M3.5 Double-Ended Screw
This is a left/right-hand double-ended adjusting screw with a M3.5 left-hand thread at one end and a M2.5 right-hand thread at the other, hex-socket driven.
| Dia. M1 (mm) | M3.5 |
|---|---|
| Pitch P1 (mm) | 0.6 |
| Length L2 (mm) | 7 |
| Dia. M2 (mm) | M2.5 |
| Pitch P2 (mm) | 0.45 |
| Length L3 (mm) | 7 |
| Overall Length L1 (mm) | 16 |
| Socket Depth L4 (mm) | 3 |
Overview
Tooling screws are precision fasteners used to clamp cutting tools, inserts and fixture elements in machine tooling. They operate under repeated high-frequency tightening and are usually the smallest, most highly stressed screw in the assembly, so drive geometry and thread tolerance matter more than raw strength alone.
What sets this listing apart: Length L2 (mm) 7; Length L3 (mm) 7.
Advantages
Reinforced drives resist cam-out, which is the dominant failure on small tooling screws driven at high cycle rates.
Wear-resistant finishes extend recess life on screws that are opened many times per shift.
Precision-turned threads hold a consistent pitch diameter, so clamp load repeats from one assembly to the next instead of drifting with thread variation.
Applications
CNC tool holders, collet chucks, fixture plates, die and mould clamping, and precision assembly jigs.
Match the drive to the torque and the access angle: a worn recess fails before the thread does. Specify the seat geometry together with the head style.
Product information is supplied by Toprecision. Custom parts can be produced to drawing — contact us for samples or a quotation.
Specifications across this series
8 parts in this series
| Part | Length L2 | Length L3 | Overall Length L… | Pitch P1 |
|---|---|---|---|---|
| M3 Double-Ended Screw · 4.7 / 5.8 / 14.3 | 4.7 | 5.8 | 14.3 | 0.5 |
| M3.5 Double-Ended Screw · 7 / 16 / 0.6 | 7 | 7 | 16 | 0.6 |
| M3.5-1 Double-Ended Screw · 6.8 / 7.2 / 16 | 6.8 | 7.2 | 16 | 0.6 |
| M4 Double-Ended Screw · 8 / 9 / 19 | 8 | 9 | 19 | 0.7 |
| M4-1 Double-Ended Screw · 8 / 9 / 19 | 8 | 9 | 19 | 0.7 |
| M5 Double-Ended Screw · 9.5 / 10.5 / 23 | 9.5 | 10.5 | 23 | 0.8 |
| M6 Double-Ended Screw · 12.3 / 12.6 / 28 | 12.3 | 12.6 | 28 | 1 |
| M6-1 Double-Ended Screw · 10.9 / 13.9 / 32 | 10.9 | 13.9 | 32 | 1 |
Values are taken from each part’s own attribute set. Changing length, material or finish changes pull-out strength and installation torque, so compare the row that matches your drawing.
Selection and test data: engagement length, standards, salt-spray hours
FAQ
What are the key dimensions of this part?
Dia. M1 M3.5, Pitch P1 0.6, Length L2 7, Dia. M2 M2.5.
What material and finish is it supplied in?
Carbon Steel.
What should I verify before ordering or installing it?
Match the drive to the torque and the access angle: a worn recess fails before the thread does. Specify the seat geometry together with the head style.