Tesla Powerwall 3 screw size
M3 / M6 · length not stated in the sources
The screws used on Tesla Powerwall 3 are M3 and M6. None of the sources we found gives an exact length, so measure the original before you order.
There are 3 separate fitment records for it, including allen bit used to tighten grounding lugs to 4 Nm (M3), rubber-bonded stainless steel washers/fasteners used for grounding lug and unit mounting (M6) and front cover fasteners, 6 required (M6).
Head and drive, as the sources state them: Hex socket (Allen) drive.
3 of the 3 records are marked confirmed, drawn from 1 source (pimassetsprdst.blob.core.windows.net).
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.
Tesla Powerwall 3 screw specifications
One row per fitment record. Head, drive and torque are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Torque | Where it goes | Status |
|---|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | Hex socket (Allen) | 4 Nm | Allen bit used to tighten grounding lugs to 4 Nm | Confirmed |
| M6 | not stated | 1 mm | not stated | not stated | not stated | Rubber-bonded stainless steel washers/fasteners used for grounding lug and unit mountingstainless, washer / flange face | Confirmed |
| M6 | not stated | 1 mm | not stated | not stated | not stated | Front cover fasteners, 6 required | Confirmed |
Fitment records and sources
Allen bit used to tighten grounding lugs to 4 Nm
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Rubber-bonded stainless steel washers/fasteners used for grounding lug and unit mounting
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
Front cover fasteners, 6 required
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- Take one original screw out first and measure it before ordering; the record above tells you the thread, the original screw tells you the exact length and head.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). This device also uses M6, so measure each screw rather than assuming they match.
- 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 names a Hex socket (Allen) drive. For comparison, standard M3 heads take PH1 (Phillips) or T10 (Torx), or a 2.5 mm hex key.
Common mix-ups with M3 / M6
- 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.
- Thor Zone Nanoq S case mixes metric M3 (various lengths: 4, 5, 6, 10, 13, 20mm) and imperial #6-32 UNC fasteners across the same build, so builders must sort hardware carefully rather than assuming an all-metric kit.
- Small wind turbine literature frequently quotes torque or Allen-key size without a thread size; only callouts with an explicit 'M' designation were kept.
- Big TVs have recessed bosses behind speaker grilles, so spacers are usually required with 200x200 mounts.
More in Other Equipment
The same screw also fits
Devices whose records share a thread with Tesla Powerwall 3, closest length match first.
- Hotends & heat breaks (E3D and clones) also M3
- NanoAvionics M6P nanosatellite payload mounting (PC104 pattern) also M3
- Star Micronics mPOP under-counter mount (CM-POP1) also M3
- Pumpkin SUPERNOVA 6U CubeSat Structure Kit also M3
- Vaisala WXT530 Series Weather Transmitter also M6
- Schneider PowerPacT H-frame breaker busbar terminal nut also M6
- Third-party Raspberry Pi cases & HAT stacks also M3
- Victron MultiPlus-II / Quattro-II inverter also M6
Questions about Tesla Powerwall 3 screws
- What size screw does Tesla Powerwall 3 use?
- M3 for allen bit used to tighten grounding lugs to 4 Nm; M6 for rubber-bonded stainless steel washers/fasteners used for grounding lug and unit mounting; M6 for front cover fasteners, 6 required.
- How long are the screws in Tesla Powerwall 3?
- 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 Tesla Powerwall 3?
- The source lists a Hex socket (Allen) drive. Standard M3 heads otherwise take PH1 (Phillips) or T10 (Torx), or 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.
- How tight should the M3 screw on Tesla Powerwall 3 be?
- The source gives 4 Nm for allen bit used to tighten grounding lugs to 4 Nm.