Sewing machine needle clamp / presser foot thumb screw screw size
M3 · 15.9 mm long
The screws used on Sewing machine needle clamp / presser foot thumb screw are M3, 15.9 mm long.
The record covers retail listing for 'Sewing Machine Needle Clamp Screws - M3.3x15.9mm Presser Foot Thumb Screws' (M3.3, a metric-adjacent variant explicitly labeled with a metric thread designation).
Head and drive, as the source states them: thumb screw (knurled) head.
This entry is marked reported and comes from computerexplorers.com.
An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Sewing machine needle clamp / presser foot thumb screw 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 | 15.9 mm | 0.5 mm | Thumb screw (knurled) | not stated | Retail listing for 'Sewing Machine Needle Clamp Screws - M3.3x15.9mm Presser Foot Thumb Screws' (M3.3, a metric-adjacent variant explicitly labeled with a metric thread designation) | Reported |
Fitment records and sources
Retail listing for 'Sewing Machine Needle Clamp Screws - M3.3x15.9mm Presser Foot Thumb Screws' (M3.3, a metric-adjacent variant explicitly labeled with a metric thread designation)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 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: for thumb screw (knurled) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 15.9 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
- Some sewing-machine screws are labeled with metric-looking but slightly nonstandard sizes (e.g. M3.3) that are not true ISO M3 and are not interchangeable with standard M3 hardware.
- GoPro's own official Dive Housing user guide does not itself state a metric screw size for the housing body; only third-party accessory manufacturer (INON) manuals explicitly cite M6 screws for their add-on arms/adapters attaching to the housing.
More in Displays, TVs & Mounts
The same screw also fits
Devices whose records share a thread with Sewing machine needle clamp / presser foot thumb screw, closest length match first.
- Camera cage cold shoe / accessory arm also M3 × 15.9 mm
- Studio monitor panels also M3 × 15.9 mm
- Partizan / Pilotix PT10 V3 FPV frame also M3 × 15.9 mm
- Wurth Elektronik WA-SSTIE steel spacer stud also M3 × 15.9 mm
- FDM hotend and extruder mounts (general) also M3 × 15.9 mm
- Drone frame arms also M3 × 15.9 mm
- DIN 965 / ISO 7046 countersunk Phillips screw also M3 × 15.9 mm
- Inkjet printer / scanner frames also M3 × 15.9 mm
Questions about Sewing machine needle clamp / presser foot thumb screw screws
- What size screw does Sewing machine needle clamp / presser foot thumb screw use?
- M3 × 15.9 mm for retail listing for 'Sewing Machine Needle Clamp Screws - M3.3x15.9mm Presser Foot Thumb Screws' (M3.3, a metric-adjacent variant explicitly labeled with a metric thread designation).
- How long are the screws in Sewing machine needle clamp / presser foot thumb screw?
- The record gives 15.9 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 Sewing machine needle clamp / presser foot thumb screw?
- 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.