Bluelab PeriPod M3 Automatic Nutrient/pH Dosing Pump (aquarium/hydroponic dosing equipment) screw size
M3 · length not stated in the sources
The screws used on Bluelab PeriPod M3 Automatic Nutrient/pH Dosing Pump (aquarium/hydroponic dosing equipment) are M3. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for care and use guide for the PeriPod M3 multi-channel peristaltic doser used on aquarium/reservoir setups; wall-mount bracket is secured using M3 screws per the mounting instructions.
This entry is marked likely and comes from plantplanet.de.
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.
Bluelab PeriPod M3 Automatic Nutrient/pH Dosing Pump (aquarium/hydroponic dosing equipment) 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 | not stated | 0.5 mm | not stated | not stated | Care and use guide for the PeriPod M3 multi-channel peristaltic doser used on aquarium/reservoir setups; wall-mount bracket is secured using M3 screws per the mounting instructions | Likely |
Fitment records and sources
Care and use guide for the PeriPod M3 multi-channel peristaltic doser used on aquarium/reservoir setups; wall-mount bracket is secured using M3 screws per the mounting instructions
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- 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.
- 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
- Pond/aquarium equipment manuals aimed at consumers rarely specify exact thread pitch or length for internal fasteners, since these are considered non-user-serviceable; distributor-level assembly/service manuals (e.g., Maytronics internal documents) are a better source than end-user guides.
- 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.
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Questions about Bluelab PeriPod M3 Automatic Nutrient/pH Dosing Pump (aquarium/hydroponic dosing equipment) screws
- What size screw does Bluelab PeriPod M3 Automatic Nutrient/pH Dosing Pump (aquarium/hydroponic dosing equipment) use?
- M3 for care and use guide for the PeriPod M3 multi-channel peristaltic doser used on aquarium/reservoir setups; wall-mount bracket is secured using M3 screws per the mounting instructions.
- How long are the screws in Bluelab PeriPod M3 Automatic Nutrient/pH Dosing Pump (aquarium/hydroponic dosing equipment)?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- 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 Bluelab PeriPod M3 Automatic Nutrient/pH Dosing Pump (aquarium/hydroponic dosing equipment)?
- 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.