What size screw does HP Color LaserJet 8500 2000-sheet input unit use?

M3 × 6–8 mm for M3 x 6mm tapping screw, M3 x 8mm screw with washer and M3 x 6mm RS-type chassis screw; M4 × 8–12 mm for M4 x 8mm tapping screw and M4 x 12mm screw with washer.

How long are the screws in HP Color LaserJet 8500 2000-sheet input unit?

The records range from 6 to 12 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 HP Color LaserJet 8500 2000-sheet input unit?

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 HP Color LaserJet 8500 2000-sheet input unit?

TechSpareWarehouse (our own store) lists M3 x 6mm and M3 x 8mm, which match lengths in the records above.

HP Color LaserJet 8500 2000-sheet input unit screw size

M3 / M4 · 6 to 12 mm long

Our records put HP Color LaserJet 8500 2000-sheet input unit on M3 and M4 screws in lengths from 6 to 12 mm.

There are 2 separate fitment records for it, including M3 x 6mm tapping screw, M3 x 8mm screw with washer and M3 x 6mm RS-type chassis screw (M3) and M4 x 8mm tapping screw and M4 x 12mm screw with washer (M4).

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

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.

HP Color LaserJet 8500 2000-sheet input unit 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	6–8 mm	0.5 mm	not stated	not stated	M3 x 6mm tapping screw, M3 x 8mm screw with washer and M3 x 6mm RS-type chassis screwwasher / flange face	Confirmed
M4	8–12 mm	0.7 mm	not stated	not stated	M4 x 8mm tapping screw and M4 x 12mm screw with washerwasher / flange face	Confirmed

Fitment records and sources

M36-8mmconfirmed

M3 x 6mm tapping screw, M3 x 8mm screw with washer and M3 x 6mm RS-type chassis screw

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

Source

M48-12mmconfirmed

M4 x 8mm tapping screw and M4 x 12mm screw with washer

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 6–12 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

Sonos speakers mix lengths within one unit — M3 for driver housings, M2.5 at the control panel. Keep them sorted during teardown.
The bioprinter M3 reference is a tube-connector thread spec, not a structural chassis screw; verify before assuming interchangeability with fastener screws.
Some rackmount KVM switch kits pair M4x10 bracket-to-rack screws with M3.2x4.5 bracket-to-chassis screws (non-standard M3.2, not a true M3), so kits are not fully interchangeable with generic M3/M4 hardware.
Most HVAC chassis hardware in US-market units is imperial; metric shows up mainly on European-made components.

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 HP Color LaserJet 8500 2000-sheet input unit, closest length match first.

Lexmark T620 laser printer also M3 × 6–8 mm
Elo EMV kit for Verifone MX915/M400, Ingenico ISC250 self-service stand mount also M3 × 8 mm
Diebold Nixdorf ATM (PN 49221808000F-26) also M3 × 6 mm
Diebold Opteva ATM cassette screw also M4 × 8–12 mm
Coin-door / vending coin mech holder thumb screw also M4 × 8 mm
Brother DCP-8110D laser printer also M4 × 12 mm
JCM DBV-200 bill validator also M3 × 6 mm
NCR ATM repairing components screw also M4 × 10 mm

Questions about HP Color LaserJet 8500 2000-sheet input unit screws

What size screw does HP Color LaserJet 8500 2000-sheet input unit use?: M3 × 6–8 mm for M3 x 6mm tapping screw, M3 x 8mm screw with washer and M3 x 6mm RS-type chassis screw; M4 × 8–12 mm for M4 x 8mm tapping screw and M4 x 12mm screw with washer.
How long are the screws in HP Color LaserJet 8500 2000-sheet input unit?: The records range from 6 to 12 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 HP Color LaserJet 8500 2000-sheet input unit?: 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 HP Color LaserJet 8500 2000-sheet input unit?: TechSpareWarehouse (our own store) lists M3 x 6mm and M3 x 8mm, which match lengths in the records above.

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