M1.4 is one of the standard coarse-thread sizes for miniature captive pan-head screws under Trade series (miniature captive screws). The sections below reproduce the dimensional row, list the matching tools and hole sizes, and summarize where this size is normally specified.
M1.4 Dimensional Row (Trade series (miniature captive screws))
| Thread size | Length options (mm) | Head diameter (mm) | Captive length (mm) | Under-head length (mm) | Maximum torque (N·m) |
|---|---|---|---|---|---|
| M1.4 | 4 / 5 / 6 / 8 / 10 | 2.0 | 2.0 | 0.5 | 0.03 |
Spanner & Drive for M1.4 Miniature Captive Pan-Head Screws
Drive geometry for M1.4 Miniature Captive Pan-Head Screws is given by the row above; match the tool to the listed values.
Hole Sizes for M1.4
| Coarse-thread pitch (ISO 724) | 0.3 mm |
|---|---|
| Through-hole / clearance (ISO 273 medium) | 1.6 mm |
| Tapping drill, coarse thread | 1.1 mm |
Tightening Torque for M1.4
| Class 8.8 (dry, ~µ 0.125) | ≈ Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ Nm |
Indicative dry-joint values. Lubrication can lower the required torque by 15–25%. Always confirm against the joint design, especially when going up a strength class.
Proof Load & Strength for M1.4
| Tensile stress area As (ISO 724) | 1 mm² |
|---|
Proof load = tensile stress area × the proof stress Sp of the class, per ISO 898-1 — Sp is a lower figure than the yield stress Rp0.2 and the two are not interchangeable. The stress area is computed from this size's own diameter and pitch, so a fine-pitch designation gives the fine-pitch figure. Design the joint so the working preload stays below the proof load of the class selected.
M1.4 Miniature Captive Pan-Head Screws Weight
A steel M1.4 miniature captive pan-head screws at the listed 456,810 mm length weighs approximately 5,520 g each — about 5,520 kg per 1,000 pieces. Stainless A2/A4 weighs roughly the same (density 7.9–8.0 g/cm³).
Actual weight varies slightly with head form, thread and finish; use this figure for freight estimation only.
Installation Tips for M1.4 Miniature Captive Pan-Head Screws
- Pozidriv (PZ) drivers ride out of Phillips (PH) recesses and vice versa — confirm the recess marking on the head before assembly.
- For automated assembly, an ACR (Anti-Cam-Out Ribs) or torx-equivalent driver gives noticeably longer bit life than plain PH.
- At M1.4 the joint is sensitive to over-torque — use a torque-limiting driver and check the head doesn't bury into a softer counterpart.
Mating Parts for M1.4
For M1.4, pair with a M1.4 hex nut (ISO 4032 / DIN 934) and, where used, a M1.4 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
Custom manufacturing · Made to drawing
Need miniature captive pan-head screws in a size this table does not list?
This page covers M1.4 miniature captive pan-head screws. Where the standard stops, the drawing takes over: fine pitches, left-hand threads, partial threading, and property classes above the catalogued grade where material and heat treatment allow. Made by cold heading or warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
