How long are the screws in CR-10 Max heat-block cooling shroud?

The record gives 8 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.

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 CR-10 Max heat-block cooling shroud?

The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take 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.

Where can I buy replacement screws for CR-10 Max heat-block cooling shroud?

TechSpareWarehouse (our own store) lists M3 x 8mm, which matches the length in the records above.

CR-10 Max heat-block cooling shroud screw size

M3 · 8 mm long

If you are replacing a screw on CR-10 Max heat-block cooling shroud, the thread is M3, 8 mm long.

The record covers build notes: 2x M3 x 8 socket head screws to mount the heat block cooling part.

This entry is marked reported and comes from 3dsearch.net.

M3 means a 3 mm nominal diameter with a 0.5 mm thread pitch. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

CR-10 Max heat-block cooling shroud 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
M3	8 mm	0.5 mm	not stated	not stated	Build notes: 2x M3 x 8 socket head screws to mount the heat block cooling part	Reported

Fitment records and sources

M38mmreported

Build notes: 2x M3 x 8 socket head screws to mount the heat block cooling part

pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10

Source

How to check the screw before you buy

Printer and CNC builds usually publish a bill of materials; when it lists a length, follow it, since extrusion T-nuts and motor faces have fixed thread depths.
Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
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.
The record states 8 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 M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M3

Terminal-block clamp screws have manufacturer-specific torque values — over-tightening cracks the block or crushes the wire.
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.

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 CR-10 Max heat-block cooling shroud, closest length match first.

E3D V6 hotend fixing kit also M3 × 8 mm
Prusa i3 MK3S/MK4 printed parts and extruder also M3 × 8 mm
Voron 2.4 gantry and panels also M3 × 8 mm
Voron 2.4 / Trident printed parts also M3 × 8 mm
Bambu Lab AMS unit also M3 × 8 mm
Bambu Lab X1 / P1 / A1 frame and toolhead also M3 × 8 mm
Voron 2.4 gantry and carriage hardware also M3 × 8 mm
Voron 2.4 / Trident also M3 × 8 mm

Questions about CR-10 Max heat-block cooling shroud screws

What size screw does CR-10 Max heat-block cooling shroud use?: M3 × 8 mm for build notes: 2x M3 x 8 socket head screws to mount the heat block cooling part.
How long are the screws in CR-10 Max heat-block cooling shroud?: The record gives 8 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
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 CR-10 Max heat-block cooling shroud?: The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take 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.
Where can I buy replacement screws for CR-10 Max heat-block cooling shroud?: TechSpareWarehouse (our own store) lists M3 x 8mm, which matches the length in the records above.

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