Complete the fixing when screwed onto bolts, screws and threaded rods.

White zinc-plated screw class 4.8 Unifix
Key features
- Head diameter5,5, 8,4, 9,3, 11,3, 15,8
- DrivePH1, PH2, PH3
- L thread3,3, 5,3, 7,3, 11,3, 13,3, 17,3, 22,3, 27,3, 5,9, 11,9, 15,9, 19,9, 25,9, 35,9, 5,7, 11,7, 15,7, 20…
- Screw diameter mm x lengthM3x6, M3x8, M3x10, M3x14, M3x16, M3x20, M3x25, M3x30, M4x10, M4x16, M4x20, M4x25, M4x30, M4x40, M5x…
What it is
The Unifix white zinc-plated TPS Class 4.8 metric screw (code 0048-3-6-01) is the reliable solution for precise fixings in professional settings where robustness and corrosion resistance are essential. Designed for industrial, building and maintenance applications, this screw delivers consistent performance even in damp environments or those exposed to the weather.
Metric fasteners include metric-thread screws and bolts, spacers and small parts such as split pins, for joining parts with a nut or into a tapped hole.
What it is for
Used for assembling steel structures, in steel fabrication, from cutting to assembly and for mechanical fixing of structures and components to walls, ceilings and floors.
How to use it
Choose diameter, length, property class and material, zinc-plated or stainless, according to the joint and the environment. Insert the screw into the clearance or tapped hole, add the washer and tighten the nut with a spanner of the correct size, without exceeding the specified torque. Insert split pins through the hole in the pin or bolt and bend them over to stop the nut from working loose.
Where it is used
- Mechanical engineering industry
- Mechanical workshops
Technical data
- Head diameter: 5,5, 8,4, 9,3, 11,3, 15,8
- Drive: PH1, PH2, PH3
Who it is for
Designed for metal fabricators, industrial maintenance technicians and mechanics.
Related products
- White zinc-plated screw class 8.8 Unifix
- White zinc-plated screw class 8.8 Unifix
- Flanged nut Unifix — from the category Hex Nuts
- Flat washer, galvanised, white, Unifix — from the category Flat Washers
- Combination wrench, series B01 Unifix — from the category Combination Spanners
- Browse the whole category: Bolts and Metric Screws
Before you order
In your request, please state the diameter and the quantities required, so we can give you the right quotation first time.
For prices and availability, request a quote from AMES Srl: we will reply with our quotation, delivery times and, where needed, an equivalent technical alternative.
Specifications 4
| Head diameter | 5,5, 8,4, 9,3, 11,3, 15,8 |
|---|---|
| Drive | PH1, PH2, PH3 |
| L thread | 3,3, 5,3, 7,3, 11,3, 13,3, 17,3, 22,3, 27,3, 5,9, 11,9, 15,9, 19,9, 25,9, 35,9, 5,7, 11,7, 15,7, 20… |
| Screw diameter mm x length | M3x6, M3x8, M3x10, M3x14, M3x16, M3x20, M3x25, M3x30, M4x10, M4x16, M4x20, M4x25, M4x30, M4x40, M5x… |
The perfect setup for this job
Everything you need in one place, from functionality to safety.
For the job
Spread the load under nuts and screws and stop the fixing coming loose.
Tighten and loosen nuts and bolts with the open end or the polygonal ring end.
Tighten and loosen hex nuts and screws of different sizes with a single ratchet.




