Join metal parts, with a nut or in a tapped hole, so they can be taken apart.

Flat washer, galvanised, white, Unifix
Also known as: plain washer
Key features
- Diameter9, 10, 12, 14, 16, 20, 24, 28, 30, 34, 37, 39, 44, 50, 56
- Thickness0,8, 1, 1,6, 2, 2,5, 3, 4
- Internal diameter4,3, 5,3, 6,4, 7,4, 8,4, 10,5, 13, 15, 17, 19, 21, 23, 25, 28, 31
What it is
The Unifix white zinc-plated flat washer (code 0407-004-01) is an essential component for distributing load evenly in bolted joints, ensuring stability and corrosion protection. Designed for construction, mechanical and industrial maintenance professionals, it suits applications where precision and durability are priorities.
A washer is a perforated disc placed under the nut or screw head to spread the load, prevent loosening or insulate the fixing.
What it is for
Used for assembling steel structures and for mechanical fixing of structures and components to walls, ceilings and floors.
How to use it
Choose an inner diameter matching the screw or threaded rod and a compatible material (zinc-plated, stainless steel, plastic). Place flat washers and penny washers under the nut to avoid damaging the substrate and to spread the pressure; place the spring washer under the nut, where it is flattened on tightening to resist vibration loosening. Use seismic washers only with the anchor they are certified for.
Where it is used
- Mechanical engineering industry
Technical data
- Diameter: 9, 10, 12, 14, 16, 20, 24, 28, 30, 34, 37, 39, 44, 50, 56
- Thickness: 0,8, 1, 1,6, 2, 2,5, 3, 4
- Internal diameter: 4,3, 5,3, 6,4, 7,4, 8,4, 10,5, 13, 15, 17, 19, 21, 23, 25, 28, 31
Who it is for
Designed for metal fabricators and industrial maintenance technicians.
Related products
- Flat washer stainless steel A2 AISI 304 Unifix
- Flat washer in copper Unifix
- Flanged nut Unifix — from the category Hex Nuts
- Threaded rod with nut and washer for chemical anchor Unifix — from the category Threaded Rods
- White zinc-plated screw class 8.8 Unifix — from the category Bolts and Metric Screws
- Browse the whole category: Flat Washers
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 3
| Diameter | 9, 10, 12, 14, 16, 20, 24, 28, 30, 34, 37, 39, 44, 50, 56 |
|---|---|
| Thickness | 0,8, 1, 1,6, 2, 2,5, 3, 4 |
| Internal diameter | 4,3, 5,3, 6,4, 7,4, 8,4, 10,5, 13, 15, 17, 19, 21, 23, 25, 28, 31 |
The perfect setup for this job
Everything you need in one place, from functionality to safety.
For the job
Complete the fixing when screwed onto bolts, screws and threaded rods.
Make tie rods, hangers and chemical anchor fixings together with nuts, washers and connectors.
Tighten and loosen nuts and bolts with the open end or the polygonal ring end.




