The M24 size of Phillips Countersunk Self-Tapping Screw is dimensioned by GB/T 846 / ISO 7050. The table below gives the dimensional row from the standard, followed by 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.
M24 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 |
|---|---|---|---|---|---|---|---|
| M24 | 3.0 | 150 | 43.5 | 12.0 | PH4 | 90 | ISO 7046 / GB/T 819 |
Spanner & Drive for M24 Phillips Countersunk Self-Tapping Screw — GB/T 846 / ISO 7050 (Series 028)
The hex socket for M24 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). On production work use a torque-controlled driver so the seating force is the same from part to part.
Installation Tips for M24 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 M24 the stretch in the bolt becomes the controlling factor — for critical joints, use angle-controlled or stretch-controlled tightening instead of pure torque.
Mating Parts for M24
For M24, pair with a M24 hex nut (ISO 4032 / DIN 934) and, where used, a M24 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 M24 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.
