What size screw does Epson SC-P8500D / T7700D large-format printer use?

M3 × 8–10 mm for silver M3 x 8 Cup S-tite and M3 x 10 Cup P-tite screws mounting the CIS module; M4 × 8 mm for silver M4 x 8 machine screw, right-side mounting.

How long are the screws in Epson SC-P8500D / T7700D large-format printer?

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 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 Epson SC-P8500D / T7700D large-format printer?

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 Epson SC-P8500D / T7700D large-format printer?

TechSpareWarehouse (our own store) lists M3 x 8mm and M3 x 10mm, which match lengths in the records above.

Epson SC-P8500D / T7700D large-format printer screw size

M3 / M4 · 8 to 10 mm long

Epson SC-P8500D / T7700D large-format printer takes M3 and M4 metric screws in lengths from 8 to 10 mm.

There are 2 separate fitment records for it, including silver M3 x 8 Cup S-tite and M3 x 10 Cup P-tite screws mounting the CIS module (M3) and silver M4 x 8 machine screw, right-side mounting (M4).

2 of the 2 records are marked confirmed, drawn from 1 source (channel.epson.com.au).

For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

Epson SC-P8500D / T7700D large-format printer 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	8–10 mm	0.5 mm	not stated	not stated	Silver M3 x 8 Cup S-tite and M3 x 10 Cup P-tite screws mounting the CIS module	Confirmed
M4	8 mm	0.7 mm	not stated	not stated	Silver M4 x 8 machine screw, right-side mounting	Confirmed

Fitment records and sources

M38-10mmconfirmed

Silver M3 x 8 Cup S-tite and M3 x 10 Cup P-tite screws mounting the CIS module

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

Source

M48mmconfirmed

Silver M4 x 8 machine screw, right-side mounting

pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20

Source

How to check the screw before you buy

Check whether the mount uses a VESA pattern or a vendor bracket before buying screws.
Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). This device also uses M4, so measure each screw rather than assuming they match.
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 records span 8–10 mm, which means different positions take different lengths — match each hole to its own screw.
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 / M4

Label printer parts lists write M3*6 with an asterisk; that is still a true ISO M3 x 6mm machine screw.
Some sewing-machine screws are labeled with metric-looking but slightly nonstandard sizes (e.g. M3.3) that are not true ISO M3 and are not interchangeable with standard M3 hardware.
Water heater elements use pipe threads (NPSM/NPT), not metric machine screws.
Bopla SHR-Z boss screws and Hammond 1591XXF screws look metric but are self-tapping/imperial — don't substitute a machine screw into those 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 Epson SC-P8500D / T7700D large-format printer, closest length match first.

Elo floor-mount self-service stand screw also M3 × 8 mm
Elo countertop self-service stand screw also M3 × 8 mm
Elo self-service kiosk stand base screw (Bag A/B) also M4 × 8 mm
Diebold Nixdorf DN100 ATM also M3 × 8 mm
Elo self-service kiosk stand pan-head screw (Bag C) also M3 × 8 mm
Elo self-service kiosk stand (15-22in floor-top) also M4 × 8 mm
Bixolon SRP-B300II POS receipt printer also M3 × 8 mm
HP LaserJet 9000/9040/9050 series printer also M3 × 8 mm

Questions about Epson SC-P8500D / T7700D large-format printer screws

What size screw does Epson SC-P8500D / T7700D large-format printer use?: M3 × 8–10 mm for silver M3 x 8 Cup S-tite and M3 x 10 Cup P-tite screws mounting the CIS module; M4 × 8 mm for silver M4 x 8 machine screw, right-side mounting.
How long are the screws in Epson SC-P8500D / T7700D large-format printer?: 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 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 Epson SC-P8500D / T7700D large-format printer?: 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 Epson SC-P8500D / T7700D large-format printer?: TechSpareWarehouse (our own store) lists M3 x 8mm and M3 x 10mm, which match lengths in the records above.

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