm mount, the screw has to engage the threaded insert by several turns but must not bottom out, so measure the insert depth and add the thickness of the bracket and any spacers.
- Diameter: across the threads an M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
- The records span 10–12 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M4 heads take PH2 for Phillips and T20 for Torx, and a 3 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 M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- Display mounts mix systems: the screen side is metric M4/M6, but the wall side of many mounts uses imperial wood screws such as #14 x 2.5in.
- Dashcam mounts advertised as '1/4" M4 screw joint' have two different threads: the 1/4"-20 camera thread and a separate M4 grub screw for the ball joint — don't order the wrong one.
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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M4 x 12mm Black Wafer Head Chainsaw & Cut-off Saw Screws for STIHL MS 460, MS 362, TS480i & TS500i (IS-M4x12) – 10-Pack Replacement
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M4 x 12mm Black Wafer Head Monitor VESA, Neck & Stand Screws for Dell UltraSharp U4320Q & Sceptre Monitors – 8-Pack Replacement
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More in Displays, TVs & Mounts
The same screw also fits
Devices whose records share a thread with Derailleur hanger mounting screws, closest length match first.
- Dell P2219HC also M4 × 10 mm
- ASUS VP249HV also M4 × 10 mm
- Dell U2713H also M4 × 10 mm
- Giada JC530 signage player VESA bracket-to-display mounting (4 screws) also M4 × 10 mm
- LG 47LV3700 also M4 × 12 mm
- LG 55LV3700 also M4 × 12 mm
- Dell P2720DC also M4 × 10 mm
- ASUS VG32VQL1A also M4 × 10 mm
Questions about Derailleur hanger mounting screws screws
- What size screw does Derailleur hanger mounting screws use?
- M4 × 10–12 mm for elanus Parts sells 'M3x10' and 'M4x10 Flat Head Derailleur Hanger Screw' explicitly labeled by metric size for hanger/frame attachment.
- How long are the screws in Derailleur hanger mounting screws?
- The records range from 10 to 12 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for Derailleur hanger mounting screws?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.