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.

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.

Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware screw size

M1.4 · 2 to 6 mm long

The screws used on Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware are M1.4 in lengths from 2 to 6 mm.

It is listed for NBK SPA-M1.4-MC1 datasheet explicitly lists 'M (Coarse) Nominal of Thread: M1.4' with lengths 2/2.5/3/3.5/4/6 mm — generic micro-fastener catalog part, not confirmed installed in a named hearing aid model.

This entry is marked unverified and comes from nbk1560.com.

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.

Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware 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	2–6 mm	0.3 mm	not stated	not stated	NBK SPA-M1.4-MC1 datasheet explicitly lists 'M (Coarse) Nominal of Thread: M1.4' with lengths 2/2.5/3/3.5/4/6 mm — generic micro-fastener catalog part, not confirmed installed in a named hearing aid model	Unverified

Fitment records and sources

M1.4M1.4 x 2 to M1.4 x 6 mmunverified — generic catalog part, no confirmed device installation (excluded from confirmed count; listed for reference only)

NBK SPA-M1.4-MC1 datasheet explicitly lists 'M (Coarse) Nominal of Thread: M1.4' with lengths 2/2.5/3/3.5/4/6 mm — generic micro-fastener catalog part, not confirmed installed in a named hearing aid model

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

For a wall or arm mount, the screw has to engage the threaded insert by several turns but must not bottom out, so measure the insert depth and add the thickness of the bracket and any spacers.
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 2–6 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

Eyewear screws are named thread x shaft x length, a different convention from ISO metric naming — easy to order wrong.
Dental implant screws (M1.4/M1.6) are proprietary per system — Bredent, NeoBiotech, Nobel and Straumann are not interchangeable even at the same nominal 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 Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware, closest length match first.

Lenovo IdeaPad Duet 3 Chrome 11Q727 also M1.4 × 2 mm
Nintendo Switch Joy-Con rear shell screws (4x) also M1.4 × 5 mm
Universal eyeglass hinge screw (2.0mm head) also M1.4 × 4 mm
Fairphone 4 internal screws also M1.4 × 3.5–4.5 mm
Samsung Galaxy Z Fold hinge and board also M1.4 × 2 mm
Eyeglasses/sunglasses hinge screw also M1.4 × 4 mm
Dell Inspiron 15 7580 also M1.4 × 2 mm
Eyeglass/precision hinge screws (also used in small electronics/headphone hinges) also M1.4 × 4.8 mm

Questions about Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware screws

What size screw does Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware use?: M1.4 × 2–6 mm for NBK SPA-M1.4-MC1 datasheet explicitly lists 'M (Coarse) Nominal of Thread: M1.4' with lengths 2/2.5/3/3.5/4/6 mm — generic micro-fastener catalog part, not confirmed installed in a named hearing aid model.
How long are the screws in Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware?: The records range from 2 to 6 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 Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware?: 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 Miniature plastic machine screw (RENY) marketed for micro-precision assemblies including hearing-aid-scale hardware?: TechSpareWarehouse (our own store) lists M1.4 x 2mm, which matches the length in the records above.

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