M20 Nyloc Nut (DIN 985) | Marine Grade A4-80 Stainless Steel

Product code: LN985-M20-A4-80
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M20 Nyloc Nut (DIN 985) | Marine Grade A4-80 Stainless Steel
M20 Nyloc Nut (DIN 985) | Marine Grade A4-80 Stainless Steel
M20 Nyloc Nut (DIN 985) | Marine Grade A4-80 Stainless Steel
M20 Nyloc Nut (DIN 985) | Marine Grade A4-80 Stainless Steel
M20 Nyloc Nut (DIN 985) | Marine Grade A4-80 Stainless Steel
M20 Nyloc Nut (DIN 985) | Marine Grade A4-80 Stainless Steel
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Unit Price
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Unit Price
(inc. VAT)
1 - 99 £1.18 £1.41
100 - 499 £1.02 £1.23
500 - 999 £0.78 £0.94
1000 + £0.67 £0.80

£1.41 / each


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Product Specification
Thread Size M20
Thread Pitch 2.50mm
Material A4-80 Stainless Steel
Across Flats 30mm
Height 20mm
Standard DIN 985

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Order by 4pm (UK) for same day dispatch, Monday to Thursday or 2pm Friday.

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Frequently Bought Together

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M20 Thin Nyloc Hex Nut | 2.50mm Pitch | DIN 985 | A4-80 Stainless Steel

Designed for machinery, equipment and general engineering assemblies, this M20 metal locknut combines a metal hex nut body with a nylon insert to help resist loosening caused by vibration or repeated movement. The DIN 985 thin pattern keeps the overall height to 20mm while maintaining the specified 2.50mm metric thread. The A4 stainless steel construction provides enhanced corrosion resistance for suitable outdoor, coastal and marine fastening applications.

What Are DIN 985 Nyloc Nuts?

DIN 985 Nylon Lock Nuts use a polymer insert above the metal thread to create resistance against the mating bolt. The nut body remains metal while the nylon insert provides the locking action which makes these fasteners useful in vibration-prone mechanical assemblies.

This DIN 985 style sits within our wider thin nyloc nuts range. For applications that require a taller nylon insert nut, our high nyloc nuts provide the DIN 982 alternative.

Common Applications

  • Machinery: Helps secure bolts on guards, brackets and equipment where vibration could loosen a conventional nut.
  • Automotive Assemblies: Provides a locking nut for suitable brackets, panels and mechanical fixings exposed to movement.
  • Electrical Equipment: Secures compatible bolts in control panels, enclosures and equipment frames.
  • General Engineering: Provides a reusable locking fastener for fabricated assemblies, maintenance work and mechanical builds.

M20 DIN 985 Thin Nyloc Hex Nut Dimensions

  • Thread Size: M20
  • Thread Pitch: 2.50mm
  • Across Flats: 30mm
  • Height: 20mm
  • Material: A4-80 Stainless Steel
  • Standard: DIN 985

Key Benefits

  • Self-locking format can reduce the need for a separate locking washer in suitable assemblies.
  • 2.50mm thread pitch matches compatible metric bolts and threaded components.
  • A4-80 Stainless Steel construction provides the specified metal grade and finish.
  • Nylon insert creates prevailing friction on the mating thread to help resist loosening.

We can help you compare thread sizes, material grades and locking nut styles on 01233 713581.

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