DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware screw size
M3 · 6 mm long
If you are replacing a screw on DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware, the thread is M3, 6 mm long.
Where it is used: listing explicitly identifies part as "DIN 7500 M3×6 is a metric" screw stocked as aircraft parts inventory.
This entry is marked reported and comes from aircraftpartsstore.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.
DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware 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 | 6 mm | 0.5 mm | not stated | not stated | Listing explicitly identifies part as "DIN 7500 M3×6 is a metric" screw stocked as aircraft parts inventory | Reported |
Fitment records and sources
Listing explicitly identifies part as "DIN 7500 M3×6 is a metric" screw stocked as aircraft parts inventory
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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The record states 6 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
- Telescope thumbscrews are sold in a wide non-metric legacy range too (1/4-20, 8-32, 10-32 on many Meade/Celestron mounts), so metric M3/M4 fitment applies mainly to newer/international accessory ecosystems (SkyWatcher, generic 1.25" accessories) and should not be assumed universal.
- 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.
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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M3 x 6mm Replacement Screws for XLR Audio Connectors Phillips Wafer Head 50-Pack
$4.99 -
M3 x 6mm Phillips Wafer Head Carbon Steel Machine Screws for XLR Audio Connectors | 50-Pack (Black)
$4.99
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M3 x 6mm Phillips Wafer Head Screw for 3D Printer Frame Assembly - Single Replacement Black
$0.10 each · min. 50
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M3 x 6mm Phillips Wafer Head Screw for Boutique Guitar Pedal Enclosure - Single Replacement Black
$0.10 each · min. 50
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Devices whose records share a thread with DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware, closest length match first.
- Dell P2418HZ also M3 × 6 mm
- Dell P2418HT also M3 × 6 mm
- Dell U3415W also M3 × 6 mm
- Dell P2719HC also M3 × 6 mm
- Dell U3419W also M3 × 6 mm
- Dell U2718QM also M3 × 6 mm
- Camera cage cold shoe / accessory arm also M3 × 6 mm
- Dell U2715H also M3 × 6 mm
Questions about DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware screws
- What size screw does DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware use?
- M3 × 6 mm for listing explicitly identifies part as "DIN 7500 M3×6 is a metric" screw stocked as aircraft parts inventory.
- How long are the screws in DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware?
- The record gives 6 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 DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware?
- 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.
- Where can I buy replacement screws for DIN 7500 rolled-thread machine screw sold as aviation/aircraft hardware?
- TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.