21mm Ball Washer for M20 Screws D1:21 D3:36 H2:6.3 R:27, DIN 6319C - AMF

Take advantage of the DIN‑compliant fit combined with a Ø21 mm bore and clearly defined seating geometry for reliable bolted assemblies — order directly via Metav Werkzeuge or ask the consultants for application support.

Spherical washer DIN 6319C by AMF — for M20 screws, bore Ø21 mm

The spherical washer DIN 6319C provides a self‑aligning seating surface for hexagon screw connections, engineered for industrial bolted joints where controlled contact geometry and repeatable alignment are required.

• DIN 6319C standard compliant
• Bore Ø 21 mm for M20 screws
• Outer diameter 36 mm, height 6.3 mm
• Precision radius R 27 mm

Reliable standard compliance for secure connections

Meeting DIN 6319C ensures consistent seating and repeatable performance in production and maintenance environments. The standardised geometry minimises misalignment between screw head and component, which reduces the risk of uneven clamping forces and subsequent joint loosening. This results in fewer rework cycles and steadier assembly quality across batches, supporting lean production and predictable maintenance intervals.

Precise dimensions that speed up assembly

The defined bore of Ø21 mm together with an outer diameter of 36 mm and a height of 6.3 mm provides a tight, predictable fit for M20 fastenings. The specified radius R 27 mm aids in distributing contact stresses evenly, lowering the likelihood of surface indentation or component distortion. Such dimensional clarity simplifies fixture planning and reduces the time spent checking tolerances during installation.

Improved joint performance through controlled seating

A spherical seating element with correct geometry helps the bolted joint accommodate minor angular deviations without imposing additional bending moments on the screw. The result is a more uniform clamping force and improved fatigue behaviour in cyclic loads. For applications that demand stability under vibration or variable loads, this component supports longer service life and lowers the probability of unscheduled downtime.

Practical advantages for workshops and industrial users

Supplied by AMF and packaged per unit, the part is suited to both repair shops and production lines that require single‑piece ordering for bespoke maintenance tasks. The compact design and familiar standard make it straightforward to stock as a spare part, while the clearly documented dimensions facilitate integration into inventory systems and CAD libraries.

Procurement and supply continuity for professionals

The component is identified by SKU 4000833461NW and is available through Metav’s procurement channels; selecting standardised parts like this spherical seating washer simplifies logistics and reduces supplier complexity. Professional purchasers benefit from predictable availability and the documentation necessary for quality management and traceability.

Contact Metav Werkzeuge for AMF components and expert guidance on dimensional suitability and stocking strategies — the Metav team provides application advice and reliable supply from Emmerich.

Technical data

• Article number: 4000833461NW
• Standard: DIN 6319C
• Type: Spherical washer

Facts

• Bore diameter D1: 21 mm
• Outer diameter D3: 36 mm
• Height H2: 6.3 mm
• Radius R: 27
• Packaging unit: 1

Special features

• Compatible with M20 screws
• Brand: AMF
• Label: Spherical washer for M20, bore Ø21 mm

FAQ

Is this washer suitable for M20 screw connections? Yes. The spherical washer is specified for use with M20 screws and features a Ø21 mm bore for correct fit.

Which standard does the component comply with? The part complies with DIN 6319C, ensuring standardised seating geometry and repeatable assembly characteristics.

What are the key dimensions to check for installation? Key dimensions are the bore Ø21 mm, outer diameter 36 mm and height 6.3 mm; these determine compatibility with mating parts.

Can this washer reduce joint loosening under vibration? Yes. The washer’s spherical seating and radius R 27 mm help distribute loads evenly, improving clamping uniformity and resistance to loosening.

How is the part identified for ordering and stock control? The article is listed under SKU 4000833461NW and described as a spherical washer to DIN 6319C for M20.

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