How long are the screws in Rotrics DexArm sliding rail kit?

The records range from 8 to 10 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 Rotrics DexArm sliding rail kit?

The source lists a Hex socket (Allen) drive. Standard M5 heads otherwise take PH2 (Phillips) or T25 (Torx), or 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.

Rotrics DexArm sliding rail kit screw size

M5 · 8 to 10 mm long

The screws used on Rotrics DexArm sliding rail kit are M5 in lengths from 8 to 10 mm.

Where it is used: M5*10 countersunk hex and M5*8 hex socket screws in official kit part list.

Head and drive, as the source states them: flat / countersunk head and Hex socket (Allen) drive.

This entry is marked confirmed and comes from manual.rotrics.com.

An M5 screw is 5 mm in diameter with a 0.8 mm pitch, tapped with a 4.2 mm drill; imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.

Rotrics DexArm sliding rail kit 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	8–10 mm	0.8 mm	Flat / countersunk	Hex socket (Allen)	M510 countersunk hex and M58 hex socket screws in official kit part list	Confirmed

Fitment records and sources

M58-10mmconfirmed

M5*10 countersunk hex and M5*8 hex socket screws in official kit part list

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

Source

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 M5 screw measures about 5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
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: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
The records span 8–10 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source names a Hex socket (Allen) drive. For comparison, standard M5 heads take PH2 (Phillips) or T25 (Torx), or a 4 mm hex key.
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

M5x0.8 is the de facto universal bike thread — confirm 0.8mm pitch before threading into carbon or alloy bosses.

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 Rotrics DexArm sliding rail kit, closest length match first.

Drum tension rod / lug screw also M5 × 10 mm
Large / industrial drones also M5 × 8–10 mm
Cycling shoe cleat bolts also M5 × 10 mm
Voron gantry and frame joints also M5 × 8–10 mm
Bosch e-bike battery mounting/guide bolts also M5 × 9–10 mm
Ottobock 17AD1 ankle joint screw (heavier plastic) also M5 × 8 mm
Rack and fender eyelets also M5 × 10 mm
Rear-view / side mirror bracket also M5 × 10 mm

Questions about Rotrics DexArm sliding rail kit screws

What size screw does Rotrics DexArm sliding rail kit use?: M5 × 8–10 mm for M5*10 countersunk hex and M5*8 hex socket screws in official kit part list.
How long are the screws in Rotrics DexArm sliding rail kit?: The records range from 8 to 10 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 Rotrics DexArm sliding rail kit?: The source lists a Hex socket (Allen) drive. Standard M5 heads otherwise take PH2 (Phillips) or T25 (Torx), or 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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