Traxxas Spartan SR (Model 103076-4) boat screw size
M4 · 3 mm long
The screws used on Traxxas Spartan SR (Model 103076-4) boat are M4, 3 mm long.
The record covers drive dog grub screw, stainless with threadlock.
Head and drive, as the source states them: set screw (headless) head.
This entry is marked confirmed and comes from traxxas.com.
An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Traxxas Spartan SR (Model 103076-4) boat 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 |
|---|---|---|---|---|---|---|
| M4 | 3 mm | 0.7 mm | Set screw (headless) | not stated | Drive dog grub screw, stainless with threadlockthread-locking patch, stainless | Confirmed |
Fitment records and sources
Drive dog grub screw, stainless with threadlock
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Vibration loosens small screws on drones and RC models, so builders commonly add a drop of medium (blue) threadlocker on metal-to-metal joints — never on plastic.
- Diameter: across the threads an M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: for set screw (headless) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 3 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 M4 heads take PH2 for Phillips and T20 for Torx, and a 3 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 M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- Dashcam mounts advertised as '1/4" M4 screw joint' have two different threads: the 1/4"-20 camera thread and a separate M4 grub screw for the ball joint — don't order the wrong one.
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
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- Bondtech primary gear (8mm bore) also M4 × 3 mm
- Kolm Engines EZ77V4 model aircraft engine also M4
- Berkel 330M Slicer base/transmission fastener (short) also M4
- Model engineering oil cup / glass oiler connection thread (alternate size) also M4
- European mortise lock faceplates also M4
- GoPro-style action cam mount on FPV frames also M4
- Meccano boxed sets (modern metric era) and compatible parts also M4
Questions about Traxxas Spartan SR (Model 103076-4) boat screws
- What size screw does Traxxas Spartan SR (Model 103076-4) boat use?
- M4 × 3 mm for drive dog grub screw, stainless with threadlock.
- How long are the screws in Traxxas Spartan SR (Model 103076-4) boat?
- The record gives 3 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for Traxxas Spartan SR (Model 103076-4) boat?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.