Description
The M20 Thick Flat Washer is a heavy-duty metric flat washer used in Virtus Equipment and ZERMA America granulators and shredders at M20 fastener positions requiring greater load distribution and surface protection than a standard thin washer provides. The increased washer thickness delivers a larger contact area and greater resistance to deformation under high clamping loads — critical in positions subject to significant static and dynamic forces such as rotor assemblies, cutting chamber mounting points, and main structural connections.
Technical Specifications:
SKU: 80010781
Thread Size: M20
Type: Flat Washer — Thick Profile
Standard: DIN 7349 / ISO 7093
Related Parts: M20 Thin Washer — SKU: 80010780 | M20 × 60 Hex Bolt — SKU: 80010140 | M20 × 65 Hex Bolt — SKU: 80010160 | M20 × 70 Hex Bolt — SKU: 80010180
Sold As: Individual washer; bulk quantities available
Key Features
Heavy-Duty Load Distribution: Increased thickness spreads M20 bolt clamping force across a larger bearing area than thin washers — essential for high-stress assembly positions in granulators and shredders.
Deformation Resistance: Greater material thickness resists washer deformation under high clamping loads, maintaining consistent joint preload over the machine’s service life.
OEM-Specification Profile: Thick washer geometry matches the original Virtus Equipment and ZERMA America assembly specifications for positions requiring enhanced load bearing.
Consistent Torque Surface: Smooth, flat bearing surface ensures accurate torque application and repeatable clamping force during assembly and maintenance.
Vibration Resistance: Proper washer selection and correct bolt torque work together to minimize fastener loosening under continuous machine vibration.
Bulk Availability: Available individually or in bulk quantities for maintenance department stocking programs.
It is important to use the correct washer profile — thin or thick — for each specific assembly position as called out in your machine’s parts documentation. Substituting a thin washer where a thick washer is specified can result in insufficient load distribution, surface damage to mating components, and increased risk of fastener loosening under vibration. Always replace washers any time fasteners are removed and reinstalled during routine maintenance or component replacement.
Compatibility: Virtus Equipment and ZERMA America granulators and shredders (multiple models — see machine parts documentation)
