How long are the screws in Floyd Rose locking tremolo saddles?

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 Floyd Rose locking tremolo saddles?

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 Floyd Rose locking tremolo saddles?

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

Floyd Rose locking tremolo saddles screw size

M3 · 8 mm long

Our records put Floyd Rose locking tremolo saddles on M3 screws, 8 mm long.

It is listed for six socket-cap saddle locking / intonation screws, M3-0.5 pitch.

This entry is marked confirmed and comes from allparts.uk.com.

An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

Floyd Rose locking tremolo saddles 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	Six socket-cap saddle locking / intonation screws, M3-0.5 pitch	Confirmed

Fitment records and sources

M38mmconfirmed

Six socket-cap saddle locking / intonation screws, M3-0.5 pitch

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

Source

How to check the screw before you buy

If several screws hold the same part, check that they are all the same length before assuming they are.
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

US-made guitar bridges use #4/#6 imperial intonation screws while imported bridges use M3 — the wrong one strips the saddle.
M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.

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 Floyd Rose locking tremolo saddles, closest length match first.

Backscatter FLIP3.1 underwater filter frame screws (2x) also M3 × 8 mm
Third-party Raspberry Pi cases & HAT stacks also M3 × 8 mm
Hotends & heat breaks (E3D and clones) also M3 × 8 mm
Pumpkin SUPERNOVA 6U CubeSat Structure Kit also M3 × 8 mm
Star Micronics mPOP under-counter mount (CM-POP1) also M3 × 8 mm
Arduino Uno / Mega also M3 × 8 mm
Kenwood TK-8302 transceiver also M3 × 8 mm
2020 aluminium extrusion T-nuts also M3 × 8 mm

Questions about Floyd Rose locking tremolo saddles screws

What size screw does Floyd Rose locking tremolo saddles use?: M3 × 8 mm for six socket-cap saddle locking / intonation screws, M3-0.5 pitch.
How long are the screws in Floyd Rose locking tremolo saddles?: 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 Floyd Rose locking tremolo saddles?: 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 Floyd Rose locking tremolo saddles?: TechSpareWarehouse (our own store) lists M3 x 8mm, which matches the length in the records above.

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