Violin chinrest (c:dix system, 3/4–4/4) screw size
M3 · 27 mm long
The screws used on Violin chinrest (c:dix system, 3/4–4/4) are M3, 27 mm long.
It is listed for chinrest clamp barrel screw, stainless.
This entry is marked confirmed and comes from dictum.com.
For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Violin chinrest (c:dix system, 3/4–4/4) 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 |
|---|---|---|---|---|---|---|
| M3 | 27 mm | 0.5 mm | not stated | not stated | chinrest clamp barrel screw, stainlessstainless | Confirmed |
Fitment records and sources
chinrest clamp barrel screw, stainless
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Instrument and audio hardware often threads into wood or thin metal; a screw that is too long can poke through a finished surface.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 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 27 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 M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M3
- Terminal-block clamp screws have manufacturer-specific torque values — over-tightening cracks the block or crushes the wire.
- Thorlabs' 16mm cage system standard plates use dual 4-40 (UNC) and M3 taps on the same plate (e.g., SP01), so metric and imperial fasteners are both valid depending on the region/kit purchased.
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Devices whose records share a thread with Violin chinrest (c:dix system, 3/4–4/4), closest length match first.
- Voron 2.4 / Trident printed parts also M3 × 27 mm
- Nerf blaster thumbscrews (mid sizes) also M3 × 27 mm
- Prusa i3 MK3S/MK4 printed parts and extruder also M3 × 27 mm
- Prusa MK3S extruder also M3 × 27 mm
- PC case & radiator fans also M3 × 27 mm
- Voron 2.4 / Trident also M3 × 27 mm
- Voron 2.4 gantry and carriage hardware also M3 × 27 mm
- Bambu Lab X1 / P1 / A1 frame and toolhead also M3 × 27 mm
Questions about Violin chinrest (c:dix system, 3/4–4/4) screws
- What size screw does Violin chinrest (c:dix system, 3/4–4/4) use?
- M3 × 27 mm for chinrest clamp barrel screw, stainless.
- How long are the screws in Violin chinrest (c:dix system, 3/4–4/4)?
- The record gives 27 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for Violin chinrest (c:dix system, 3/4–4/4)?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.