What size screw does FJD 3D Excavator Guidance System (GNSS/IMU hardware) use?

M5 × 12 mm for hardware installation manual for excavator machine-control system specifies M5x12 screws for mounting the mast/receiver bracket hardware; M6 × 14–50 mm for installation manual specifies M6x14, M6x20, and M6x50 screws for mounting the boom sensor and cab controller brackets on excavators.

How long are the screws in FJD 3D Excavator Guidance System (GNSS/IMU hardware)?

The records range from 12 to 50 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M5 screw?

0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.

What screwdriver do I need for FJD 3D Excavator Guidance System (GNSS/IMU hardware)?

The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.

Can I use an imperial screw instead of M5?

No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.

FJD 3D Excavator Guidance System (GNSS/IMU hardware) screw size

M5 / M6 · 12 to 50 mm long

Our records put FJD 3D Excavator Guidance System (GNSS/IMU hardware) on M5 and M6 screws in lengths from 12 to 50 mm.

There are 2 separate fitment records for it, including hardware installation manual for excavator machine-control system specifies M5x12 screws f (M5) and installation manual specifies M6x14, M6x20, and M6x50 screws for mounting the boom sensor (M6).

2 of the 2 records are marked confirmed, drawn from 1 source (mail.gpsgeometer.com).

For reference, M5 is 5 mm across the threads at 0.8 mm pitch. The imperial size people confuse it with: #10-32 (4.83 mm) — the other common rack thread; check before mixing.

FJD 3D Excavator Guidance System (GNSS/IMU 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
M5	12 mm	0.8 mm	not stated	not stated	Hardware installation manual for excavator machine-control system specifies M5x12 screws for mounting the mast/receiver bracket hardware	Confirmed
M6	14–50 mm	1 mm	not stated	not stated	Installation manual specifies M6x14, M6x20, and M6x50 screws for mounting the boom sensor and cab controller brackets on excavators	Confirmed

Fitment records and sources

M5M5x12confirmed

Hardware installation manual for excavator machine-control system specifies M5x12 screws for mounting the mast/receiver bracket hardware

pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25

Source

M6M6x14, M6x20, M6x50confirmed

Installation manual specifies M6x14, M6x20, and M6x50 screws for mounting the boom sensor and cab controller brackets on excavators

pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30

Source

How to check the screw before you buy

Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). This device also uses M6, so measure each screw rather than assuming they match.
Pitch: 0.8 mm from one thread crest to the next (12.5 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 records span 12–50 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M5 heads take PH2 for Phillips and T25 for Torx, and a 4 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 M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.

Common mix-ups with M5 / M6

Archery sight and rest hardware is almost always imperial 10-24, not metric.
Ski and snowboard binding screws vary by brand and insert system (4x4, Channel, Tyrolia, Marker). Aftermarket suppliers standardise on M5/M6 but OEM screws can be a different pitch.
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.
Astro dovetail hardware is inconsistent: Losmandy-brand dovetail plate screws are 1/4-20 (imperial) per Losmandy/Astro-Physics documentation, while PrimaLuceLab's PLUS-standard dovetails explicitly use M6 — don't assume metric across all 'Losmandy-style' dovetail ecosystems.

Pitch gauge · Screw size finder · Torque guide

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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The same screw also fits

Devices whose records share a thread with FJD 3D Excavator Guidance System (GNSS/IMU hardware), closest length match first.

RF Elements Twin Horn antenna bracket also M6 × 16–20 mm
PCB Piezotronics IMI M624B01 (bolt M081A67) Ring-style ICP accelerometer stud mount for heavy/off-highway equipment also M6 × 28.5 mm
Tektronix RM5 rackmount kit (5/6 Series MSO) also M6 × 16 mm
Weidmueller ZB 35 busbar terminal blocks / DIN-rail busbar system also M6 × 16 mm
EcoFlow Power Kits Power Hub wall/RV mounting hardware also M5 × 12 mm
E-scooter fenders & kickstands also M5 × 12 mm
Bicycle bottle cage bosses (Trek and industry standard) also M5 × 12 mm
Weidmuller WDU 70/95 and WDU 120/150 terminal blocks also M6 × 16 mm

Questions about FJD 3D Excavator Guidance System (GNSS/IMU hardware) screws

What size screw does FJD 3D Excavator Guidance System (GNSS/IMU hardware) use?: M5 × 12 mm for hardware installation manual for excavator machine-control system specifies M5x12 screws for mounting the mast/receiver bracket hardware; M6 × 14–50 mm for installation manual specifies M6x14, M6x20, and M6x50 screws for mounting the boom sensor and cab controller brackets on excavators.
How long are the screws in FJD 3D Excavator Guidance System (GNSS/IMU hardware)?: The records range from 12 to 50 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M5 screw?: 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
What screwdriver do I need for FJD 3D Excavator Guidance System (GNSS/IMU hardware)?: The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
Can I use an imperial screw instead of M5?: No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.

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