What size screw does Behind-the-ear hearing aid shell use?

M1.4 × 2–4 mm for joins the two halves of the housing.

How long are the screws in Behind-the-ear hearing aid shell?

The records range from 2 to 4 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M1.4 screw?

0.3 mm (coarse), which is the standard pitch for M1.4 machine screws. The tap drill is 1.1 mm and the normal clearance hole is 1.6 mm.

What screwdriver do I need for Behind-the-ear hearing aid shell?

The sources do not name the drive. For M1.4, Phillips heads normally take PH000 / PH00 and Torx heads T2–T3; socket heads take a 1.3 mm hex key.

Can I use an imperial screw instead of M1.4?

No. Imperial look-alike: #0-80 UNF (1.52 mm) — close in diameter, different pitch, do not mix. Use a true M1.4 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Behind-the-ear hearing aid shell?

TechSpareWarehouse (our own store) lists M1.4 x 2mm, which matches the length in the records above.

Behind-the-ear hearing aid shell screw size

M1.4 · 2 to 4 mm long

Our records put Behind-the-ear hearing aid shell on M1.4 screws in lengths from 2 to 4 mm.

It is listed for joins the two halves of the housing.

This entry is marked reported and comes from stamm.ch.

For reference, M1.4 is 1.4 mm across the threads at 0.3 mm pitch. The imperial size people confuse it with: #0-80 UNF (1.52 mm) — close in diameter, different pitch, do not mix.

Behind-the-ear hearing aid shell 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
M1.4	2–4 mm	0.3 mm	not stated	not stated	joins the two halves of the housing	Reported

Fitment records and sources

M1.42-4mmreported

joins the two halves of the housing

pitch 0.3 mm · tap 1.1 mm · clearance 1.6 mm · PH000 / PH00 / Torx T2–T3

Source

How to check the screw before you buy

Keep material and finish the same as the original (often stainless) on equipment that is cleaned or sterilised.
Diameter: across the threads an M1.4 screw measures about 1.4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.3 mm from one thread crest to the next (33.33 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 2–4 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M1.4 heads take PH000 / PH00 for Phillips and T2–T3 for Torx, and a 1.3 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 M1.4 is about 8-12 N·cm into metal threads and 4-7 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M1.4

M1.4 is THE Samsung Galaxy internal screw across S, A, M and Note lines — but lengths run 2.3mm to 4mm+ and are not interchangeable between models.

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 Behind-the-ear hearing aid shell, closest length match first.

Sennheiser wireless mic battery/locking mechanism (MKH800, SK6000) also M1.4 × 3 mm
Dental handpiece cartridge screws also M1.4 × 2–4 mm
Bredent dental prosthetic screw also M1.4 × 3–4 mm
Hearing aid shells also M1.4 × 2–2.5 mm
DJI Mini 2 gimbal camera arm screws also M1.4 × 2.5 mm
LG smartphones also M1.4 × 2.5–3.5 mm
Camera lens/body low-profile 'JIS Micro Profile' fastener also M1.4 × 4 mm
Sennheiser SK6000 / MKH800 battery lock also M1.4 × 3 mm

Questions about Behind-the-ear hearing aid shell screws

What size screw does Behind-the-ear hearing aid shell use?: M1.4 × 2–4 mm for joins the two halves of the housing.
How long are the screws in Behind-the-ear hearing aid shell?: The records range from 2 to 4 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M1.4 screw?: 0.3 mm (coarse), which is the standard pitch for M1.4 machine screws. The tap drill is 1.1 mm and the normal clearance hole is 1.6 mm.
What screwdriver do I need for Behind-the-ear hearing aid shell?: The sources do not name the drive. For M1.4, Phillips heads normally take PH000 / PH00 and Torx heads T2–T3; socket heads take a 1.3 mm hex key.
Can I use an imperial screw instead of M1.4?: No. Imperial look-alike: #0-80 UNF (1.52 mm) — close in diameter, different pitch, do not mix. Use a true M1.4 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Behind-the-ear hearing aid shell?: TechSpareWarehouse (our own store) lists M1.4 x 2mm, which matches the length in the records above.

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