What size screw does Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge use?

M3 × 8 mm for speed and imbalance recognition assembly, parts list "Z-SCREW M3 X 8"; M4 × 10–12 mm for unit ground (PE) terminal uses one M4 x 10 mm screw; receptacle assembly uses M4 x 12.

How long are the screws in Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge?

The records range from 8 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 Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge?

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 Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge?

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

Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge screw size

M3 / M4 · 8 to 12 mm long

If you are replacing a screw on Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge, the thread is M3 and M4 in lengths from 8 to 12 mm.

There are 2 separate fitment records for it, including speed and imbalance recognition assembly, parts list "Z-SCREW M3 X 8" (M3) and unit ground (PE) terminal uses one M4 x 10 mm screw; receptacle assembly uses M4 x 12 (M4).

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

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.

Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge 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	Speed and imbalance recognition assembly, parts list "Z-SCREW M3 X 8"	Confirmed
M4	10–12 mm	0.7 mm	not stated	not stated	Unit ground (PE) terminal uses one M4 x 10 mm screw; receptacle assembly uses M4 x 12	Confirmed

Fitment records and sources

M38 mmconfirmed

Speed and imbalance recognition assembly, parts list "Z-SCREW M3 X 8"

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

Source

M410 mm and 12 mmconfirmed

Unit ground (PE) terminal uses one M4 x 10 mm screw; receptacle assembly uses M4 x 12

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

Source

How to check the screw before you buy

For medical and lab equipment, use the manufacturer's replacement part where one is specified; the thread size here helps identify it, not certify it.
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 8–12 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

Blender, toothbrush and shaver teardowns list Torx/Phillips bit sizes only; a T8 bit tells you nothing about the thread.
Trijicon RMR (#6-32) and RMRcc (#5-40) mounting screws are imperial, not M3, even though accessory sellers list them as M3.
US-made pinball machines (Williams/Bally/Stern) overwhelmingly use imperial UTS threads (#6-32, #8-32, #10-32); explicit metric threads only appear on newer/import components such as Jersey Jack Pinball's Hobbit Smaug assembly (M3).
Robot vacuum, air purifier and baby monitor teardowns list screws by driver and length only — length is not a thread size.

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 Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge, closest length match first.

cab XD4T industrial label printer also M3 × 8 mm
TSC MH241 industrial label printer also M4 × 10–12 mm
ResMed S9 Elite CPAP chassis also M3 × 8 mm
ResMed VPAP / S8 service hardware also M3 × 8 mm
Prosthetic pyramid adapter also M4 × 10–12 mm
Surgical / veterinary instrument handles also M3 × 8 mm
TSC MH241 / MH341 / MH641 industrial label printer also M3 × 8 mm
Philips System One CPAP housing also M3 × 8 mm

Questions about Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge screws

What size screw does Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge use?: M3 × 8 mm for speed and imbalance recognition assembly, parts list "Z-SCREW M3 X 8"; M4 × 10–12 mm for unit ground (PE) terminal uses one M4 x 10 mm screw; receptacle assembly uses M4 x 12.
How long are the screws in Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge?: The records range from 8 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 Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge?: 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 Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge?: TechSpareWarehouse (our own store) lists M3 x 8mm, which matches the length in the records above.

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