Trimble NAV-900 Guidance Controller screw size
M6 · 14 mm long
The screws used on Trimble NAV-900 Guidance Controller are M6, 14 mm long.
There are 2 separate fitment records for it, including base mounting plate (P/N 109315) to controller housing (M6) and roof mounting tray fasteners (torque 10 Nm) (M6).
2 of the 2 records are marked confirmed, drawn from 1 source (Trimble NAV-900 Installation Guide 108993-00-ENG Rev C).
For reference, M6 is 6 mm across the threads at 1 mm pitch. The imperial size people confuse it with: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
Trimble NAV-900 Guidance Controller 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 |
|---|---|---|---|---|---|---|---|
| M6 | 14 mm | 1 mm | not stated | not stated | not stated | base mounting plate (P/N 109315) to controller housing | Confirmed |
| M6 | not stated | 1 mm | not stated | not stated | 10 Nm | roof mounting tray fasteners (torque 10 Nm) | Confirmed |
Fitment records and sources
base mounting plate (P/N 109315) to controller housing
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
Source: Trimble NAV-900 Installation Guide 108993-00-ENG Rev C
roof mounting tray fasteners (torque 10 Nm)
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
Source: Trimble NAV-900 Installation Guide 108993-00-ENG Rev C
How to check the screw before you buy
- Industrial parts lists usually give the full callout (thread, length, head, grade); match all four, not just the thread.
- Diameter: across the threads an M6 screw measures about 6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 1 mm from one thread crest to the next (10 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 14 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 M6 heads take PH3 for Phillips and T30 for Torx, and a 5 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
Common mix-ups with M6
- No screw length given, only torque — measure existing hardware before replacing.
- UR cobot flange bolts are commonly sold/quoted as 'M6 bolts' but the required length depends on the tool thickness; UR's own guidance is bolt class M6-8.8 to ISO4762 without a fixed length, so length must be selected per adapter/tool stack-up, not assumed as a fixed mm value.
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- Gas grill control panel also M6 × 14 mm
- VESA MIS-F large display mount also M6 × 14 mm
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Questions about Trimble NAV-900 Guidance Controller screws
- What size screw does Trimble NAV-900 Guidance Controller use?
- M6 × 14 mm for base mounting plate (P/N 109315) to controller housing; M6 for roof mounting tray fasteners (torque 10 Nm).
- How long are the screws in Trimble NAV-900 Guidance Controller?
- The record gives 14 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M6 screw?
- 1 mm (coarse), which is the standard pitch for M6 machine screws; a 0.75 mm fine pitch exists but is uncommon. The tap drill is 5 mm and the normal clearance hole is 6.6 mm.
- What screwdriver do I need for Trimble NAV-900 Guidance Controller?
- The sources do not name the drive. For M6, Phillips heads normally take PH3 and Torx heads T30; socket heads take a 5 mm hex key.
- Can I use an imperial screw instead of M6?
- No. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6. Use a true M6 screw so it does not cross-thread or strip the hole.
- How tight should the M6 screw on Trimble NAV-900 Guidance Controller be?
- The source gives 10 Nm for roof mounting tray fasteners (torque 10 Nm).