M3 Phillips Countersunk Self-Tapping Screw are manufactured to GB/T 846 / ISO 7050. This page lists the controlling dimensions for the M3 size together with the drive and the installation notes for this type.
Values are taken from the governing standard rather than from a general machine-thread table, because this type is not selected on one.
M3 Dimensional Row (GB/T 846 / ISO 7050)
| Size | Pitch (mm) | Length L (mm) | Head diameter dk (mm) | Head height k (mm) | Cross recess | Countersink angle (deg) | Reference standard |
|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 20 | 5.6 | 1.65 | PH1 | 90 | ISO 7046 / GB/T 819 |
Spanner & Drive for M3 Phillips Countersunk Self-Tapping Screw — GB/T 846 / ISO 7050 (Series 028)
The hex socket for M3 Phillips Countersunk Self-Tapping Screw — GB/T 846 / ISO 7050 (Series 028) is shown in the spec table — use the matching Allen / hex key (an ISO 2936 hex key set covers the full range). Seating force is what matters here rather than preload, so a torque-controlled driver is what keeps one assembly the same as the next.
Installation Tips for M3 Phillips Countersunk Self-Tapping Screw — GB/T 846 / ISO 7050 (Series 028)
- 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 M3 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 M3
For M3, pair with a M3 hex nut (ISO 4032 / DIN 934) and, where used, a M3 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
Custom manufacturing · Made to drawing
Need phillips countersunk self-tapping screw in a size this table does not list?
This page covers M3 phillips countersunk self-tapping screw. Dimensions, material, finish and form are specified from the drawing — a screw outside the standard range is a variation on existing tooling rather than a new design. Made by cold heading or warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
