What size screw does Fishing reel handle and drag knob use?

M3 × 4–8 mm for small reel handle and drag knob screws.

How long are the screws in Fishing reel handle and drag knob?

The records range from 4 to 8 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 Fishing reel handle and drag knob?

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 Fishing reel handle and drag knob?

TechSpareWarehouse (our own store) lists M3 x 4mm, M3 x 5mm and M3 x 6mm, which match lengths in the records above.

Fishing reel handle and drag knob screw size

M3 · 4 to 8 mm long

Fishing reel handle and drag knob takes M3 metric screws in lengths from 4 to 8 mm.

The record covers small reel handle and drag knob screws.

This entry is marked reported.

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.

Fishing reel handle and drag knob 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	4–8 mm	0.5 mm	not stated	not stated	Small reel handle and drag knob screws	Reported

Fitment records and sources

M34-8mmreported

Small reel handle and drag knob screws

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

How to check the screw before you buy

Outdoor hardware should be stainless or coated to stop corrosion seizing it in place.
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 records span 4–8 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

Telescope thumbscrews are sold in a wide non-metric legacy range too (1/4-20, 8-32, 10-32 on many Meade/Celestron mounts), so metric M3/M4 fitment applies mainly to newer/international accessory ecosystems (SkyWatcher, generic 1.25" accessories) and should not be assumed universal.
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 Fishing reel handle and drag knob, closest length match first.

OuterImpact Red Dot Adapter Plate (Vortex Viper / Burris Fast Fire pattern) also M3 × 8 mm
OuterImpact Micro Red Dot Adapter Plate (Swampfox pattern) also M3 × 8 mm
Crowcon Xgard Bright fixed gas detector (mining/oil & gas) also M3 × 6 mm
HP ProBook 440 G0 also M3 × 4 mm
Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge also M3 × 8 mm
Dell Inspiron 4150 also M3 × 5 mm
HP EliteBook 8560p also M3 × 5 mm
HP Compaq 8710w also M3 × 4 mm

Questions about Fishing reel handle and drag knob screws

What size screw does Fishing reel handle and drag knob use?: M3 × 4–8 mm for small reel handle and drag knob screws.
How long are the screws in Fishing reel handle and drag knob?: The records range from 4 to 8 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 Fishing reel handle and drag knob?: 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 Fishing reel handle and drag knob?: TechSpareWarehouse (our own store) lists M3 x 4mm, M3 x 5mm and M3 x 6mm, which match lengths in the records above.

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