M1.4 Micro Small Countersunk Phillips Machine Screws (Trade series (micro machine screws)) are specified by thread size, length and head dimensions. The M1.4 row from the standard is reproduced below, followed by the drill sizes, spanner size and torque values used when installing this size.
M1.4 Dimensional Row (Trade series (micro machine screws))
| Thread size | Head diameter (mm) | Head height (mm) | Typical length range (mm) | Countersink angle (deg) | Material options |
|---|---|---|---|---|---|
| M1.4 | 2.0 | 0.45 | 2~20 | 90 | steel / A2 or 316 stainless / brass |
Spanner & Drive for M1.4 Micro Small Countersunk Phillips Machine Screws
The hex socket for M1.4 Micro Small Countersunk Phillips Machine Screws is shown in the spec table — use the matching Allen / hex key (an ISO 2936 hex key set covers the full range). Ball-end keys are for reaching the screw, not for tightening it — finish on the plain end, and on production work use a torque-controlled driver.
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 Micro Small Countersunk Phillips Machine Screws Weight
A steel M1.4 micro small countersunk phillips machine screws at the listed 220 mm length weighs approximately 2.7 g each — about 2.7 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 Micro Small Countersunk Phillips Machine Screws
- Use a quality Allen key fully seated in the socket — partial engagement is the most common cause of stripped sockets at this size.
- For countersunk and button-head variants, chamfer the through-hole to seat the head flush without preloading the head/shank fillet.
- 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 micro small countersunk phillips machine screws in a size this table does not list?
This page covers M1.4 micro small countersunk phillips machine screws. Material and finish are usually what drives a special — a grade the standard part is not stocked in, or a coating chosen against a salt-spray figure instead of a default. Made by cold heading or warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
