Metric screw assemblies
Screw and washer supplied as one assembly to simplify picking, installation and kitting. Choose the head, property class and washer combination for your joint.
Explore configurations →FASTENERS / SCREW & WASHER ASSEMBLIES
Pre-assembled screws
Screws with one or more captive washers, standard configurations and made-to-specification assemblies for industrial production.
Configuration and availability are defined around your specific requirements.
SCREW TYPES
Choose by screw, washer and application.
From standard supply to drawing-based assemblies: choose a starting point and tell us what your assembly process needs.
Tapping and thread-forming screws
Assemblies for self-tapping or thread-forming applications. Tell us about the substrate and hole so we can help define the appropriate solution.
Define your requirements →Custom and multi-element assemblies
One, two, three or more components in one assembly. Specify functional washers, dedicated heads or drawing-based parts for your production.
Prepare an enquiry →Choose the screw type, head and drive
Select a feature to search documented configurations. For combinations not listed, prepare a dedicated enquiry.
Head
Drive
Screw type
Need a different combination?Work with us on a drawing-based or custom specification.Request your assembly →
Configure your screw and washer assembly
Typical configurations: compare the components and choose a starting point for your enquiry. If none fits, work with Dueemme on a made-to-specification solution.
Illustrative assembly diagrams. Dimensions, geometry and performance must be defined in the assembly specification.
All eight drawings use the same socket-head cap screw. Only the washer configuration changes; the final sequence is agreed in the assembly specification.
CONFIGURATION FINDER
Find your screw and washer assembly
Find a starting configuration by material, head, drive and washers. If your combination is not listed, carry your requirements into a custom enquiry.
TECHNICAL KNOWLEDGE
A screw standard is not an assembly standard.
Screw references, washer references and assembly requirements serve different purposes. Historical DIN designations are not automatically interchangeable with ISO standards.
SEMS screws and terminology
“SEMS screws” is a useful commercial term for certain captive-washer assemblies. It does not, by itself, define a standard, material or every possible pre-assembled configuration.
| Reference | How to use it |
|---|---|
| ISO 10644:2009 | Steel metric screw assemblies with captive plain washers. Its defined scope does not automatically cover stainless steel or multiple-washer configurations. |
| ISO 10510:2011 | Tapping screw assemblies with plain washers. A separate technical route from metric screw assemblies. |
| ISO 10673:2009 | Plain washers for metric screw assemblies: small, normal and large series. Not a general specification for every washer type. |
| DIN 6900 / DIN 6901 | Identify the part, edition and status. DIN 6900-5:2025-12 addresses assemblies with conical spring washers. |
| DIN 6905 / DIN 6907 | Historical catalogue references: the 1990-12 editions are withdrawn. A commercial reference does not establish compliance with a current standard. |
Fewer separate parts to handle.
Simpler assembly handling
The washer stays with the screw, reducing the number of separate parts to pick and position.
Clearer bills of materials and kits
An identified assembly supports kitting, packaging and purchasing requirements.
Serial supply planning
Order quantities, annual demand and delivery schedules become part of the same commercial specification.
SPECIAL & CUSTOM
Can’t find the right assembly? Specify your own.
Request a different screw, one or more washers, a dedicated material or finish. Send your drawing, sample or requirements: Dueemme works with you to define the assembly and assess manufacturing feasibility. Geometry requiring development follows the specialist ATTREX route.
Configure your custom enquiry →Start with the application requirements.
- Electromechanical equipment and electronicsSpecify clearance, tool access and any electrical contact or insulation requirements.
- Automotive and motorsportIdentify customer specifications, traceability and documentation requirements. No approval is assumed.
- Lighting and furnitureDefine the bearing surface, visible finish and appearance requirements.
- Machinery and packaging equipmentSpecify assembly cycles, maintenance, mating materials and the operating environment.
REQUEST FOR QUOTE
Tell us exactly which assembly you need.
Select the screw, washers, material, finish and quantity. Start with an example or describe a different assembly. Add your drawing and contact details in the next step.