Product Description
M4 A2 Stainless Steel Mushroom Slotted Head Machine Screws
M4 mushroom head machine screws manufactured from A2 stainless steel, featuring a wide, shallow rounded head with a slotted drive. The broad head provides a larger bearing surface, making these screws useful for securing panels, covers and thin components.
These corrosion-resistant screws have an M4 metric coarse thread with a 0.7mm pitch. Available in lengths from 12mm to 45mm for general assembly, maintenance and repair work.
Technical Specifications
| Thread Size | M4 |
|---|---|
| Thread Type | Metric coarse |
| Thread Pitch | 0.7mm |
| Material | A2 stainless steel |
| Dimensional Reference | NF E 27-128 |
| Head Style | Mushroom head |
| Drive Type | Slotted |
| Head Diameter | 9.64–10.00mm |
| Head Height | 1.95–2.20mm |
| Slot Width | 1.06–1.26mm |
| Slot Depth | 0.90–1.35mm |
| Length Measurement | Measured from beneath the head to the end of the screw |
Available Sizes
| Thread Size | Screw Length | Thread Pitch |
|---|---|---|
| M4 | 12mm | 0.7mm |
| M4 | 16mm | 0.7mm |
| M4 | 20mm | 0.7mm |
| M4 | 25mm | 0.7mm |
| M4 | 30mm | 0.7mm |
| M4 | 35mm | 0.7mm |
| M4 | 40mm | 0.7mm |
| M4 | 45mm | 0.7mm |
Select your required screw length and pack quantity from the options above.
Fitting Information
Fit into a matching M4 x 0.7mm tapped hole or use with a compatible M4 nut. Check that the surrounding surface accommodates the 10mm head diameter, and choose a length that provides sufficient thread engagement without bottoming out in a blind hole.
Use a flat-bladed screwdriver that fits the slot correctly. Tighten steadily and avoid overtightening, particularly when fastening thin panels or softer materials. Where appropriate, use a suitable anti-seize compound to help reduce stainless steel thread galling, accounting for lubrication when determining tightening torque.
