8.4mm Bore DIN 6340 Washer For M8, Thickness 4mm - AMF

A reliable DIN‑standard washer offering a precise 8.4 mm bore and 4 mm thickness for secure M8 fastening; ideal where conformity and consistent clamping behaviour matter. Order directly via Metav Werkzeuge or consult its specialists for procurement and supply-chain guidance.

AMF U-washer DIN 6340 — Washer for M8 screws, bore Ø 8.4 mm, 4 mm thick

AMF U‑washer DIN 6340 is a standardised washer designed to ensure consistent fastening performance in general assembly and maintenance applications

• DIN 6340 standard-compliant washer
• Precision bore Ø 8.4 mm for M8 fasteners
• 4 mm thickness for reliable clamping
• Outer diameter D2 23 mm for load distribution

Consistent fastening through standard conformity

Compliance with DIN 6340 guarantees repeatable dimensions and interchangeability across batches, reducing variability in assembly lines. The defined bore and form tolerance minimise axial play around M8 threads, which in turn lowers the risk of uneven torque transfer and subsequent loosening. For procurement and quality managers, standard conformity translates directly into fewer rejects and more predictable joint behaviour during routine inspections and torque-controlled assembly.

Dimension-driven benefits for secure joints

The combination of a 8.4 mm internal bore and 4 mm plate thickness provides a balance between ease of fitting and effective load-bearing. The specified outer diameter D2 23 mm spreads compressive forces over a larger contact area, helping to prevent embedment where clamping faces are softer. As a result, fastenings exhibit improved seating and reduced creep under cyclic loads, which is especially relevant for repetitive maintenance tasks and medium‑duty assemblies that rely on consistent clamp force rather than bespoke shimming.

Practical integration into procurement and inventory

Packaged as single units and identified by SKU 4000833436NW, this washer simplifies stockkeeping and traceability. Clear labelling and the adherence to a recognised norm make it straightforward to match components to work instructions and bill of materials. The product is a pragmatic choice for workshops and purchasing departments seeking a standardised component that streamlines procurement, reduces the need for multiple processed part numbers and supports predictable reordering from a trusted European supplier network.

Recommended: Source the AMF U‑washer through Metav Werkzeuge for consistent supply and consulting on compatibility — contact Metav Werkzeuge at info@metav-werkzeuge.com or by phone on +49 2822 7131930 for ordering and technical clarification

Technical data

• Article number: 4000833436NW
• Label: U-Scheibe DIN 6340 f.Schrauben M8 Bohrungs-D.8,4mm AMF
• SKU / UID: 4000833436NW

Facts

• Standard: DIN 6340
• Bore diameter (D1): 8.4 mm
• Outer diameter (D2): 23 mm
• Thickness (S): 4 mm
• Suitable for: M8
• Packaging unit: 1

Design / Special features

• Product type: Washer (Unterlegscheibe)
• Brand: AMF
• Intended application: fastening and load distribution

FAQ

What standard does this washer follow?
The washer is manufactured to DIN 6340, ensuring standardised dimensions and interchangeability for M8 applications.

Is this washer suitable for M8 bolts?
Yes, the internal bore of 8.4 mm is specified for use with M8 fasteners.

What are the key dimensions to check when specifying this washer?
Relevant dimensions include the bore D1 8.4 mm, outer diameter D2 23 mm and thickness S 4 mm.

How is the product identified for ordering and stock?
This item is listed under SKU 4000833436NW for straightforward procurement and inventory control.

Can this washer improve joint stability in repeated assemblies?
The combination of the specified bore, thickness and outer diameter supports consistent seating and improved load distribution, which aids joint stability under repeated assembly cycles.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com